Zobrazeno 1 - 10 of 14 pro vyhledávání: '"Samantha Chappell"'
1
Characterizing and Improving the Data Reduction Pipeline for the Keck OSIRIS Integral Field Spectrograph
Autor: Etsuko Mieda, Anna Boehle, Tuan Do, James E. Lyke, Andrea M. Ghez, Alexander R. Rudy, Shelley A. Wright, Samantha Chappell, Kelly E. Lockhart, Randy Campbell, James E. Larkin, Anna Ciurlo, Andrey Vayner, Gregory Walth, Maren Cosens, Michael P. Fitzgerald, Jessica R. Lu, Devin S. Chu
Publikováno v: Astronomical Journal, vol 157, iss 2
The Astronomical Journal, vol 157, iss 2
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda7a72c3ee59b8306bea402e08d63cc
http://arxiv.org/abs/1812.02053
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2
Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center
Autor: Mark Morris, E. E. Becklin, Smadar Naoz, Tuan Do, Anna Boehle, Shoko Sakai, G. D. Martinez, Samantha Chappell, Aurélien Hees, G. Witzel, Kelly Kosmo, Rainer Schödel, Andrea M. Ghez, Jessica R. Lu, Devin S. Chu, Arezu Dehghanfar, Keith Matthews
Publikováno v: Hees, A; Do, T; Ghez, AM; Martinez, GD; Naoz, S; Becklin, EE; et al.(2017). Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center. PHYSICAL REVIEW LETTERS, 118(21). doi: 10.1103/PhysRevLett.118.211101. UCLA: Retrieved from: http://www.escholarship.org/uc/item/4b98m1n3
Physical review letters, vol 118, iss 21
In this Letter, we demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic Center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bf0d6deb47cb9609bca5df770155717
https://doi.org/10.1103/physrevlett.118.211101
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3
Observational constraints on the formation and evolution of the Milky Way nuclear star cluster with Keck and Gemini
Autor: Samantha Chappell, Anja Feldmeier-Krause, Mark Morris, Wolfgang Kerzendorf, Andrea M. Ghez, Gregory D. Martinez, Jessica R. Lu, Norm Murray, Tuan Do, Nathan Winsor
Publikováno v: NASA Astrophysics Data System
Proceedings of the International Astronomical Union, vol 11, iss S322
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5478869fc6d1753eaac7f9ff39ba783a
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5
Constraining the Variability and Binary Fraction of Galactic Center Young Stars
Autor: Samantha Chappell, Abhimat K. Gautam, Shoko Sakai, Gunther Witzel, Jessica R. Lu, Andrea M. Ghez, Breann N. Sitarski, Tuan Do, Mark Morris
Publikováno v: Proceedings of the International Astronomical Union, vol 11, iss S322
NASA Astrophysics Data System
Gautam, AK; Do, T; Ghez, AM; Lu, JR; Morris, MR; Sakai, S; et al.(2017). Constraining the Variability and Binary Fraction of Galactic Center Young Stars. UCLA: Retrieved from: http://www.escholarship.org/uc/item/179199wq
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9f3353e6a5d74903b950ca3378e1497
https://doi.org/10.1017/s1743921316011996
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6
Detection of Galactic Center Source G2 at 3.8 μm during Periapse Passage
Autor: Leo Meyer, Randall D. Campbell, Tuan Do, Sylvana Yelda, Mark Morris, Breann N. Sitarski, Eric E. Becklin, Alan Stockton, Keith Matthews, Anna Boehle, Andrea M. Ghez, Samantha Chappell, Smadar Naoz, Gabriela Canalizo, Jessica R. Lu, Gunther Witzel, Peter Wizinowich
Publikováno v: Witzel, G; Ghez, AM; Morris, MR; Sitarski, BN; Boehle, A; Naoz, S; et al.(2014). Detection of Galactic Center source G2 at 3.8 μm during periapse passage. Astrophysical Journal Letters, 796(1). doi: 10.1088/2041-8205/796/1/L8. UCLA: Retrieved from: http://www.escholarship.org/uc/item/7kc2v20t
Astrophysical Journal Letters, vol 796, iss 1
The Astrophysical Journal Letters, vol 796, iss 1
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55813bf928e1f47558cfdaeb11ec2738
https://resolver.caltech.edu/CaltechAUTHORS:20141215-090620639
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9
Investigating the Binarity of S0-2: Implications for its Origins and Robustness as a Probe of the Laws of Gravity around a Supermassive Black Hole
Autor: Samantha Chappell, Devin S. Chu, Gunther Witzel, Keith Matthews, Andrea M. Ghez, Tuan Do, Abhimat K. Gautam, Smadar Naoz, Shoko Sakai, Aurélien Hees, Jessica R. Lu
Publikováno v: NASA Astrophysics Data System
Astrophysical Journal, vol 854, iss 1
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2018, 854 (1), pp.12. ⟨10.3847/1538-4357/aaa3eb⟩
The Astrophysical Journal, vol 854, iss 1
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a514d4f2300bdf14db27e2af65d4d9b3
https://ui.adsabs.harvard.edu/#abs/2018AAS...23131102C
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10
The Post-Periapse Evolution of Galactic Center Source G1: The second case of a resolved tidal interaction with a supermassive black hole
Autor: Leo Meyer, Samantha Chappell, Jessica R. Lu, Tuan Do, Anna Boehle, Rainer Schödel, Breann N. Sitarski, Keith Matthews, Smadar Naoz, Andrea M. Ghez, Mark Morris, G. D. Martinez, Aurélien Hees, Sylvana Yelda, E. E. Becklin, G. Witzel
Publikováno v: NASA Astrophysics Data System
Astrophysical Journal, vol 847, iss 1
The Astrophysical Journal, vol 847, iss 1
Witzel, G; Sitarski, BN; Ghez, AM; Morris, MR; Hees, A; Do, T; et al.(2017). The Post-periapsis Evolution of Galactic Center Source G1: The Second Case of a Resolved Tidal Interaction with a Supermassive Black Hole. ASTROPHYSICAL JOURNAL, 847(1). doi: 10.3847/1538-4357/aa80ea. UCLA: Retrieved from: http://www.escholarship.org/uc/item/9479s1h8
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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b11ff0460900a08a4f661d0e1ddb852e
https://ui.adsabs.harvard.edu/#abs/2017arXiv170702301W
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