Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Chappell, Samantha"'
Autor:
Do, Tuan, Hees, Aurelien, Ghez, Andrea, Martinez, Gregory D., Chu, Devin S., Jia, Siyao, Sakai, Shoko, Lu, Jessica R., Gautam, Abhimat K., O'Neil, Kelly Kosmo, Becklin, Eric E., Morris, Mark R., Matthews, Keith, Nishiyama, Shogo, Campbell, Randy, Chappell, Samantha, Chen, Zhuo, Ciurlo, Anna, Dehghanfar, Arezu, Gallego-Cano, Eulalia, Kerzendorf, Wolfgang E., Lyke, James E., Naoz, Smadar, Saida, Hiromi, Schödel, Rainer, Takahashi, Masaaki, Takamori, Yohsuke, Witzel, Gunther, Wizinowich, Peter
General Relativity predicts that a star passing close to a supermassive black hole should exhibit a relativistic redshift. We test this using observations of the Galactic center star S0-2. We combine existing spectroscopic and astrometric measurement
Externí odkaz:
http://arxiv.org/abs/1907.10731
Autor:
Lockhart, Kelly E., Do, Tuan, Larkin, James E., Boehle, Anna, Campbell, Randy D., Chappell, Samantha, Chu, Devin, Ciurlo, Anna, Cosens, Maren, Fitzgerald, Michael P., Ghez, Andrea, Lu, Jessica R., Lyke, Jim E., Mieda, Etsuko, Rudy, Alexander R., Vayner, Andrey, Walth, Gregory, Wright, Shelley A.
OSIRIS is a near-infrared (1.0--2.4 $\mu$m) integral field spectrograph operating behind the adaptive optics system at Keck Observatory, and is one of the first lenslet-based integral field spectrographs. Since its commissioning in 2005, it has been
Externí odkaz:
http://arxiv.org/abs/1812.02053
Autor:
Chu, Devin S., Do, Tuan, Hees, Aurelien, Ghez, Andrea, Naoz, Smadar, Witzel, Gunther, Sakai, Shoko, Chappell, Samantha, Gautam, Abhimat K., Lu, Jessica R., Matthews, Keith
The star S0-2, which orbits the supermassive black hole (SMBH) in our Galaxy with a period of 16 years, provides the strongest constraint on both the mass of the SMBH and the distance to the Galactic center. S0-2 will soon provide the first measureme
Externí odkaz:
http://arxiv.org/abs/1709.04890
Autor:
Witzel, Gunther, Sitarski, Breann. N., Ghez, Andrea M., Morris, Mark R., Hees, Aurelien, Do, Tuan, Lu, Jessica R., Naoz, Smadar, Boehle, Anna, Martinez, Greg, Chappell, Samantha, Schödel, Rainer, Meyer, Leo, Yelda, Sylvana, Becklin, Ereic E., Matthews, Keith
We present new Adaptive Optics (AO) imaging and spectroscopic measurements of Galactic Center source G1 from W. M. Keck Observatory. Our goal is to understand its nature and relationship to G2, which is the first example of a spatially-resolved objec
Externí odkaz:
http://arxiv.org/abs/1707.02301
Autor:
Do, Tuan, Ghez, Andrea, Morris, Mark, Lu, Jessica, Chappell, Samantha, Feldmeier-Krause, Anja, Kerzendorf, Wolfgang, Martinez, Gregory David, Murray, Norm, Winsor, Nathan
Due to its proximity, the Milky Way nuclear star cluster provides us with a wealth of data not available in other galactic nuclei. In particular, with adaptive optics, we can observe the detailed properties of individual stars, which can offer insigh
Externí odkaz:
http://arxiv.org/abs/1610.02964
Autor:
Chappell, Samantha N., Ghez, Andrea M., Do, Tuan, Martinez, Gregory D., Yelda, Sylvana, Sitarski, Breann N., Lu, Jessica R., Morris, Mark R.
The late-type stellar population in the Galactic Center was first predicted to reside in a dynamically relaxed cusp (power law slope ranging from 3/2 to 7/4). However, observations - which rely on models to correct for projection effects - have sugge
Externí odkaz:
http://arxiv.org/abs/1610.02437
Autor:
Gautam, Abhimat K., Do, Tuan, Ghez, Andrea M., Lu, Jessica R., Morris, Mark R., Sakai, Shoko, Witzel, Gunther, Sitarski, Breann N., Chappell, Samantha
We present constraints on the variability and binarity of young stars in the central 10 arcseconds (~0.4 pc) of the Milky Way Galactic Center (GC) using Keck Adaptive Optics data over a 12 year baseline. Given our experiment's photometric uncertainti
Externí odkaz:
http://arxiv.org/abs/1610.02441
Autor:
Witzel, Gunther, Ghez, Andrea M., Morris, Mark R., Sitarski, Breann N., Boehle, Anna, Naoz, Smadar, Campbell, Randall, Becklin, Eric E., Canalizo, Gabriela, Chappell, Samantha, Do, Tuan, Lu, Jessica R., Matthews, Keith, Meyer, Leo, Stockton, Alan, Wizinowich, Peter, Yelda, Sylvana
We report new observations of the Galactic Center source G2 from the W. M. Keck Observatory. G2 is a dusty red object associated with gas that shows tidal interactions as it nears closest approach with the Galaxy's central black hole. Our observation
Externí odkaz:
http://arxiv.org/abs/1410.1884
Autor:
Bailin, Jeremy, Bell, Eric F., Chappell, Samantha N., Radburn-Smith, David J., de Jong, Roelof S.
We have obtained Magellan/IMACS and HST/ACS imaging data that resolve red giant branch stars in the stellar halo of the starburst galaxy NGC 253. The HST data cover a small area, and allow us to accurately interpret the ground-based data, which cover
Externí odkaz:
http://arxiv.org/abs/1105.0005
Autor:
Tuan Do, Hees, Aurelien, Ghez, Andrea, Martinez, Gregory D., Chu, Devin S., Siyao Jia, Shoko Sakai, Lu, Jessica R., Gautam, Abhimat K., Kosmo O'Neil, Kelly, Becklin, Eric E., Morris, Mark R., Matthews, Keith, Shogo Nishiyama, Campbell, Randy, Chappell, Samantha, Zhuo Chen, Ciurlo, Anna, Witzel, Arezu, Gallego-Cano, Eulalia
Publikováno v:
ASP Conference Series; 2020, Vol. 528, p249-254, 6p