Huang, Chih-Wei Locutus, Wu, Jiun-Huei Proty, Ho, Paul T. P., Koch, Patrick M., Liao, Yu-Wei, Lin, Kai-Yang, ...
We investigate the scaling relations between the X-ray and the thermal Sunyaev-Zel'dovich Effect (SZE) properties of clusters of galaxies, using data taken during 2007 by the Y.T. Lee Array for...
Platform Deformation Refined Pointing and Phase Correction for the AMiBA Hexapod Telescope (2009)
Koch, Patrick M., Kesteven, Michael, Chang, Yu-Yen, Huang, Yau-De, Raffin, Philippe, Chen, Ke-Yung, ...
The Array for Microwave Background Anisotropy (AMiBA) is a radio interferometer for research in cosmology, currently operating 7 0.6m diameter antennas co-mounted on a 6m diameter platform driven by...
Formation of an O-Star Cluster by Hierarchical Accretion in G20.08-0.14 N (2009)
Galván-Madrid, Roberto, Keto, Eric, Zhang, Qizhou, Kurtz, Stan, Rodríguez, Luis F., Ho, Paul T. P.
Spectral line and continuum observations of the ionized and molecular gas in G20.08-0.14 N explore the dynamics of accretion over a range of spatial scales in this massive star forming region. Very...
Evolutionary Status of Brightest and Youngest Source in the Orion Molecular Cloud-3 Region (2009)
Takahashi, Satoko, Ho, Paul T. P., Tang, Ya-Wen, Kawabe, Ryohei, Saito, Masao
The brightest continuum source in the Orion Molecular Cloud-3 region (OMC-3), MMS 6, was observed with the Very Large Array (VLA), the Nobeyama Millimeter Array (NMA), and the Submillimeter Array...
Explosive Disintegration of a Massive Young Stellar System in Orion (2009)
Zapata, Luis A., Schmid-Burgk, Johannes, Ho, Paul T. P., Rodriguez, Luis F., Menten, Karl
Young massive stars in the center of crowded star clusters are expected to undergo close dynamical encounters that could lead to energetic, explosive events. However, there has so far never been...
Tang, Ya-Wen, Ho, Paul T. P., Koch, Patrick M., Girart, Josep M., Lai, Shih-Ping, Rao, Ramprasad
We report our observational results of 870 $\mu$m continuum emission and its linear polarization in the massive star formation site W51 e2/e8. Inferred from the linear polarization maps, the magnetic...
Lee, Chin-Fei, Hirano, Naomi, Palau, Aina, Ho, Paul T. P., Bourke, Tyler L., Zhang, Qizhou, ...
HH 211 is a nearby young protostellar system with a highly collimated jet. We have mapped it in 352 GHz continuum, SiO (J=8-7), and HCO+ (J=4-3) emission at up to ~ 0.2" resolution with the...
A ring/disk/outflow system associated with W51 North: a very massive star in the making (2009)
Zapata, Luis A., Ho, Paul T. P., Schilke, Peter, Rodríguez, Luis F., Menten, Karl, Palau, Aina, ...
Sensitive and high angular resolution ($\sim$ 0.4\arcsec) SO$_2$[22$_{2,20}$ $\to$ 22$_{1,21}$] and SiO[5$\to$4] line and 1.3 and 7 mm continuum observations made with the Submillimeter Array (SMA)...
Gas infall towards Sgr A* from the clumpy circumnuclear disk (2009)
Montero-Castaño, María, Herrnstein, Robeson M., Ho, Paul T. P.
We present the first large-scale mosaic performed with the Submillimeter Array (SMA) in the Galactic center. We have produced a 25-pointing mosaic, covering a ~2' x 2' area around Sgr A*. We have...
AMiBA: Broadband Heterodyne CMB Interferometry (2009)
Chen, Ming-Tang, Li, Chao-Te, Hwang, Yuh-Jing, Jiang, Homin, Altamirano, Pablo, Chang, Chia-Hao, ...
The Y. T. Lee Array for Microwave Background (AMiBA) has reported the first science results on the detection of galaxy clusters via the Sunyaev Zel'dovich effect. The science objectives required...
AMiBA: System Performance (2009)
Lin, Kai-Yang, Li, Chao-Te, Ho, Paul T. P., Huang, Chih-Wei Locutus, Liao, Yu-Wei, Liu, Guo-Chin, ...
The Y.T. Lee Array for Microwave Background Anisotropy (AMiBA) started scientific operation in early 2007. This work describes the optimization of the system performance for the measurements of the...
The AMiBA Hexapod Telescope Mount (2009)
Koch, Patrick M., Kesteven, Michael, Nishioka, Hiroaki, Jiang, Homin, Lin, Kai-Yang, Umetsu, Keiichi, ...
AMiBA is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components -- the support cone, universal...
Tang, Ya-Wen, Ho, Paul T. P., Girart, Josep Miquel, Rao, Ramprasad, Koch, Patrick, Lai, Shih-Ping
We report high angular resolution (3") Submillimeter Array (SMA) observations of the molecular cloud associated with the Ultra-Compact HII region G5.89-0.39. Imaged dust continuum emission at 870...
Tests of AMiBA Data Integrity (2008)
Nishioka, Hiroaki, Wang, Fu-Cheng, Wu, Jiun-Huei Proty, Ho, Paul T. P., Huang, Chih-Wei Locutus, Koch, Patrick M., ...
We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich effect and the...
Resolving the Structure and Kinematics of the BN Object at $0\rlap.{"}2$ Resolution (2008)
Rodr{\'\i}guez, Luis F., Zapata, Luis A., Ho, Paul T. P.
We present sensitive 7 mm observations of the H53$\alpha$ recombination line and adjacent continuum, made toward the Orion BN/KL region. In the continuum we detect the BN object, the radio source I...
First Confirmed Detection of a Bipolar Molecular Outflow from a Young Brown Dwarf (2008)
Phan-Bao, Ngoc, Riaz, Basmah, Lee, Chin-Fei, Tang, Ya-Wen, Ho, Paul T. P., Martin, Eduardo L., ...
Studying the earliest stages in the birth of stars is crucial for understanding how they form. Brown dwarfs with masses between that of stars and planets are not massive enough to maintain stable...
The Yuan-Tseh Lee Array for Microwave Background Anisotropy (2008)
Ho, Paul T. P., Altamirano, Pablo, Chang, Chia-Hao, Chang, Shu-Hao, Chang, Su-Wei, Chen, Chung-Cheng, ...
The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is the first interferometer dedicated to studying the cosmic microwave background (CMB) radiation at 3mm wavelength. The choice of...
Umetsu, Keiichi, Birkinshaw, Mark, Liu, Guo-Chin, Wu, Jiun-Huei Proty, Medezinski, Elinor, Broadhurst, Tom, ...
We present a multiwavelength analysis of a sample of four hot (T_X>8keV) X-ray galaxy clusters (A1689, A2261, A2142, and A2390) using joint AMiBA Sunyaev-Zel'dovich effect (SZE) and Subaru weak...
Sakamoto, Kazushi, Wang, Junzhi, Wiedner, Martina C., Wang, Zhong, Peck, Alison B., Zhang, Qizhou, ...
We used the Submillimeter Array (SMA) to image 860 micron continuum and CO(3-2) line emission in the ultraluminous merging galaxy Arp 220, achieving a resolution of 0.23" (80 pc) for the continuum...
Millimeter Imaging of HH 24 MMS: A Misaligned Protobinary System (2008)
Kang, Miju, Choi, Minho, Ho, Paul T. P., Lee, Youngung
The HH 24 MMS protostellar system was observed in the 6.9 mm continuum with a high angular resolution (0.5"). HH 24 MMS was resolved into two sources. The separation between sources 1 and 2 is ~0.9"...
Prevalence of Tidal Interactions among Local Seyfert Galaxies: The Control Experiment (2008)
Tang, Ya-Wen, Kuo, Cheng-Yu, Lim, Jeremy, Ho, Paul T. P.
We test whether there is a relation between the observed tidal interactions and Seyfert activity by imaging in HI twenty inactive galaxies at the same spatial resolution and detection threshold as...
Prevalence of Tidal Interactions among Local Seyfert Galaxies (2008)
Kuo, Cheng-Yu, Lim, Jeremy, Tang, Ya-Wen, Ho, Paul T. P.
No mechanisms have hitherto been conclusively demonstrated to be responsible for initiating optically-luminous nuclear (Seyfert) activity in local disk galaxies. Only a small minority of such...
Time Variation in G24.78+0.08 A1: Evidence for an Accreting Hypercompact H II Region? (2008)
Galván-Madrid, Roberto, Rodríguez, Luis F., Ho, Paul T. P., Keto, Eric
Over a timescale of a few years, an observed change in the optically thick radio continuum flux can indicate whether an unresolved H II region around a newly formed massive star is changing in size....
The CO Molecular Outflows of IRAS 16293-2422 Probed by the Submillimeter Array (2007)
Yeh, Sherry C. C., Hirano, Naomi, Bourke, Tyler L., Ho, Paul T. P., Lee, Chin-Fei, Ohashi, Nagayoshi, ...
We have mapped the proto-binary source IRAS 16293-2422 in CO 2-1, 13CO 2-1, and CO 3-2 with the Submillimeter Array (SMA). The maps with resolution of 1".5-5" reveal a single small scale (~3000 AU)...
Lee, Sungho, Pak, Soojong, Choi, Minho, Davis, Christopher J., Geballe, T. R., Herrnstein, Robeson M., ...
We have obtained velocity-resolved spectra of the H_2 v=1-0 S(1) (lambda = 2.1218 micron) emission line at 2 arcsec angular resolution (or 0.08 pc spatial resolution) in four regions within the...
Unveiling the nature and interaction of the intermediate/high-mass YSOs in IRAS 20343+4129 (2007)
Palau, Aina, Estalella, Robert, Ho, Paul T. P., Beuther, Henrik, Beltrán, Maria T.
In order to elucidate the nature of the brightest infrared sources associated with IRAS 20343+4129, IRS1 and IRS3, we observed with the Submillimeter Array (SMA) the 1.3 mm continuum and CO(2-1)...
Loinard, Laurent, Chandler, Claire J., Rodriguez, Luis F., D'Alessio, Paola, Brogan, Crystal L., Wilner, David J., ...
In this article, we report high-resolution (~ 0.1" -- 0.3"), high-sensitivity (~ 50 -100 uJy beam-1) Very Large Array 0.7 and 1.3 cm observations of the young stellar system IRAS 16293-2422 in...
An evolved disk surrounding the massive main sequence star MWC 297? (2007)
Manoj, P., Ho, Paul T. P., Ohashi, Nagayoshi, Zhang, Qizhou, Hasegawa, T., Chen, Huei-Ru, ...
We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the (J=2-1) rotational transitions of...
Submillimeter arcsecond-resolution mapping of the highly collimated protostellar jet HH 211 (2007)
Lee, Chin-Fei, Ho, Paul T. P., Palau, Aina, Hirano, Naomi, Bourke, Tyler L., Shang, Hsien, ...
We have mapped the protostellar jet HH 211 in 342 GHz continuum, SiO ($J=8-7$), and CO ($J=3-2$) emission at $\sim$ \arcs{1} resolution with the Submillimeter Array (SMA). Thermal dust emission is...
Circumbinary Molecular Rings Around Young Stars in Orion (2007)
Zapata, Luis A., Ho, Paul T. P., Rodriguez, Luis F., Schilke, Peter, Kurtz, Stan
We present high angular resolution 1.3 mm continuum, methyl cyanide molecular line, and 7 mm continuum observations made with the Submillimeter Array and the Very Large Array, toward the most highly...
Star formation in a clustered environment around the UCHII region in IRAS 20293+3952 (2007)
Palau, Aina, Estalella, Robert, Girart, J. Miquel, Ho, Paul T. P., Zhang, Qizhou, Beuther, Henrik
We aim at studying the cluster environment surrounding the UCHII region in IRAS 20293+3952, a region in the first stages of formation of a cluster around a high-mass star. BIMA and VLA were used to...
HH 212: SMA Observations of a Remarkable Protostellar Jet (2007)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Hirano, Naomi, Shang, Hsien, ...
HH 212 is a nearby (460 pc) protostellar jet discovered in H$_2$ powered by a Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. It is highly collimated and symmetric with matched pairs of...
HH 212: Submillimeter Array observations of a remarkable protostellar jet (2007)
Lee, Chin-Fei, Ho, Paul T. P., Hirano, Naomi, Beuther, Henrik, Bourke, Tyler L., Shang, Hsien, ...
HH 212 is a nearby (460 pc) protostellar jet discovered in H2 powered by a Class 0 source, IRAS 05413-0104. We have mapped it in 850 mum continuum, SiO(J=8-7), CO(J=3-2), SO(NJ=89-78), HCO+(J=4-3),...
Compact Centimeter and Millimeter Sources in NGC 6334 I(N): OB Stars in the Making? (2006)
Rodriguez, Luis F., Zapata, Luis A., Ho, Paul T. P.
We present sensitive, high angular resolution 1.3 cm and 7 mm observations of the massive core NGC 6334 I(N), a region known to be undergoing massive star formation. At 1.3 cm we detect three...
Radio Continuum Sources Associated with AB Aur (2006)
Rodriguez, Luis F., Zapata, Luis, Ho, Paul T. P.
We present high angular resolution, high-sensitivity Very Large Array observations at 3.6 cm of the Herbig Ae star AB Aur. This star is of interest since its circumstellar disk exhibits...
654 GHz Continuum and C18O (6-5) Observations of G240.31+0.07 with the Submillimeter Array (2006)
Chen, Huei-Ru, Su, Yu-Nung, Liu, Sheng-Yuan, Hunter, Todd R., Wilner, David J., Zhang, Qizhou, ...
We report a dual-band observation at 223 and 654 GHz (460 micron) toward an ultracompact (UC) HII region, G240.31+0.07, with the Submillimeter Array. With a beam size of 1"5 X 0"8, the dust continuum...
Sakamoto, Kazushi, Ho, Paul T. P., Mao, Rui-Qing, Matsushita, Satoki, Peck, Alison B.
We have used the Submillimeter Array for the first interferometric CO imaging toward the starburst-Seyfert nucleus of the southern barred spiral galaxy NGC 1365, which is one of the four galaxies...
High Resolution Radio Maps of Four Nearby Spiral Galaxies (2006)
Tsai, Chao-Wei, Turner, Jean L., Beck, Sara C., Crosthwaite, Lucian P., Ho, Paul T. P., Meier, David S., ...
We report subarcsecond-resolution VLA imaging of the centers of four nearby spiral galaxies: IC 342, Maffei II, NGC 2903, and NGC 6946. In each galaxy, 7 - 12 compact radio continuum sources were...
Subarcsecond-Resolution Radio Maps of Nearby Spiral Galaxies (2006)
Tsai, Chao-Wei, Turner, Jean L., Beck, Sara C., Crosthwaite, Lucian P., Ho, Paul T. P., Meier, David S., ...
We report subarcsecond-resolution VLA imaging of four nearby spiral galaxies: IC 342, Maffei II, NGC 2903, and NGC 6946. In each galaxy, compact radio continuum sources are identified in the central...
Zapata, Luis A., Ho, Paul T. P., Rodriguez, Luis F., O'Dell, C. R., Zhang, Qizhou, Muench, August
We present high angular resolution ($2\rlap.{''}8 \times 1\rlap.{''}7$) SiO J=5$\to$4; $v=0$ line observations of the OMC1S region in the Orion Nebula made using the Submillimeter Array (SMA). We...
Hot Molecular Gas in the Nuclear Region of IC 342 (2006)
Montero-Castano, Maria, Herrnstein, Robeson M., Ho, Paul T. P.
We present the first interferometric detection of extragalactic NH_3(6,6) emission in the nearby galaxy IC 342 made using the VLA. The data have a resolution of 7.8''x 5.0'' and trace hot (T ~ 412 K)...
Exploring High-Velocity NH_3(6,6) Emission at the Center of our Galaxy (2006)
Donovan, Jennifer L., Herrnstein, Robeson M., Ho, Paul T. P.
Using the NH\3 (6,6) transition, which samples dense ($\sim 10^{5}$) molecular gas with an energy above ground of 412 K, we find hot gas at high velocities (--142 to --210 km s$^{-1}$) associated...
Possible Molecular Spiral Arms in the Protoplanetary Disk of AB Aur (2006)
Lin, Shin-Yi, Ohashi, Nagayoshi, Lim, Jeremy, Ho, Paul T. P., Fukagawa, Misato, Tamura, Motohide
The circumstellar dust disk of the Herbig Ae star AB Aur has been found to exhibit complex spiral-like structures in the near-IR image obtained with the Subaru Telescope. We present maps of the disk...
Sakamoto, Kazushi, Ho, Paul T. P., Peck, Alison B.
Molecular gas in the merging starburst galaxy NGC 3256 has been imaged with the Submillimeter Array at a resolution of 1'' x 2'' (170 x 340 pc at 35 Mpc). This is the first interferometric imaging of...
In search of circumstellar disks around young massive stars (2006)
Zapata, Luis A., Rodríguez, Luis F., Ho, Paul T. P., Beuther, Henrik, Zhang, Qizhou
We present 7 mm, 1.3 cm, and 3.6 cm continuum observations made with the Very Large Array toward a sample of 10 luminous IRAS sources that are believed to be regions of massive star formation. We...
Infall and outflow around the HH 212 protostellar system (2006)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Zhang, Qizhou, Hirano, Naomi, ...
HH 212 is a highly collimated jet discovered in H2 powered by a young Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. We have mapped around it in 1.33 mm continuum, 12CO (J=2-1), 13CO...
A size of ~1 AU for the radio source Sgr A* at the centre of the Milky Way (2005)
Shen, Zhi-Qiang, Lo, K. Y., Ho, Paul T. P.
Although it is widely accepted that most galaxies have supermassive black holes (SMBHs) at their centers^{1-3}, concrete proof has proved elusive. Sagittarius A* (Sgr A*)^4, an extremely compact...
SiO J=5--4 in the HH211 Protostellar Jet Imaged with the SMA (2005)
Hirano, Naomi, Liu, Sheng-Yuan, Shang, Hsien, Ho, Paul T. P., Huang, Hui-Chun, Kuan, Yi-Jehng, ...
We have mapped the SiO J=5-4 line at 217GHz from the HH211 molecular outflow with the Submillimeter Array (SMA). The high resolution map (1.6''x0.9'') shows that the SiO J=5-4 emission comes from the...
Infall and Outflow around the HH 212 protostellar system (2005)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Zhang, Qizhou, Hirano, Naomi, ...
HH 212 is a highly collimated jet discovered in H2 powered by a young Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. We have mapped around it in 1.33 mm continuum, 12CO ($J=2-1$), 13CO...
A disk of dust and molecular gas around a high-mass protostar (2005)
Patel, Nimesh A., Curiel, Salvador, Sridharan, T. K., Zhang, Qizhou, Hunter, Todd R., Ho, Paul T. P., ...
The processes leading to the birth of low-mass stars such as our Sun have been well studied, but the formation of high-mass (> 8 x Sun's mass) stars has heretofore remained poorly understood. Recent...
Molecular Superbubbles in the Starburst Galaxy NGC 253 (2005)
Sakamoto, Kazushi, Ho, Paul T. P., Iono, Daisuke, Keto, Eric R., Mao, Rui-Qing, Matsushita, Satoki, ...
The central 2x1 kpc of the starburst galaxy NGC 253 has been imaged using the Submillimeter Array at a 60 pc resolution in the J=2-1 transitions of 12CO, 13CO, and C18O as well as in the 1.3 mm...
The Molecular Accretion Flow in G10.6-0.4 (2005)
Sollins, Peter K., Ho, Paul T. P
We have observed the ultracompact HII region G10.6-0.4 with the VLA in 23 GHz continuum and the NH3(3,3) inversion line. By analyzing the optical depth of the line as well as the kinematics, we have...
An Infalling Torus of Molecular Gas Around the Ultra-Compact HII Region G28.20-0.05 (2005)
Sollins, Peter K., Zhang, Qizhou, Keto, Eric, Ho, Paul T. P
We present new observations of the ultra-compact HII region G28.20-0.05 in 23 GHz continuum, and the NH3(1,1), NH3(2.2), and NH3(3,3) lines. To explain the complicated kinematics of the molecular...
A Highly Collimated, Young and Fast CO(2-1) Outflow in OMC1 South (2005)
Zapata, Luis A., Rodriguez, Luis F., Ho, Paul T. P., Zhang, Qizhou, Qi, Chunhua, Kurtz, S. E.
We present high angular resolution (~ 1''), sensitive CO(2-1) line observations of the region OMC1 South in the Orion Nebula made using the Submillimeter Array (SMA). We detect the CO(2-1) high...
IRAS 16293-2442B: A Compact, Possibly Isolated Protoplanetary Disk in a Class 0 Object (2005)
Rodriguez, Luis F., Loinard, Laurent, D'Alessio, Paola, Wilner, David J., Ho, Paul T. P.
Theoretical arguments suggest that protoplanetary disks around young stars should start small and grow with the addition of high angular momentum material to reach the radii of several hundred AUs...
Atomic and Molecular Gas in Colliding Galaxy Systems: I. The Data (2005)
Iono, Daisuke, Yun, Min S., Ho, Paul T. P.
We present HI and CO(1-0) interferometric observations of 10 comparable-mass interacting systems obtained at the Very Large Array (VLA) and the Owens Valley Radio Observatory (OVRO) millimeter array....
Spherical Infall in G10.6-0.4: Accretion Through an Ultracompact HII Region (2004)
Sollins, Peter K., Zhang, Qizhou, Keto, Eric, Ho, Paul T. P
We present high resolution (0.''12 x 0.''079) observations of the ultracompact HII region G10.6-0.4 in 23 GHz radio continuum and the NH3(3,3) line. Our data show that the infall in the molecular...
Shinnaga, Hiroko, Moran, James M., Young, Ken H., Ho, Paul T. P.
We used the Submillimeter Array to image the SiO maser emission in the $v=1$, \$J=5-4$ transition associated with the peculiar red supergiant VY Canis Majoris. We identified seven maser components...
The Dense Molecular Cores in the IRAS 21391+5802 region (2004)
Beltran, Maria T., Girart, Josep M., Estalella, Robert, Ho, Paul T. P.
We present a detailed kinematical study and modeling of the emission of the molecular cores at ambient velocities surrounding IRAS 21391+5802, an intermediate-mass protostar embedded in IC 1396N. The...
A Cluster of 1.3 cm Continuum Sources in OMC1 South (2004)
Zapata, Luis A., Rodriguez, Luis F., Kurtz, Stanley E., O'Dell, C. R., Ho, Paul T. P.
We present sensitive 1.3 cm radio continuum observations of the region OMC1 South (OMC-1S) in Orion using the Very Large Array in its B configuration. We detect eleven radio sources clustered in a...
The Submillimeter Array (2004)
Ho, Paul T. P., Moran, James M., Lo, Kwok Yung
The Submillimeter Array (SMA), a collaborative project of the Smithsonian Astrophysical Observatory (SAO) and the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), has begun operation...
Warm molecular gas in galaxy-galaxy merger NGC6090 (2004)
Wang, Junzhi, Zhang, Qizhou, Wang, Zhong, Ho, Paul T. P., Fazio, Giovanni G., Wu, Yuefang
We present observations of the CO 2-1 and 3-2 transitions toward the merging galaxies of NGC6090 with the Submillimeter Array (SMA) (The Submillimeter Array (SMA) is a joint project between the...
Submillimeter Array Observations of L1551 IRS 5 in CS (J=7-6) (2004)
Takakuwa, Shigehisa, Ohashi, Nagayoshi, Ho, Paul T. P., Qi, Chunhua, Wilner, David J., Zhang, Qizhou, ...
We have imaged the circumstellar envelope around the binary protostar L1551 IRS 5 in CS (J=7-6) and 343 GHz continuum emission at ~ 3 arcsec resolution using the Submillimeter Array. The continuum...
High Density Molecular Gas in the IR-bright Galaxy System VV114 (2004)
Iono, Daisuke, Ho, Paul T. P., Yun, Min S., Matsushita, Satoki, Peck, Alison B., Sakamoto, Kazushi
New high resolution CO(3-2) interferometric map of the IR-bright interacting galaxy system VV114 observed with the Submillimeter Array (SMA) reveal a substantial amount of warm and dense gas in the...
A Single Circumstellar Disk in the SVS 13 Close Binary System (2004)
Anglada, Guillem, Rodriguez, Luis F., Osorio, Mayra, Torrelles, Jose M., Estalella, Robert, Beltran, Maria T., ...
We present Very Large Array observations at 7 mm of the sources IRAS 2A, IRAS 2B, MMS2, MMS3 and SVS 13, in the NGC1333 region. SVS 13 is a young close binary system whose components are separated by...
Hot Molecular Gas in the Central 10 Parsecs of the Galaxy (2003)
Herrnstein, Robeson M., Ho, Paul T. P.
We present results from observations of NH_3(1,1), (2,2), (3,3), and (6,6) with the Very Large Array. The data sample the inner 10 pc (4') of the Galaxy and have a velocity coverage of -140 to +130...
Interaction between the Northeastern Boundary of Sgr A East and Giant Molecular Clouds (2002)
Lee, Sungho, Pak, Soojong, Davis, Christopher J., Herrnstein, Robeson M., Geballe, T. R., Ho, Paul T. P., ...
We have detected the v=1-0 S(1) (2.1218 um) and v=2-1 S(1) (2.2477 um) lines of H_2 in the Galactic centre, in a 90 x 27 arcsec region between the northeastern boundary of the non-thermal source, Sgr...
Hot Molecular Gas in the Galactic Center (2002)
Herrnstein, Robeson McGary, Ho, Paul T. P.
Using the new 23 GHz receivers at the Very Large Array (VLA), we have detected NH3(6,6) emission (nu=25.056025 GHz) from hot (>150 K) molecular clouds in the central 10 pc of the Galaxy. This is the...
McGary, Robeson S., Ho, Paul T. P.
The 23 GHz emission lines from the NH3 rotation inversion transitions are widely used to investigate the kinematics and physical conditions in dense molecular clouds. The line profile is composed of...
IRAS 21391+5802: The Molecular Outflow and its Exciting Source (2002)
Beltran, Maria T., Girart, Jose M., Estalella, Robert, Ho, Paul T. P., Palau, Aina
We present centimeter and millimeter observations of gas and dust around IRAS 21391+5802, an intermediate-mass source embedded in the core of IC 1396N. Continuum observations from 3.6 cm to 1.2 mm...
McGary, Robeson S., Coil, Alison L., Ho, Paul T. P.
New VLA images of NH3 (1,1), (2,2), and (3,3) emission in the central 10 parsecs of the Galaxy trace filamentary streams of gas, several of which appear to feed the circumnuclear disk (CND). The NH3...
Molecular Tracers of the Central 12 pc of the Galactic Center (2000)
Wright, Melvyn C. H., Coil, Alison L., McGary, Robeson S., Ho, Paul T. P., Harris, Andrew I.
We have used the BIMA array to image the Galactic Center with a 19-pointing mosaic in HCN(1-0), HCO+(1-0), and H 42-alpha emission with 5 km/s velocity resolution and 13'' x 4'' angular resolution....
A Radio Telescope Search for Axions (2000)
Blout, B. D., Daw, E. J., Decowski, M. P., Ho, Paul T. P., Rosenberg, L. J, Yu, D. B.
The axion is a hypothetical elementary particle and a cold dark matter candidate. It could dominate potential wells of most astrophysical objects. Axions spontaneously decay into nearly monochromatic...
Infalling Gas Towards the Galactic Center (1998)
Coil, Alison L., Ho, Paul T. P.
VLA maps of ammonia emission were made for the Galactic Center region. The NH3(1,1) and NH3(2,2) transitions were observed in three 2' x 2' fields covering Sgr A* and the region 3' immediately south...
Radiative Transfer Modelling of the Accretion Flow onto a Star-Forming Core in W51 (1998)
Young, Lisa M., Keto, Eric, Ho, Paul T. P.
We present an analysis of the temperature, density, and velocity of the molecular gas in the star-forming core around W51 e2. A previous paper (Ho and Young 1996) describes the kinematic evidence...