Search Results - "Ghez, Andrea M"

The Fate of Binaries in the Galactic Center: The Mundane and the Exotic by Stephan, Alexander P., Naoz, Smadar, Ghez, Andrea M., Morris, Mark R., Ciurlo, Anna, Do, Tuan, Breivik, Katelyn, Coughlin, Scott, Rodriguez, Carl L.

“…The Galactic center is dominated by the gravity of a super-massive black hole (SMBH), Sagittarius A*, and is suspected to contain a sizable population of…”
Get full text

The Unusual Initial Mass Function of the Arches Cluster by Hosek, Matthew W., Lu, Jessica R., Anderson, Jay, Najarro, Francisco, Ghez, Andrea M., Morris, Mark R., Clarkson, William I., Albers, Saundra M.

“…As a young massive cluster in the central molecular zone, the Arches cluster is a valuable probe of the stellar initial mass function (IMF) in the extreme…”
Get full text

A population of dust-enshrouded objects orbiting the Galactic black hole by Ciurlo, Anna, Campbell, Randall D., Morris, Mark R., Do, Tuan, Ghez, Andrea M., Hees, Aurélien, Sitarski, Breann N., Kosmo O’Neil, Kelly, Chu, Devin S., Martinez, Gregory D., Naoz, Smadar, Stephan, Alexander P.

“…The central 0.1 parsecs of the Milky Way host a supermassive black hole identified with the position of the radio and infrared source Sagittarius A* (refs. 1 ,…”
Get full text

The Orbital Eccentricities of Directly Imaged Companions Using Observable-based Priors: Implications for Population-level Distributions by Do Ó, Clarissa R., O’Neil, Kelly K., Konopacky, Quinn M., Do, Tuan, Martinez, Gregory D., Ruffio, Jean-Baptiste, Ghez, Andrea M.

“…The eccentricity of a substellar companion is an important tracer of its formation history. Directly imaged companions often present poorly constrained…”
Get full text

The Star Formation History of the Milky Way’s Nuclear Star Cluster by Chen, Zhuo, Do, Tuan, Ghez, Andrea M., Hosek, Matthew W., Feldmeier-Krause, Anja, Chu, Devin S., Bentley, Rory O., Lu, Jessica R., Morris, Mark R.

“…We report the first star formation history study of the Milky Ways nuclear star cluster (NSC), which includes observational constraints from a large sample of…”
Get full text

Galactic Center IRS 13E: Colliding Stellar Winds or an Intermediate-mass Black Hole? by Zhu, Zhenlin, Li, Zhiyuan, Ciurlo, Anna, Morris, Mark R., Zhang, Mengfei, Do, Tuan, Ghez, Andrea M.

“…A small cluster of massive stars residing in the Galactic center, collectively known as IRS 13E, is of special interest due to its close proximity to the…”
Get full text

The Galactic Center in Color: Measuring Extinction with High-proper-motion Stars by Haggard, Zoë, Ghez, Andrea M., Sakai, Shoko, Gautam, Abhimat K., Do, Tuan, Lu, Jessica R., Hosek, Matthew, Morris, Mark R., Granados, Sean

“…The Milky Way’s central parsec is a highly extinguished region with a population of high-proper-motion stars. We have tracked 145 stars for ∼10 yr at…”
Get full text

An Adaptive Optics Survey of Stellar Variability at the Galactic Center by Gautam, Abhimat Krishna, Do, Tuan, Ghez, Andrea M., Morris, Mark R., Martinez, Gregory D., Hosek, Matthew W., Lu, Jessica R., Sakai, Shoko, Witzel, Gunther, Jia, Siyao, Becklin, Eric E., Matthews, Keith

“…We present an 11.5 yr adaptive optics (AO) study of stellar variability and search for eclipsing binaries in the central ∼0.4 pc (∼10″) of the Milky Way…”
Get full text

An Estimate of the Binary Star Fraction among Young Stars at the Galactic Center: Possible Evidence of a Radial Dependence by Gautam, Abhimat K., Do, Tuan, Ghez, Andrea M., Chu, Devin S., Hosek, Matthew W., Sakai, Shoko, Naoz, Smadar, Morris, Mark R., Ciurlo, Anna, Haggard, Zoë, Lu, Jessica R.

“…We present the first estimate of the intrinsic binary fraction of young stars across the central ≈0.4 pc surrounding the supermassive black hole (SMBH) at the…”
Get full text

The Optical/Near-infrared Extinction Law in Highly Reddened Regions by Hosek, Matthew W., Lu, Jessica R., Anderson, Jay, Do, Tuan, Schlafly, Edward F., Ghez, Andrea M., Clarkson, William I., Morris, Mark R., Albers, Saundra M.

“…A precise extinction law is a critical input when interpreting observations of highly reddened sources such as young star clusters and the Galactic Center…”
Get full text

The Swansong of the Galactic Center Source X7: An Extreme Example of Tidal Evolution near the Supermassive Black Hole by Ciurlo, Anna, Campbell, Randall D., Morris, Mark R., Do, Tuan, Ghez, Andrea M., Becklin, Eric E., Bentley, Rory O., Chu, Devin S., Gautam, Abhimat K., Gursahani, Yash A., Hees, Aurélien, O’Neil, Kelly Kosmo, Lu, Jessica R., Martinez, Gregory D., Naoz, Smadar, Sakai, Shoko, Schödel, Rainer

“…We present two decades of new high-angular-resolution near-infrared data from the W. M. Keck Observatory that reveal extreme evolution in X7, an elongated dust…”
Get full text

Near-infrared Flux Distribution of Sgr A from 2005–2022: Evidence for an Enhanced Accretion Episode in 2019 by Weldon, Grant C., Do, Tuan, Witzel, Gunther, Ghez, Andrea M., Gautam, Abhimat K., Becklin, Eric E., Morris, Mark R., Martinez, Gregory D., Sakai, Shoko, Lu, Jessica R., Matthews, Keith, Hosek, Matthew W., Haggard, Zoë

“…Sgr A* is the variable electromagnetic source associated with accretion onto the Galactic center supermassive black hole. While the near-infrared (NIR)…”
Get full text

THE ARCHES CLUSTER: EXTENDED STRUCTURE AND TIDAL RADIUS by Hosek Jr, Matthew W., Lu, Jessica R., Anderson, Jay, Ghez, Andrea M., Morris, Mark R., Clarkson, William I.

“…ABSTRACT At a projected distance of ∼26 pc from Sgr A*, the Arches cluster provides insight into star formation in the extreme Galactic center (GC)…”
Get full text

Merging binaries in the Galactic Center: the eccentric Kozai–Lidov mechanism with stellar evolution by Stephan, Alexander P., Naoz, Smadar, Ghez, Andrea M., Witzel, Gunther, Sitarski, Breann N., Do, Tuan, Kocsis, Bence

“…Most, if not all, stars in the field are born in binary configurations or higher multiplicity systems. In dense stellar environment such as the Galactic Center…”
Get full text

KECK ADAPTIVE OPTICS OBSERVATIONS OF THE PROTOSTELLAR DISK AROUND RADIO SOURCE I IN THE ORION KLEINMANN-LOW NEBULA by Sitarski, Breann N, Morris, Mark R, Lu, Jessica R, Duchene, Gaspard, Stolte, Andrea, Becklin, E E, Ghez, Andrea M, Zinnecker, Hans

“…We have made the first detection of a near-infrared counterpart associated with the disk around Radio Source "I," a massive protostar in the Kleinmann-Low…”
Get full text

On Socially Distant Neighbors: Using Binaries to Constrain the Density of Objects in the Galactic Center by Rose, Sanaea C., Naoz, Smadar, Gautam, Abhimat K., Ghez, Andrea M., Do, Tuan, Chu, Devin, Becklin, Eric

“…Stars often reside in binary configurations. The nuclear star cluster surrounding the supermassive black hole (SMBH) in the Galactic Center (GC) is expected to…”
Get full text

Measuring the Orbits of the Arches and Quintuplet Clusters Using HST and Gaia: Exploring Scenarios for Star Formation near the Galactic Center by Hosek, Matthew W., Do, Tuan, Lu, Jessica R., Morris, Mark R., Ghez, Andrea M., Martinez, Gregory D., Anderson, Jay

“…We present new absolute proper-motion measurements for the Arches and Quintuplet clusters, two young massive star clusters near the Galactic center. Using…”
Get full text

The Quintuplet Cluster: Extended Structure and Tidal Radius by Rui, Nicholas Z., Hosek, Matthew W., Lu, Jessica R., Clarkson, William I., Anderson, Jay, Morris, Mark R., Ghez, Andrea M.

“…The Quintuplet star cluster is one of only three known young (<10 Myr) massive (M > 104 M ) clusters within ∼100 pc of the Galactic center (GC). In order to…”
Get full text

Upper Limit on Brackett-γ Emission from the Immediate Accretion Flow onto the Galactic Black Hole by Ciurlo, Anna, Morris, Mark R., Campbell, Randall D., Ghez, Andrea M., Do, Tuan, Chu, Devin S.

“…We present the first observational constraint on the Brackett- γ (Br γ ) recombination line emission associated with the supermassive black hole at the center…”
Get full text

DISCOVERY OF LOW-METALLICITY STARS IN THE CENTRAL PARSEC OF THE MILKY WAY by Do, Tuan, Kerzendorf, Wolfgang, Winsor, Nathan, Støstad, Morten, Morris, Mark R., Lu, Jessica R., Ghez, Andrea M.

“…ABSTRACT We present a metallicity analysis of 83 late-type giants within the central 1 pc of the Milky Way. K-band spectroscopy of these stars was obtained…”
Get full text