Zobrazeno 1 - 10 of 270 pro vyhledávání: '"E. E. Becklin"'
1
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High Spatial Resolution Imaging of NGC 1068 in the Mid Infrared
Autor: Bock, J. J., Neugebauer, G., Matthews, K., Soifer, B. T., Ressler, E. E. Becklin M., Marsh, K., Werner, M. W., Egami, E., Blandford, R. D.
Publikováno v: Astron.J. 120 (2000) 2904
Mid-infrared observations of the central source of NGC 1068 have been obtained with a spatial resolution in the deconvolved image of 0.1" (~ 7pc). The central source is extended by ~1" in the north-south direction but appears unresolved in the east-w
Externí odkaz: http://arxiv.org/abs/astro-ph/0009078
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2
Multiwavelength Variability of Sagittarius A* in 2019 July
Autor: H. Boyce, D. Haggard, G. Witzel, S. von Fellenberg, S. P. Willner, E. E. Becklin, T. Do, A. Eckart, G. G. Fazio, M. A. Gurwell, J. L. Hora, S. Markoff, M. R. Morris, J. Neilsen, M. Nowak, H. A. Smith, S. Zhang
Publikováno v: Astrophysical Journal, 931:7. IOP Publishing Ltd.
We report a timing analysis of near-infrared (NIR), X-ray, and submillimeter data during a 3 day coordinated campaign observing Sagittarius A*. Data were collected at 4.5 μm with the Spitzer Space Telescope, 2–8 keV with the Chandra X-ray Observat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a46193d2a853a4518e75fc097b9387b7
https://dare.uva.nl/personal/pure/en/publications/multiwavelength-variability-of-sagittarius-a-in-2019-july(4e5b7ae1-d8a8-49f4-a479-eb8a57ae4a67).html
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3
Rapid Variability of Sgr A* across the Electromagnetic Spectrum
Autor: Howard A. Smith, Rubén Herrero-Illana, Andrea M. Ghez, Nicola Marchili, Tuan Do, Hope Boyce, Mark Gurwell, Mark Morris, Giovanni G. Fazio, Daryl Haggard, Zhiyuan Li, J. A. Zensus, Steven P. Willner, M. Subroweit, Joseph L. Hora, Andreas Eckart, G. Witzel, E. E. Becklin, Gregory D. Martinez, Jun Liu
Sagittarius A* (Sgr A*) is the variable radio, near-infrared (NIR), and X-ray source associated with accretion onto the Galactic center black hole. We have analyzed a comprehensive submillimeter (including new observations simultaneous with NIR monit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c1788398bc669b1188e2aba006b34ee
http://hdl.handle.net/20.500.12386/31788
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4
Simultaneous X-Ray and Infrared Observations of Sagittarius A*'s Variability
Autor: Giovanni G. Fazio, Howard A. Smith, Joseph L. Hora, Sera Markoff, Mark Morris, Steven P. Willner, J. Neilsen, G. Witzel, Gabriele Ponti, Daryl Haggard, Hope Boyce, E. E. Becklin, Frederick K. Baganoff, Patrick J. Lowrance
Publikováno v: Astrophys J
The Astrophysical journal, vol 871, iss 2
Astrophysical Journal, 871(2):161. IOP Publishing Ltd.
Emission from Sgr A* is highly variable at both X-ray and infrared (IR) wavelengths. Observations over the last ~20 years have revealed X-ray flares that rise above a quiescent thermal background about once per day, while faint X-ray flares from Sgr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9681c6758a81aa8b74c48acb7b8701e
https://ui.adsabs.harvard.edu/abs/2019ApJ...871..161B/abstract
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5
Consistency of the Infrared Variability of SGR A* over 22 yr
Autor: Mark Morris, E. E. Becklin, Tuan Do, G. Witzel, Abhimat K. Gautam, Matthew W. Hosek, Siyao Jia, Keith Matthews, A. C. Mangian, Rainer Schödel, Zhuo Chen, Arezu Dehghanfar, Breann N. Sitarski, E. Gallego-Cano, Andrea M. Ghez, Jessica R. Lu, A. Hees
Publikováno v: The Astrophysical journal letters
The Astrophysical journal letters, Bristol : IOP Publishing, 2019, 882 (2), pp.L28. ⟨10.3847/2041-8213/ab3c68⟩
The Astrophysical Journal Letters, vol 882, iss 2
Astrophysical Journal Letters, vol 882, iss 2
Digital.CSIC. Repositorio Institucional del CSIC
instname
We report new infrared measurements of the supermassive black hole at the Galactic Center, Sgr A*, over a decade that was previously inaccessible at these wavelengths. This enables a variability study that addresses variability timescales that are te
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e712f02d015eb2742186ad7e54f3079
https://hal.sorbonne-universite.fr/hal-02301426
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6
Multiwavelength Light Curves of Two Remarkable Sagittarius A* Flares
Autor: Frederick K. Baganoff, Howard A. Smith, Sean Carey, Daniel P. Marrone, Steven P. Willner, Mark Gurwell, Giovanni G. Fazio, Andrea M. Ghez, Daryl Haggard, James G. Ingalls, Charles F. Gammie, M. L. N. Ashby, E. E. Becklin, Mark Morris, Joseph L. Hora, G. Witzel
Publikováno v: Astrophys J
The Astrophysical journal, vol 864, iss 1
Sgr A*, the supermassive black hole (SMBH) at the center of our Milky Way Galaxy, is known to be a variable source of X-ray, near-infrared (NIR), and submillimeter (submm) radiation and therefore a prime candidate to study the electromagnetic radiati
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ef6bc35702d9108aa7eb3ee71f389ec
http://arxiv.org/abs/1807.07599
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7
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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8
Near infrared variability of Sgr A* - spectral index measurements
Autor: Leo Meyer, E. E. Becklin, Jessica R. Lu, G. Witzel, Randy D. Campbell, Mark Morris, Tuan Do, Andrea M. Ghez, Keith Matthews
Publikováno v: Proceedings of the International Astronomical Union. 9:274-282
We discuss observations of Sagittarius A* with NACO@VLT in K-band and recent synchronous observations with NIRC2@Keck II and OSIRIS@Keck I in L′-band and H-band, respectively. The variability of Sagittarius A* in the near infrared is a continuous o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::19c9fe71a2f74cff1ffc298fbd616ec7
https://doi.org/10.1017/s1743921314000738
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10
The AIROPA software package: milestones for testing general relativity in the strong gravity regime with AO
Autor: Gunther Witzel, Jessica R. Lu, Andrea M. Ghez, Gregory D. Martinez, Michael P. Fitzgerald, Matthew Britton, Breann N. Sitarski, Tuan Do, Randall D. Campbell, Maxwell Service, Keith Matthews, Mark R. Morris, E. E. Becklin, Peter L. Wizinowich, Sam Ragland, Greg Doppmann, Chris Neyman, James Lyke, Marc Kassis, Luca Rizzi, Scott Lilley, Rachel Rampy
Publikováno v: Adaptive Optics Systems V.
General relativity can be tested in the strong gravity regime by monitoring stars orbiting the supermassive black hole at the Galactic Center with adaptive optics. However, the limiting source of uncertainty is the spatial PSF variability due to atmo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee3bf66aae885da1920ffa5352fcfc04
https://doi.org/10.1117/12.2233872
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