Lee, Joon Hyeop, Lee, Myung Gyoon, Park, Changbom, Choi, Yun-Young
We present a study on the environments of the SDSS galaxies divided into fine classes based on their morphology, colour and spectral features. The SDSS galaxies are classified into early-type and...
Lee, Joon Hyeop, Lee, Myung Gyoon, Park, Changbom, Choi, Yun-Young
We present a multi-wavelength study of the nature of the SDSS galaxies divided into fine classes based on their morphology, colour and spectral features. The SDSS galaxies are classified into...
Star Formation History and Chemical Evolution of the Sextans Dwarf Spheroidal Galaxy (2009)
Lee, Myung Gyoon, Yuk, In-Soo, Park, Hong Soo, Harris, Jason, Zaritsky, Dennis
We present the star formation history and chemical evolution of the Sextans dSph dwarf galaxy as a function of galactocentric distance. We derive these from the $VI$ photometry of stars in the $42'...
Reddening and Distance of the Local Group Starburst Galaxy IC 10 (2009)
Kim, Minsun, Kim, Eunhyeuk, Hwang, Narae, Lee, Myung Gyoon, Im, Myungshin, Karoji, Hiroshi, ...
We estimate the reddening and distance of the nearest starburst galaxy IC 10 using deep near infrared $JHK_{S}$ photometry obtained with the Multi-Object InfraRed Camera and Spectrograph (MOIRCS) on...
Galaxy Activity in Merging Binary Galaxy Clusters (2009)
Hwang, Ho Seong, Lee, Myung Gyoon
We present the results of a study of galaxy activity in two merging binary clusters (A168 and A1750) using the Sloan Digital Sky Survey (SDSS) data supplemented with the data in the literature. We...
Ages of M33 Star Clusters Based on the HST/WFPC2 Photometry (2009)
Park, Won-Kee, Park, Hong Soo, Lee, Myung Gyoon
We present a result of age estimation for star clusters in M33. We obtain color-magnitude diagrams (CMDs) of resolved stars in 242 star clusters from the HST/WFPC2 images. We estimate ages of 100...
The Mid-infrared View of Red Sequence Galaxies in Abell 2218 with AKARI (2009)
Ko, Jongwan, Im, Myungshin, Lee, Hyung Mok, Lee, Myung Gyoon, Hopwood, Ros H., Serjeant, Stephen, ...
We present the {\it AKARI} InfraRed Camera (IRC) imaging observation of early-type galaxies in A2218 at z $\simeq$ 0.175. Mid-infrared (MIR) emission from early-type galaxies traces circumstellar...
North Ecliptic Pole Wide Field Survey of AKARI: Survey Strategy and Data Characteristics (2009)
Lee, Hyung Mok, Kim, Seong Jin, Im, Myungshin, Matsuhara, Hideo, Oyabu, Shinki, Wada, Takehiko, ...
We present the survey strategy and the data characteristics of the North Ecliptic Pole (NEP) Wide Survey of AKARI. The survey was carried out for about one year starting from May 2006 with 9...
The seventh data release of the sloan digital sky survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
Supernova Remnants in the AKARI IRC Survey of the Large Magellanic Cloud (2008)
Seok, Ji Yeon, Koo, Bon-Chul, Onaka, Takashi, Ita, Yoshifusa, Lee, Ho-Gyu, Lee, Jae-Joon, ...
We present the near- to mid-infared study of supernova remnants (SNRs) using the AKARI IRC Survey of the Large Magellanic Cloud (LMC). The LMC survey observed about a 10 square degree area of the LMC...
Lee, Joon Hyeop, Lee, Myung Gyoon, Park, Changbom, Choi, Yun-Young
We present a comprehensive study of the nature of the SDSS galaxies divided into various classes based on their morphology, colour, and spectral features. The SDSS galaxies are classified into...
Reddening Behaviors of Galaxies in the SDSS Photometric System (2008)
Kim, Sungsoo S., Lee, Myung Gyoon
We analyze the behaviors of reddening vectors in the SDSS photometric system for galaxies of different morphologies, ages, and redshifts. As seen in other photometric systems, the dependence of...
Lee, Induk, Im, Myungshin, Kim, Minjin, Kang, Eugene, Shim, Hyunjin, Richards, Gordon T., ...
We present results from the first phase of the Seoul National University Bright Quasar Survey in Optical (SNUQSO) as well as its basic observational setup. Previous and current large-area surveys...
Lee, Myung Gyoon, Park, Hong Soo, Kim, Eunhyeuk, Hwang, Ho Seong, Kim, Sang Chul, Geisler, Doug
We present a photometric study of the globular clusters in the giant elliptical galaxy M60 in the Virgo cluster, based on deep, relatively wide field Washington CT_1 CCD images. The color-magnitude...
Galaxy Orbits for Galaxy Clusters in Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey (2007)
Hwang, Ho Seong, Lee, Myung Gyoon
We present the results of a study for galaxy orbits in galaxy clusters using a spectroscopic sample of galaxies in Sloan Digital Sky Survey (SDSS) and 2dF Galaxy Redshift Survey (2dFGRS). We have...
A Catalog of Bright Star Clusters in the Interacting Galaxy M51 (2007)
Hwang, Narae, Lee, Myung Gyoon
We present a catalog of star clusters with V_{F555W} 0.7, uniformly distributed over the M51 field. Some of these red clusters are suspected to be a part of the halo or old disk population based on...
Myung Gyoon Lee, Wendy L, Barry F. Madore, Nasa/ipac Extragalactic Database
CCD photometry of 5,300 stars in the central (2'.2 x 3'.5) area of the dwarf elliptical galaxy NGC 185 in the Local Group is presented. color-magnitude diagrams of 185 show three distinct...
Shaun M. Hughes, Barry F. Madore (2007)
And Jeremy California, Shaun M. Hughes, Barry F. Madore, Jeremy R. Mould, Laura Ferrarese, C. Ford, ...
The Distance Scale (HO) Key Project for Space Telescope ( aims employ the period-luminosity relation to measure galaxy distances out as far as the Virgo cluster. The vital steps in this program are...
Washington Ccd Photometry Of The Open Cluster Ngc 1245 (2007)
We have estimated a metal abundance of [Fe/H]= \Gamma0:04 \Sigma 0:05 dex, a reddening of E(B-V)= 0:28 mag, an age of 1:1 \Sigma 0:1 Gyr, and a distance of 2:5 \Sigma 0:2 kpc for NGC 1245 using the...
The Brightest Stars In Galaxies As Distance Indicators (2007)
INTRODUCTION The brightest stars in galaxies have been used as distance indicators since Hubble(1936). However, the accuracy of the brightest stars for distance estimates has been controversial....
Interactions Of The Dwarf Irregular Galaxy Ugc 7636 With The Giant Elliptical Galaxy Ngc 4472 (2007)
Eunhyeuk Kim, Myung Gyoon Lee, Doug Geisler
this paper we present a study of the interactions of UGC 7636 with NGC 4472. Deep Washington CT 1 CCD images centered at NGC 4472 were obtained using the KPNO 4m telescope. In order to remove the...
Structures Of The Dwarf Elliptical Galaxies Ngc185 And Ngc205 (2007)
INTRODUCTION NGC 185 and NGC 205, companions of M31, are dwarf elliptical galaxies with peculiar features such as distinguishable dust clouds and bright blue stars. In this study we present a study...
Myung Gyoon Lee, Sang Chul Kim, Mag R
We present deep BV RI CCD photometry of the stars in the dwarf irregular galaxy SagDIG. The color-magnitude diagrams of the measured stars in SagDIG show a blue plume which consists mostly of young...
Structures of the Dwarf Elliptical Galaxies NGC 185 and NGC 205 (2007)
Sang Chul Kim, Myung Gyoon Lee
NGC 185 and NGC 205, companions of M31, are dwarf elliptical galaxies with peculiar features such as distinguishable dust clouds and bright
OF THE DWARF ELLIPTICAL GALAXIES NGC 185 AND NGC 205 1 (2007)
Surface Photometry, Sang Chul, Myung Gyoon Lee
We present BVRI CCD surface photometry for the central(6
Wide-Field Survey of Globular Clusters in M31. II. Kinematics of the Globular Cluster System (2007)
Lee, Myung Gyoon, Hwang, Ho Seong, Kim, Sang Chul, Park, Hong Soo, Geisler, Doug, Sarajedini, Ata, ...
We present a kinematic analysis of the globular cluster(GC) system in M31. Using the photometric and spectroscopic database of 504 GCs, we have investigated the kinematics of the M31 GC system. We...
The Globular Cluster System of M60 (NGC 4649). I. CFHT MOS Spectroscopy and Database (2007)
Lee, Myung Gyoon, Hwang, Ho Seong, Park, Hong Soo, Park, Jang-Hyun, Kim, Sang Chul, Sohn, Young-Jong, ...
We present the measurement of radial velocities for globular clusters in M60, giant elliptical galaxy in the Virgo cluster. Target globular cluster candidates were selected using the Washington...
The Globular Cluster System of M60 (NGC 4649). II. Kinematics of the Globular Cluster System (2007)
Hwang, Ho Seong, Lee, Myung Gyoon, Park, Hong Soo, Kim, Sang Chul, Park, Jang-Hyun, Sohn, Young-Jong, ...
We present a kinematic analysis of the globular cluster (GC) system in the giant elliptical galaxy (gE) M60 in the Virgo cluster. Using the photometric and spectroscopic database of 121 GCs (83 blue...
Matsuhara, Hideo, Wada, Takehiko, Pearson, Chris P., Oyabu, Shinki, Im, Myungshin, Imai, Koji, ...
We present the results of optical identifications for 257 mid-infrared sources detected with a deep 15um survey over approximately 80 arcmin^2 area in the AKARI performance verification field near...
A Catalog of New M33 Star Clusters Based on the HST/WFPC2 Images (2007)
Park, Won-Kee, Lee, Myung Gyoon
We present the result of a survey for star clusters in M33 using the HST/WFPC2 archive images. We have found 104 star clusters, including 32 new ones, in the images of 24 fields that were not...
Wide-Field Survey of Globular Clusters in M31. I. A Catalog of New Clusters (2007)
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Sarajedini, Ata, Park, Hong Soo, Hwang, Ho Seong, ...
We present the result of a wide-field survey of globular clusters (GCs) in M31 covering a 3deg x 3deg field c. We have searched for GCs on CCD images taken with Washington CMT1 filters at the KPNO...
Lee, Hyung Mok, Im, Myungshin, Wada, Takehiko, Shim, Hyunjin, Kim, Seong Jin, Lee, Myung Gyoon, ...
We present the properties of 11 $\mu$m selected sources detected in the early data of the North Ecliptic Pole Deep (NEP-Deep) Survey of AKARI. The data set covers 6 wavelength bands from 2.5 to 11...
Lee, Joon Hyeop, Lee, Myung Gyoon, Kim, Taehyun, Hwang, Ho Seong, Park, Changbom, Choi, Yun-Young
We present a study of the connection between star-forming galaxies, AGN host galaxies, and normal early-type galaxies in the Sloan Digital Sky Survey (SDSS). Using the SDSS DR5 and DR4plus data, we...
An Optical Source Catalog of the North Ecliptic Pole Region (2007)
Hwang, Narae, Lee, Myung Gyoon, Lee, Hyung Mok, Im, Myungshin, Kim, Taehyun, Matsuhara, Hideo, ...
We present a five (u*,g',r',i',z') band optical photometry catalog of the sources in the North Ecliptic Pole (NEP) region based on deep observations made with MegaCam at CFHT. The source catalog...
Koo, Bon-Chul, Lee, Ho-Gyu, Moon, Dae-Sik, Lee, Jae-Joon, Seok, Ji Yeon, Lee, Hyung Mok, ...
We present a serendipitous detection of the infrared-bright supernova remnant (SNR) B0104-72.3 in the Small Magellanic Cloud by the Infrared Camera (IRC) onboard AKARI. An elongated, partially...
Searching for rotating galaxy clusters in SDSS and 2dFGRS (2007)
Hwang, Ho Seong, Lee, Myung Gyoon
We present a result of searching for galaxy clusters that show an indication of global rotation using a spectroscopic sample of galaxies in SDSS and 2dFGRS. We have determined the member galaxies of...
Hwang, Ho Seong, Serjeant, Stephen, Lee, Myung Gyoon, Lee, Kang Hwan, White, Glenn
We present a result of cross-correlating the Infrared Astronomical Satellite Faint Source Catalogue with the spectroscopic catalogues of galaxies in the Fourth Data Release of the Sloan Digital Sky...
Star Cluster Population of the Interacting Galaxy System M51 (2007)
Hwang, Narae, Lee, Myung Gyoon
We present a star cluster population study in the interacting galaxy system M51 based on HST ACS BVI mosaic images taken by the Hubble Heritage Team to commemorate the HST's 15th anniversary. We have...
Chandra multiwavelength project X-ray point source catalog (2007)
Kim, Minsun, Kim, Dong-Woo, Wilkes, Belinda J., Green, Paul J., Kim, Eunhyeuk, Anderson, Craig S., ...
Kim, Minsun, Wilkes, Belinda J., Kim, Dong-Woo, Green, Paul J., Barkhouse, Wayne A., Lee, Myung Gyoon, ...
Chandra Multiwavelength Project X-ray Point Source Catalog (2006)
Kim, Minsun, Kim, Dong-Woo, Wilkes, Belinda J., Green, Paul J., Kim, Eunhyeuk, Anderson, Craig S., ...
We present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ~6,800 X-ray sources detected in 149 Chandra observations covering \~10 deg^2. The full ChaMP catalog sample is...
Kim, Minsun, Wilkes, Belinda J., Kim, Dong-Woo, Green, Paul J., Barkhouse, Wayne A., Lee, Myung Gyoon, ...
We present the Chandra Multiwavelength Project (ChaMP) X-ray point source number counts and the cosmic X-ray background (CXRB) flux densities in multiple energy bands. From the ChaMP X-ray point...
Ultraluminous and Hyperluminous Infrared Galaxies in the SDSS, 2dFGRS and 6dFGS (2006)
Hwang, Ho Seong, Serjeant, Stephen, Lee, Myung Gyoon, Lee, Kang Hwan, White, Glenn
We present a result of cross-correlating the Infrared Astronomical Satellite Faint Source Catalogue (IRAS FSC) with the spectroscopic catalogues of galaxies in the Fourth Data Release of Sloan...
Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F) (2006)
Matsuhara, Hideo, Wada, Takehiko, Matsuura, Shuji, Nakagawa, Takao, Kawada, Mitsunobu, Oyama, Youichi, ...
AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI...
The Nature of Blue Early-Type Galaxies in the Goods Fields (2006)
Lee, Joon Hyeop, Lee, Myung Gyoon, Hwang, Ho Seong
We present a study of the nature of the blue early-type galaxies (BEGs) in the GOODS north and south fields using the GOODS HST/ACS archival data. Using visual inspection, we have selected 58 BEGs...
Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F) (2006)
Matsuhara, Hideo, Wada, Takehiko, Matsuura, Shuji, Nakagawa, Takao, Kawada, Mitsunobu, Oyama, Youichi, ...
AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI...
Theoretical Isochrones with Extinction in the K Band. II. J - K versus K (2006)
Kim, Sungsoo S., Figer, Donald F., Lee, Myung Gyoon
We calculate theoretical isochrones in a consistent way for five filter pairs near the J and K band atmospheric windows (J-K, J-K', J-Ks, F110W-F205W, and F110W-F222M) using the Padova stellar...
Spatial Distribution of Faint Fuzzy Star Clusters in NGC 5195 (2006)
Hwang, Narae, Lee, Myung Gyoon
We present a study of a faint fuzzy star cluster system in the nearby SB0 galaxy NGC 5195 interacting with the famous spiral galaxy NGC 5194 (M51), based on HST ACS BVI mosaic images taken by the...
Theoretical isochrones with extinction in the K band. II. J - K versus K (2006)
Kim, Sungsoo, Figer, Donald, Lee, Myung Gyoon
Also archived in: arXiv:astro-ph/0601470 v1 20 Jan 2006
Theoretical isochrones with extinction in the K band. II. J - K versus K (2006)
Kim, Sungsoo, Figer, Donald, Lee, Myung Gyoon
Also archived in: arXiv:astro-ph/0601470 v1 20 Jan 2006
Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F) (2006)
Matsuhara, Hideo, Wada, Takehiko, Matsuura, Shuji, Nakagawa, Takao, Kawada, Mitsunobu, Oyama, Youichi, ...
AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI...
Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F) (2006)
Matsuhara, Hideo, Wada, Takehiko, Matsuura, Shuji, Nakagawa, Takao, Kawada, Mitsunobu, Oyama, Youichi, ...
AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI...
Minsun Kim, Belinda J. Wilkes, Dong-woo Kim, Paul J. Green, Wayne A. Barkhouse, Myung Gyoon Lee, ...
We present the Chandra Multiwavelength Project (ChaMP) X-ray point source number counts and cosmic X-ray background (CXRB) flux densities in multiple energy bands. From the ChaMP X-ray point source...
Minsun Kim, Dong-woo Kim, Belinda J. Wilkes, Paul J. Green, Eunhyeuk Kim, Craig S. Anderson, ...
We present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with 6800 X-ray sources detected in 149 Chandra observations covering 10 deg 2. The full ChaMP catalog sample is 7...
BOAO Photometric Survey of Galactic Open Clusters. III. Czernik 24 and Czernik 27 (2005)
Kim, Sang Chul, Park, Hong Soo, Sohn, Sangmo Tony, Lee, Myung Gyoon, Park, Byeong-Gon, Sung, Hwankyung, ...
We present BV CCD photometry for the open clusters Czernik 24 and Czernik 27. These clusters have never been studied before, and we provide, for the first time, the cluster parameters; reddening,...
Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies (2005)
Lee, Myung Gyoon, Hwang, Narae
We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times...
Discovery of Remote Star Clusters in the Halo of the Irregular Galaxy NGC 6822 (2005)
Hwang, Narae, Lee, Myung Gyoon, Lee, Jong Chul, Park, Won-Kee, Park, Hong Soo, Park, Jang-Hyun, ...
We report the discovery of three new star clusters in the halo of the Local Group dwarf irregular galaxy NGC 6822. These clusters were found in the deep images taken with the MegaPrime at the CFHT,...
Low Mass X-ray Binaries in 6 Elliptical Galaxies: Connection to Globular Clusters (2005)
Kim, Eunhyeuk, Kim, Dong-Woo, Fabbiano, Giuseppina, Lee, Myung Gyoon, Park, Hong Soo, Geisler, Doug, ...
We present a systematic study of the low mass X-ray binary (LMXB) populations of 6 elliptical galaxies. We utilize Chandra archival data to identify 665 X-ray point sources and HST archival data...
Properties of Resolved Star Clusters in M51 (2005)
Lee, Myung Gyoon, Chandar, Rupali, Whitmore, Bradley C.
We present a study of compact star clusters in the nearby pair of interacting galaxies NGC 5194/95 (M51), based on multifilter Hubble Space Telescope WFPC2 archival images. We have detected ~400...
Theoretical Isochrones with Extinction in the K Band (2005)
Kim, Sungsoo S., Figer, Donald F., Lee, Myung Gyoon, Oh, Seungkyung
We calculate theoretical isochrones in a consistent way for five filters (K, K', Ks, F205W, and F222M) in the atmospheric window between 1.9 and 2.5 micron using the Padova stellar evolutionary...
Theoretical isochrones with extinction in the K band (2005)
Kim, Sungsoo, Figer, Donald, Lee, Myung Gyoon, Oh, Seungkyung
Also archived in: arXiv:astro-ph/0505089 v1 5 May 2005
Theoretical isochrones with extinction in the K band (2005)
Kim, Sungsoo, Figer, Donald, Lee, Myung Gyoon, Oh, Seungkyung
Also archived in: arXiv:astro-ph/0505089 v1 5 May 2005
Chandar, Rupali, Whitmore, Bradley, Lee, Myung Gyoon
We use available multifilter Hubble Space Telescope (HST) WFPC2 imaging of five (M81, M83, NGC 6946, M101, and M51) low inclination, nearby spiral galaxies to study ancient star cluster populations....
SX Phoenicis Stars in the Globular Cluster NGC 5466 (2004)
Jeon, Young-Beom, Lee, Myung Gyoon, Kim, Seung-Lee, Lee, Ho
Through time-series CCD photometry of the globular cluster NGC 5466, we have detected nine SX Phoenicis stars including three new ones. All the SX Phoenicis stars are located in the blue straggler...
On the Formation of Giant Elliptical Galaxies and Globular Clusters (2003)
I review the current status of understanding when, how long, and how giant elliptical galaxies formed, focusing on the globular clusters. Several observational evidences show that massive elliptical...
New SX Phoenicis Stars in the Globular Cluster M53 (2003)
Jeon, Young-Beom, Lee, Myung Gyoon, Kim, Seung-Lee, Lee, Ho
Through time-series CCD photometry of the metal-poor globular cluster M53, we have discovered eight new SX Phoenicis type stars (labeled from SXP1 to SXP8). All the new SX Phoenicis stars are located...
Radio/X-ray Offsets of Large Scale Jets Caused by Synchrotron Time Lags (2003)
In the internal shock scenario, we argue that electrons in most kpc (or even larger) scale jets can be accelerated to energies high enough to emit synchrotron X-rays, if shocks exist on these scales....
Wide field CCD photometry of the globular cluster M92 (2002)
Lee, Kang Hwan, Lee, Hyung Mok, Fahlman, Gregory G., Lee, Myung Gyoon
We present wide field CCD photometry of a galactic globular cluster M92 obtained in the V and I bands with the CFH12K mosaic CCD at the Canada-France-Hawaii Telescope. A well-defined color-magnitude...
Colley, Wesley N., Schild, Rudolph E., Abajas, Cristina, Alcalde, David, Aslan, Zeki, Bikmaev, Ilfan, ...
We report on an observing campaign in March 2001 to monitor the brightness of the later arriving Q0957+561 B image in order to compare with the previously published brightness observations of the...
Gemini Near-IR Photometry of the Arches Cluster near the Galactic Center (2002)
Yang, Yujin, Park, Hong Soo, Lee, Myung Gyoon, Lee, Sang-Gak
We present Near-IR photometry of the Arches cluster, a young and massive stellar cluster near the Galactic center. We have analyzed the high resolution (FWHM 0.2") H and K' band images in the...
Stellar Contents and Globular Cluster Candidates in the Sculptor Group Galaxy NGC 300 (2002)
Kim, Sang Chul, Sung, Hwankyung, Lee, Myung Gyoon
We present UBVI CCD photometry of the stellar contents and globular cluster(GC) candidates in the spiral galaxy NGC 300 in the Sculptor group. Color-magnitude diagrams for 18 OB associations having...
Lee, Myung Gyoon, Kim, Minsun, Sarajedini, Ata, Geisler, Doug, Gieren, Wolfgang
We have determined the distance to M33 using single epoch I-band observations of Cepheids based on HST/WFPC2 images of five fields in M33. Combining the HST I-band photometry and the periods...
Kim, Minsun, Kim, Eunhyeuk, Lee, Myung Gyoon, Sarajedini, Ata, Geisler, Doug
We have determined the distance to M33 using the tip of the red giant branch (TRGB) and the red clump (RC), from the VI photometry of stars in ten regions of M33 based on HST/WFPC2 images. The...
A Comparative Study of Globular Cluster Systems in UGC 9799 and NGC 1129 (2001)
Lee, Myung Gyoon, Kim, Eunhyeuk, Geisler, Doug, Bridges, Terry, Ashman, Keith
We present a preliminary analysis of HST-WFPC2 observations of globular cluster systems in the two brightest galaxies, UGC 9799 (cD) and NGC 1129 (non-cD), located in the center of rich clusters.
HST-WFPC2 Observations of the Star Clusters in the Giant HII Regions of M33 (2001)
Lee, Myung Gyoon, Park, Hong Soo, Kim, Sang Chul, Waller, William H., Parker, Joel Wm., Malumuth, Eliot M., ...
We present a photometric study of the stars in ionizing star clusters embedded in several giant HII regions of M33 (CC93, IC 142, NGC 595, MA2, NGC 604 and NGC 588). Our photometry are based on the...
Washington Photometry of New Globular Clusters in M31 (2001)
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Seguel, Juan, Sarajedini, Ata, Harris, William E.
We present a progress report on Washington photometry of several hundred new globular cluster (GC) candidates in M31 which were recently found from our new CCD survey of GCs. Washington CMT1 filters...
Surface Photometry of Star Clusters in the Dwarf Elliptical Galaxies NGC 185 and NGC 205 (2001)
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Sarajedini, Ata, Armandroff, Taft E., Da Costa, Gary S.
We present the surface photometry of star clusters in the nearby dwarf elliptical galaxies NGC 185 and NGC 205, obtained from deep HST WFPC2 F555W (V) and F814W (I) images. We have obtained surface...
New CCD Survey of Globular Clusters in M31 (2001)
Lee, Myung Gyoon, Kim, Sang Chul, Geisler, Doug, Seguel, Juan, Sarajedini, Ata, Harris, William
We present a progress report of our wide field CCD survey of globular clusters in M31. We have covered 3 deg X 3 deg area centered on M31, using the KPNO 0.9m and Washington CMT1 filters. Our survey...
Dynamical evolution of rotating stellar systems - II. Post-collapse, equal mass system (2001)
Kim, Eunhyeuk, Einsel, Christian, Lee, Hyung Mok, Spurzem, Rainer, Lee, Myung Gyoon
We present the first post core collapse models of initially rotating star clusters, using the numerical solution of an orbit-averaged 2D Fokker-Planck equation. Based on the code developed by Einsel...
Existence of Large Scale Synchrotron X-ray Jets in Radio-loud Active Galactic Nuclei (2001)
In this paper, analytical arguments are presented that there exists a synchrotron X-ray jet on large scales in most radio-loud AGNs, based on the knowledge of the nature and physics of blazars. In...
Hanes, David A., Cote, Patrick, Bridges, Terry J., McLaughlin, Dean E., Geisler, Doug, Harris, Gretchen L. H., ...
We present a comprehensive database of kinematic, photometric and positional information for 352 objects in the field of M87 (NGC 4486), the central giant elliptical galaxy in the Virgo cluster; the...
Dynamics of the Globular Cluster System Associated with M87 (NGC 4486). II. Analysis (2001)
Cote, Patrick, McLaughlin, Dean E., Hanes, David A., Bridges, Terry J., Geisler, Doug, Merritt, David, ...
We present a dynamical analysis of the globular cluster system associated with M87 (= NGC 4486), the cD galaxy near the dynamical center of the Virgo cluster. The analysis utilizes a new...
'Round the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar (2001)
Colley, Wesley N., Schild, Rudolph E., Abajas, Cristina, Alcalde, David, Aslan, Zeki, Barrena, Rafael, ...
An observing campaign with 10 participating observatories has undertaken to monitor the optical brightness of the Q0957 gravitationally lensed quasar for 10 consecutive nights in January 2000. The...
A New SX Phe Star in the Globular Cluster M15 (2001)
Jeon, Young-Beom, Kim, Seung-Lee, Lee, Ho, Lee, Myung Gyoon
A new SX Phe star (labelled SXP1) found from $BV$ CCD photometry is the first to be discovered in the globular cluster M15. It is a blue straggler and is located $102\arcsec.8$ north and...
Are Cen a and M87 Tev Gamma-Ray Sources? (2001)
In this paper, we identify Cen A and M87, two nearby Fanaroff-Riley I (FRI) radio galaxies, with high-energy-peaked BL Lac-like (HBL-like) objects by investigating their spectral energy distributions...
New Evidence for the Unified Scheme of BL Lac Objects and Fri Radio Galaxies (2000)
In this paper, we collect radio and X-ray observations for most Fanaroff-Riley I (FRI) radio galaxies in the Zirbel-Baum radio galaxy sample, and investigate the distribution of the radio-to-X-ray...
Modern Supernova Search (2000)
Supernovae play a critical role in observational cosmology as well as in astrophysics of stars and galaxies. Recent era has seen dramatic progress in the research of supernovae. Several programs to...
Morphological Number Counts of Galaxies in the Hubble Deep Field South (2000)
Lee, Myung Gyoon, Hwang, Narae
We present a study of photometric properties of the galaxies in the Hubble Deep Field South (HDFS) based on the released WFPC2 images obtained with the Hubble Space Telescope (HST). We have...
The Globular Cluster System in the Inner Region of the Giant Elliptical Galaxy NGC 4472 (2000)
Lee, Myung Gyoon, Kim, Eunhyeuk
We present a study of globular clusters in the inner region of the giant elliptical galaxy NGC 4472, based on the HST WFPC2 archive data. We have found about 1560 globular cluster candidates at the...
Kim, Eunhyeuk, Lee, Myung Gyoon, Geisler, Doug
We present deep wide field (16'.4 x 16'.4) Washington CT1 CCD surface photometry of the giant elliptical galaxy NGC 4472, the brightest member in the Virgo cluster. Our data cover a wider field than...
Stellar Populations of the Sagittarius Dwarf Irregular Galaxy (1999)
Lee, Myung Gyoon, Kim, Sang Chul
We present deep BVRI CCD photometry of the stars in the dwarf irregular galaxy SagDIG. The color-magnitude diagrams of the measured stars in SagDIG show a blue plume which consists mostly of young...
Stellar Populations and the Local Group Membership of the Dwarf Galaxy DDO 210 (1999)
Lee, Myung Gyoon, Aparicio, Antonio, Tikonov, Nikolay, Byun, Yong-Ik, Kim, Eunhyeuk
We present deep BVI CCD photometry of the stars in the dwarf galaxy DDO 210. The color-magnitude diagrams of DDO 210 show a well-defined red giant branch (RGB) and a blue plume. The tip of the RGB is...
Stellar Populations of the Dwarf Galaxy UKS 2323--326 in the Sculptor Group (1999)
Lee, Myung Gyoon, Byun, Yong-Ik
We present deep BVRI CCD photometry of the stars in the dwarf irregular galaxy UKS 2323-326 in the Sculptor Group. The color-magnitude diagrams of the measured stars in UKS 2323-326 show a blue plume...
UBVI CCD photometry of two old open clusters NGC 1798 and NGC 2192 (1999)
Park, Hong Soo, Lee, Myung Gyoon
We present UBVI CCD photometry of two open clusters NGC 1798 and NGC 2192 which were little studied before. Color-magnitude diagrams of these clusters show several features typical for old open...
Surface Photometry of the Dwarf Elliptical Galaxies NGC 185 and NGC 205 (1998)
Kim, Sang Chul, Lee, Myung Gyoon
We present BVRI CCD surface photometry for the central (6'.35 X 6'.35) regions of the dwarf elliptical galaxies NGC 185 and NGC 205 in the Local Group. Surface brightness profiles of NGC 185 (R <...
Lee, Myung Gyoon, Kim, Eunhyeuk, Geisler, Doug
We present a comprehensive study of the luminosity function and spatial structure of the globular cluster system of NGC 4472, based on deep wide field Washington CT1 CCD images. The globular cluster...
Lee, Myung Gyoon, Kim, Eunhyeuk, Geisler, Doug
We present integrated Washington CT1 photometry of 18 bright blue objects discovered in the dwarf galaxy UGC 7636 which is located 5'.5 southeast of the giant elliptical galaxy NGC 4472, the...