Mark Morris

Understanding Mass-Loss and the late Evolution of Intermediate Mass Stars: Jets, Disks, Binarity, Dust and Magnetic Fields (2009)

Sahai, Raghvendra, Balick, Bruce, Blackman, Eric, Kastner, Joel, Claussen, Mark, Morris, Mark, ...

Almost all stars in the 1-8 Msun range evolve through the Asymptotic Giant Branch (AGB), preplanetary nebula (PPN) and planetary nebula (PN) evolutionary phases. Most stars that leave the main...

Diurnal variation of the human adipose transcriptome and the link to metabolic disease (2009)

Loboda, Andrey, Kraft, Walter K, Fine, Bernard, Joseph, Jeffrey, Nebozhyn, Michael, Zhang, Chunsheng, ...

Abstract Background Circadian (diurnal) rhythm is an integral part of the physiology of the body; specifically, sleep, feeding behavior and metabolism are tightly linked to the light-dark cycle...

Diurnal variation of the human adipose transcriptome and the link to metabolic disease. (2009)

Loboda, Andrey, Kraft, Walter K., Fine, Bernard, Joseph, Jeffrey, Nebozhyn, Michael, Zhang, Chunsheng, ...

ABSTRACT: BACKGROUND: Circadian (diurnal) rhythm is an integral part of the physiology of the body; specifically, sleep, feeding behavior and metabolism are tightly linked to the light-dark cycle...

Combining AI Methods for Learning Bots in a Real-Time Strategy Game (2009)

Robin Baumgarten, Simon Colton, Mark Morris

We describe an approach for simulating human game-play in strategy games using a variety of AI techniques, including simulated annealing, decision tree learning, and case-based reasoning. We have...

High-velocity interstellar bullets in IRAS 05506+2414 : a very young protostar (2008)

Sahai, Raghvendra, Claussen, Mark, Sánchez Contreras, Carmen, Morris, Mark, Sarkar, Geetanjali

We have made a serendipitous discovery of an enigmatic outflow source, IRAS 05506+2414 (hereafter IRAS 05506), as part of a multiwavelength survey of pre-planetary nebulae (PPNs). The HST optical and...

Preplanetary nebulae : a Hubble Space Telescope imaging survey and a new morphological classification system (2008)

Sahai, Raghvendra, Morris, Mark, Sanchez Contreras, Carmen, Claussen, Mark

Using the Hubble Space Telescope (HST ), we have carried out a survey of candidate preplanetary nebulae (PPNs). We report here our discoveries of objects having well-resolved geometric structures,...

X-ray emission from the pre–planetary Nebula Henize 3-1475 (2008)

Sahai, Raghvendra, Kastner, Joel H., Frank, Adam, Morris, Mark, Blackman, Eric G.

We report the first detection of X-ray emission in a pre–planetary nebula, He 3-1475. Pre–planetary nebulae are rare objects in the short transition stage between the asymptotic giant branch...

A Starfish preplanetary nebula : IRAS 19024+0044 (2008)

Sahai, Raghvendra, Sanchez Contreras, Carmen, Morris, Mark

Using the Hubble Space Telescope, we have imaged the OH/IR star IRAS 19024+0044 (I19024) at 0.6, 0.8, 1.1, and 1.6 µm, as part of our surveys of candidate preplanetary nebulae. The images show a...

High-Velocity Interstellar Bullets in IRAS05506+2414: A Very Young Protostar (2008)

Sahai, Raghvendra, Claussen, Mark, Contreras, Carmen Sánchez, Morris, Mark, Sarkar, Geetanjali

We have made a serendipitous discovery of an enigmatic outflow source, IRAS 05506+2414 (hereafter IRAS 05506), as part of a multi-wavelength survey of pre-planetary nebulae (PPNs). The HST optical...

Combining AI Methods for Learning Bots in a Real-Time Strategy Game (2008)

Robin Baumgarten, Simon Colton, Mark Morris

We describe an approach for simulating human game-play in strategy games using a variety of AI techniques, including simulated annealing, decision tree learning, and case-based reasoning. We have...

Preplanetary Nebulae: An HST Imaging Survey and a New Morphological Classification System (2007)

Sahai, Raghvendra, Morris, Mark, Contreras, Carmen Sánchez, Claussen, Mark

Using the Hubble Space Telescope (HST), we have carried out a survey of candidate preplanetary nebulae (PPNs). We report here our discoveries of objects having well-resolved geometrical structures,...

The spatio-kinematical structure and distance of the pre-planetary nebula IRAS 19134+2131 (2007)

Imai, Hiroshi, Sahai, Raghvendra, Morris, Mark

Using the VLBA, we have observed H2O maser emission in the pre-planetary nebula IRAS 19134+2131(I19134), in which the H2O maser spectrum has two groups of emission features separated in radial...

A Spitzer Study of the Mass Loss Histories of Three Bipolar Pre-Planetary Nebulae (2007)

Do, Tuan, Morris, Mark, Sahai, Raghvendra, Stapelfeldt, Karl

We present the results of far-infrared imaging of extended regions around three bipolar pre-planetary nebulae, AFGL 2688, OH 231.8+4.2, and IRAS 16342$-$3814, at 70 and 160 $\mu$m with the MIPS...

The proper motion of the Arches cluster with Keck Laser-Guide Star Adaptive Optics (2007)

Stolte, Andrea, Ghez, Andrea M., Morris, Mark, Lu, Jessica R., Brandner, Wolfgang, Matthews, Keith

We present the first measurement of the proper motion of the young, compact Arches cluster near the Galactic center from near-infrared adaptive optics (AO) data taken with the recently commissioned...

Discovery of hot supergiant stars near the galactic center (2007)

Mauerhan, Jon C., Muno, Michael P., Morris, Mark

We report new results of a campaign to find Wolf-Rayet and O (WR/O) stars and high-mass X-ray binaries (HMXBs) in the Galactic center. We searched for candidates by cross-correlating the Two Micron...

Discovery of hot supergiant stars near the Galactic center (2007)

Mauerhan, Jon C., Muno, Michael P., Morris, Mark

We report new results of a campaign to find Wolf-Rayet and O (WR/O) stars and high-mass X-ray binaries (HMXBs) in the Galactic center. We searched for candidates by cross-correlating the 2MASS...

News from the year 2006 Galactic Center workshop (2007)

Morris, Mark, Nayakshin, Sergei

We summarize some of the new results from contributions made to the Galactic Centre Workshop that took place in Bad Honnef, Germany, on April 18-22, 2006.

The Galactic Center Magnetosphere (2007)

Morris, Mark

The magnetic field within a few hundred parsecs of the center of the Galaxy is an essential component of any description of that region. The field has several pronounced observational manifestations:...

Silicate Emission Profiles from Low-Mass Protostellar Disks in the Orion Nebula: Evidence for Growth and Thermal Processing of Grains (2006)

Shuping, R. Y., Kassis, Marc, Morris, Mark, Smith, Nathan, Bally, John

We present 8--13 micron low resolution spectra (R~100) of 8 low-mass protostellar objects ("proplyds") in the Orion Nebula using the Long Wavelength Spectrometer (LWS) at the W. M. Keck Observatory....

The Double Helix Nebula: a magnetic torsional wave propagating out of the Galactic centre (2005)

Morris, Mark, Uchida, Keven, Do, Tuan

Radioastronomical studies have indicated that the magnetic field in the central few hundred parsecs of our Milky Way Galaxy has a dipolar geometry and a strength substantially larger than elsewhere...

High Spectral Resolution Observations of the Massive Stars in the Galactic Center (2005)

Tanner, Angelle, Figer, Donald F., Najarro, Paco, Kudritzki, Rolf P., Gilmore, Diane, Morris, Mark, ...

We present high-resolution near-infrared spectra, obtained with the NIRSPEC spectrograph on the W. M. Keck II Telescope, of a collection of hot, massive stars within the central 25 arcseconds of the...

Thermal Dust Emission from Proplyds, Unresolved Disks, and Shocks in the Orion Nebula (2005)

Smith, Nathan, Bally, John, Shuping, Ralph Y., Morris, Mark, Kassis, Marc

We present a new 11.7 micron mosaic image of the Orion nebula obtained with T-ReCS on Gemini South. The map includes the BN/KL region, the Trapezium, and OMC-1 South. Excluding BN/KL, we detect 91...

A Candidate Neutron Star Associated with Galactic Center Supernova Remnant Sagittarius A East (2005)

Park, Sangwook, Muno, Michael P., Baganoff, Frederick K., Maeda, Yoshitomo, Morris, Mark, Chartas, George, ...

We present imaging and spectral studies of the supernova remnant (SNR) Sagittarius (Sgr) A East from deep observations with the {\it Chandra X-Ray Observatory}. The spatially-resolved spectral...

Intra-day Variability of Sagittarius A* at 3 Millimeters (2005)

Mauerhan, Jon C., Morris, Mark, Walter, Fabian, Baganoff, Frederick K.

We report observations and analysis of flux monitoring of Sagittarius A* at 3-mm wavelength using the OVRO millimeter interferometer over a period of eight days (2002 May 23-30). Frequent phase and...

Intraday variability of Sagittarius A* at 3 millimeters (2005)

Mauerhan, Jon C., Morris, Mark, Walter, Fabian, Baganoff, Frederick K.

We report observations and analysis of flux monitoring of Sagittarius A* at 3 mm wavelength using the Owens Valley Radio Observatory millimeter interferometer over a period of 8 days (2002 May...

350 micron Galactic Center Dust Observations with SHARC II (2004)

Staguhn, Johannes, Benford, Dominic, Morris, Mark, Uchida, Keven

We present first and preliminary submillimeter continuum images of the Galactic Center region obtained with the new Caltech Submillimeter Observatory facility camera SHARC II. The instrument allows...

Thermal-IR Detection of Optical Outflow Sources in OMC1 South (2004)

Smith, Nathan, Bally, John, Shuping, Ralph Y., Morris, Mark, Hayward, Thomas L.

We present the first thermal-infrared imaging photometry for several embedded sources in the OMC1 South cloud core in the Orion nebula, and propose that some of these drive optical Herbig-Haro jets...

Kinematic and structural analysis of the Minispiral in the Galactic Center from BEAR spectro-imagery (2004)

Paumard, Thibaut, Maillard, Jean-Pierre, Morris, Mark

Integral field spectroscopy of the inner region of the Galactic Center, over a field of roughly 40"x40" was obtained at 2.06 microns (He I) and 2.16 microns (Brackett-gamma) using BEAR, an imaging...

Dynamical Friction of Galactic Center Star Clusters with an Intermediate-Mass Black Hole (2004)

Kim, Sungsoo S., Figer, Donald F., Morris, Mark

Numerical simulations of the dynamical friction suffered by a Galactic center star cluster harboring an intermediate-mass black hole (IMBH) have been performed. Gerhard has suggested that dynamical...

A new mid-infrared map of the BN/KL region using the Keck telescope (2004)

Shuping, R. Y., Morris, Mark, Bally, John

We present a new mid-infrared (12.5micron) map of the BN/KL high-mass star-forming complex in Orion using the LWS instrument at Keck I. Despite poor weather we achieved nearly diffraction-limited...

X-Ray Emission from the Pre-Planetary Nebula Henize 3-1475 (2003)

Sahai, Raghvendra, Kastner, Joel H., Frank, Adam, Morris, Mark, Blackman, Eric G.

We report the first detection of X-ray emission in a pre-planetary nebula, Hen 3-1475. Pre-planetary nebulae are rare objects in the short transition stage between the Asymptotic Giant Branch and...

Characteristics of Diffuse X-Ray Line Emission within 20 pc of the Galactic Center (2003)

Park, Sangwook, Muno, Michael P., Baganoff, Frederick K., Maeda, Yoshitomo, Morris, Mark, Howard, Christian, ...

Over the last 3 yrs, the Galactic center (GC) region has been monitored with the Chandra X-Ray Observatory. With 11 Chandra observations through 2002 June, the total effective exposure reaches ~590...

An Extended Star Formation History for the Galactic Center from Hubble Space Telescope/NICMOS Observations (2003)

Figer, Donald F., Rich, R. Michael, Kim, Sungsoo S., Morris, Mark, Serabyn, Eugene

We present Hubble Space Telescope (HST) Near-Infrared Camera and Multiobject Spectrometer (NICMOS) observations as evidence that continuous star formation has created much of the central stellar cusp...

Dynamical Friction on Star Clusters near the Galactic Center (2003)

Kim, Sungsoo S., Morris, Mark

Numerical simulations of the dynamical friction suffered by a star cluster near the Galactic center have been performed with a parallelized tree code. Gerhard (2001) has suggested that dynamical...

Squeezars: Tidally powered stars orbiting a massive black hole (2003)

Alexander, Tal, Morris, Mark

We propose that there exists a class of transient sources, "squeezars", which are stars caught in highly eccentric orbits around a massive (m

The Molecular Counterpart of the Galactic Center Arched Filament HII Complex: OVRO Observations of the CS(2-1) Line (2002)

Lang, Cornelia C., Goss, W. M., Morris, Mark

The Owens Valley Radio Observatory (OVRO) millimeter array was used to make observations of the CS(2-1) line (at 97.981 GHz) arising from the G0.07+0.04 region of the ``-30 km/s'' molecular cloud...

Massive Stars in the Arches Cluster (2002)

Figer, Donald F., Najarro, Francisco, Gilmore, Diane, Morris, Mark, Kim, Sungsoo S., Serabyn, Eugene, ...

We present and use new spectra and narrow-band images, along with previously published broad-band images, of stars in the Arches cluster to extract photometry, astrometry, equivalent width, and...

Starburst clusters in galactic nuclei (2002)

Figer, Donald, Morris, Mark

Also archived in: arXiv:astro-ph/0012500 v2 28 Dec 2000 AND "Modes of Star Formation and the Origin of Field Star Populations", Proceedings of SESSION XI: "Properties of Nuclear Star Formation...

Starburst clusters in galactic nuclei (2002)

Figer, Donald, Morris, Mark

Also archived in: arXiv:astro-ph/0012500 v2 28 Dec 2000 AND "Modes of Star Formation and the Origin of Field Star Populations", Proceedings of SESSION XI: "Properties of Nuclear Star Formation...

Detection of H2O Maser Emission from Four Infrared Sources, (2002)

Morris,Mark, Knapp,Gillian R.

Maser emission from interstellar water vapor has been found towards four infrared sources: OMC-2, OH231.8+4.2 (also known as OH0739-14), S140-IR and Monoceros R2. Three of these new maser sources...

Spatial Diffusion of Stars in the Inner Galactic Bulge (2001)

Kim, Sungsoo S., Morris, Mark

Star formation in the inner few hundred pc of the Galactic bulge occurs in a flattened molecular layer called the central molecular zone (CMZ). Serabyn & Morris (1996) suggest that the star formation...

A VLA H92alpha Study of the Arched Filament Complex Near the Galactic Center (2001)

Lang, Cornelia C., Goss, W. M., Morris, Mark

The VLA has been used at 8.3 GHz in the DnC and CnB array configurations to carry out an H92alpha recombination line study (at 8.3 GHz) of the ionized gas in the Arched Filaments H II complex, which...

Starburst Clusters in Galactic Nuclei (2000)

Figer, Donald F., Morris, Mark

Galactic nuclei often harbor a disproportionately large amount of star formation activity with respect to their surrounding disks. Not coincidentally, the density of molecular material in galactic...

N-Body Simulations of Compact Young Clusters near the Galactic Center (2000)

Kim, Sungsoo S., Figer, Donald F., Lee, Hyung Mok, Morris, Mark

We investigate the dynamical evolution of compact young star clusters (CYCs) near the Galactic center (GC) using Aarseth's Nbody6 codes. The relatively small number of stars in the cluster...

2 micron Spectroscopy within 0.3 arcseconds of SgrA* (2000)

Figer, Donald F., Becklin, E. E., McLean, Ian S., Gilbert, Andrea M., Graham, James R., Larkin, James E., ...

We present moderate (R~$\approx$~2,700) and high resolution (R~$\approx$~22,000) 2.0$-$2.4 \micron\ spectroscopy of the central 0.1 square arcseconds of the Galaxy obtained with NIRSPEC, the facility...

Radio Detections of Stellar Winds from the Pistol Star and Other Stars in the Galactic Center Quintuplet Cluster (1999)

Lang, Cornelia C., Figer, Don F., Goss, W. M., Morris, Mark

VLA images of the Sickle and Pistol H II regions near the Galactic center at 3.6 and 6 cm reveal six point sources in the region where the dense Quintuplet stellar cluster is located. The spectral...

High Resolution Infrared Imaging and Spectroscopy of the Pistol Nebula: Evidence for Ejection (1999)

Figer, Donald F., Morris, Mark, Geballe, T. R., Rich, R. Michael, Serabyn, Eugene, McLean, Ian S., ...

We present new NICMOS/HST infrared images and CGS4/UKIRT Br-alpha (4.05 um) spectroscopy of the Pistol Star and its associated nebula, finding strong evidence to support the hypothesis that the...

A Radio Polarimetric Study of the Galactic Center Threads (1999)

Lang, Cornelia C., Morris, Mark, Echevarria, Luis

Multi-frequency, polarimetric VLA observations of the non-thermal filaments (NTF's), G0.08+0.15, and G359.96+0.09, also known as the Northern and Southern Threads are presented at 20, 6, 3.6 and 2...

HST/NICMOS Observations of Massive Stellar Clusters Near the Galactic Center (1999)

Figer, Donald F., Kim, Sungsoo S., Morris, Mark, Serabyn, Eugene, Rich, R. Michael, McLean, Ian S.

We report Hubble Space Telescope (HST) Near-infrared Camera and Multi-object Spectrometer (NICMOS) observations of the Arches and Quintuplet clusters, two extraordinary young clusters near the...

Evaporation of Compact Young Clusters near the Galactic Center (1999)

Kim, Sungsoo S., Morris, Mark, Lee, Hyung Mok

We investigate the dynamical evolution of compact young clusters (CYCs) near the Galactic center (GC) using Fokker-Planck models. CYCs are very young (< 5 Myr), compact (< 1 pc), and only a few tens...

Massive stars in the quintuplet cluster (1999)

Figer, Donald, McLean, Ian, Morris, Mark

Also archived at: arXiv:astro-ph/9903281 v1 18 Mar 1999

Massive stars in the quintuplet cluster (1999)

Figer, Donald, McLean, Ian, Morris, Mark

Also archived at: arXiv:astro-ph/9903281 v1 18 Mar 1999

Massive Stars in the Quintuplet Cluster (1999)

Figer, Donald F., McLean, Ian S., Morris, Mark

We present near-infrared photometry and K-band spectra of newly-identified massive stars in the Quintuplet Cluster, one of the three massive clusters projected within 50 pc of the Galactic Center. We...

HIGH-RESOLUTION INFRARED IMAGING AND SPECTROSCOPY OF THE PISTOL NEBULA: EVIDENCE FOR EJECTION1 (1999)

Donald F. Figer, Mark Morris, T. R. Geballe, R. Michael Rich, Eugene Serabyn, Ian S. Mclean, ...

We present new infrared images, obtained with the Hubble Space Telescope (HST) Near-Infrared Camera and Multiobject Spectrometer (NICMOS), and Bra (4.05 km) spectroscopy, obtained using CGS4 on...

H2O Maser Emission Associated with T Tauri and other Regions of Star Formation, (1998)

Knapp,G. R., Morris,Mark

The detection of H2O maser emission is reported from three new galactic regions: a point 0.9 min NE of T Tauri, and towards the HII regions G29.9-0.0 and G0.55-0.85. The T Tauri water source is not...

LEC Growth of Bulk In(x)Ga(1-x)As. (1998)

Ware, Rowland M., Puechner, R. A., Tiernan, Mark, Morris, Mark

A Double Crucible Liquid Encapsulated Czochralski (DCLEC) process was developed for the growth of single crystals of In(x)Ga(1-x)As. The conditions for the flow of non-wetting liquids through...

Benedetta (1995)

Morris, Mark

Bibliography: p. 128-132.

Benedetta (1995)

Morris, Mark

Bibliography: p. 128-132.

Something wicked this way : a delineation of the Ethiopian opera in three acts / (1993)

Morris, Mark.

Thesis (M.A.)--Michigan State University. Dept. of History, 1993.

Nicotine induces cell proliferation by β-arrestin–mediated activation of Src and Rb–Raf-1 pathways

Dasgupta, Piyali, Rastogi, Shipra, Pillai, Smitha, Ordonez-Ercan, Dalia, Morris, Mark, Haura, Eric, ...

Recent studies have shown that nicotine, a component of cigarette smoke, can stimulate the proliferation of non-neuronal cells. While nicotine is not carcinogenic by itself, it has been shown to...

Prohibitin Facilitates Cellular Senescence by Recruiting Specific Corepressors To Inhibit E2F Target Genes

Rastogi, Shipra, Joshi, Bharat, Dasgupta, Piyali, Morris, Mark, Wright, Kenneth, Chellappan, Srikumar

Prohibitin is a growth regulatory gene that has pleiotropic functions in the nucleus, mitochondria, and cytoplasmic compartments. Earlier studies had proposed a role for prohibitin in modulating...

Prohibitin Facilitates Cellular Senescence by Recruiting Specific Corepressors To Inhibit E2F Target Genes

Rastogi, Shipra, Joshi, Bharat, Dasgupta, Piyali, Morris, Mark, Wright, Kenneth, Chellappan, Srikumar

Prohibitin is a growth regulatory gene that has pleiotropic functions in the nucleus, mitochondria, and cytoplasmic compartments. Earlier studies had proposed a role for prohibitin in modulating...

Nicotine induces cell proliferation by β-arrestin–mediated activation of Src and Rb–Raf-1 pathways

Dasgupta, Piyali, Rastogi, Shipra, Pillai, Smitha, Ordonez-Ercan, Dalia, Morris, Mark, Haura, Eric, ...

Recent studies have shown that nicotine, a component of cigarette smoke, can stimulate the proliferation of non-neuronal cells. While nicotine is not carcinogenic by itself, it has been shown to...

Evaluation of a functional epigenetic approach to identify promoter region methylation in phaeochromocytoma and neuroblastoma

Margetts, Caroline D E, Morris, Mark, Astuti, Dewi, Gentle, Dean C, Cascon, Alberto, McRonald, Fiona E, ...

The molecular genetics of inherited phaeochromocytoma have received considerable attention, but the somatic genetic and epigenetic events that characterise tumourigenesis in sporadic...

Effects of Incorporation Method of Ethoprop and Addition of Aldicarb on Potato Tuber Infection by Meloidogyne hapla

Ingham, Russell E., Morris, Mark, Newcomb, Gene B.

The efficacy of controlling Meloidogyne hapla on potato with water incorporation of ethoprop was compared to physical incorporation before planting. The standard practice of aldicarb application for...