Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Randall D. Campbell"'
Autor:
Anna Ciurlo, Randall D. Campbell, Mark R. Morris, Tuan Do, Andrea M. Ghez, Eric E. Becklin, Rory O. Bentley, Devin S. Chu, Abhimat K. Gautam, Yash A. Gursahani, Aurélien Hees, Kelly Kosmo O’Neil, Jessica R. Lu, Gregory D. Martinez, Smadar Naoz, Shoko Sakai, Rainer Schödel
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 136 (2023)
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 and gas feature, presently located half an arcsecond from the Galactic Center supermassive
Externí odkaz:
https://doaj.org/article/a18ceb2002754caea92e9029994775fd
Autor:
Claire E. Max, James E. Lyke, Charles D. Kilpatrick, Tyler Takaro, Wynn V. Jacobson-Galán, Yen-Chen Pan, Randall D. Campbell, Sophia A. Medallon, Ryan J. Foley, Armin Rest, C. Leibler, Hilton Lewis
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 480:2072-2084
We report the first detection of a credible progenitor system for a Type Ic supernova (SN Ic), SN 2017ein. We present spectra and photometry of the SN, finding it to be similar to carbon-rich, low-luminosity SNe Ic. Using a post-explosion Keck adapti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::914741c1859b1b32f8616daa7f0fa6ab
https://doi.org/10.1093/mnras/sty2022
https://doi.org/10.1093/mnras/sty2022
Autor:
Tuan Do, Gregory D. Martinez, Mark Morris, Devin S. Chu, Anna Ciurlo, Randall D. Campbell, Andrea M. Ghez, Alexander P. Stephan, Breann N. Sitarski, Smadar Naoz, Kelly Kosmo O'Neil, Aurélien Hees
Publikováno v:
Nature, vol 577, iss 7790
Nature
Nature, Nature Publishing Group, 2020, 577 (7790), pp.337-340. ⟨10.1038/s41586-019-1883-y⟩
Nature
Nature, Nature Publishing Group, 2020, 577 (7790), pp.337-340. ⟨10.1038/s41586-019-1883-y⟩
The central 0.1parsecs of the Milky Way host a supermassive black hole identified with the position of the radio and infrared source Sagittarius A* (refs. 1,2), a cluster of young, massive stars (the S stars3) and various gaseous features4,5. Recentl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae9e60a8f27ff293cbaa89e64d21fb2f
https://pubmed.ncbi.nlm.nih.gov/31942053
https://pubmed.ncbi.nlm.nih.gov/31942053
Publikováno v:
The Astrophysical Journal. 910:143
We present the first observational constraint on the Br-gamma recombination line emission associated with the supermassive black hole at the center of our Galaxy, known as Sgr A*. By combining 13 years of data with the Adaptive Optics fed integral fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dae1272b2d59462fba9278885219c76
https://doi.org/10.3847/1538-4357/abe71a
https://doi.org/10.3847/1538-4357/abe71a
Autor:
Tuan Do, G. Witzel, Jessica R. Lu, Paolo Turri, Andrea M. Ghez, James E. Lyke, Anna Ciurlo, Randall D. Campbell, Michael P. Fitzgerald
Publikováno v:
Adaptive Optics Systems VI.
The integral field spectrograph OSIRIS at Keck I has been used to measure the motion of the stars around the supermassive black hole at the Center of the Galaxy. The small field of view provided and the crowding of the region prevent any good PSF est
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e4142d0ffe13cb3cab1c3a76e258730
https://doi.org/10.1117/12.2314291
https://doi.org/10.1117/12.2314291
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We present modeling and analysis of the ejecta of nova V723 Cas based on spatially resolved IR spectroscopic data from Keck-OSIRIS, with LGSAO (adaptive optics module). The 3D photoionization models include the shell geometry taken from the observati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06c3bcf80e5387cf2af725b14761848b
http://arxiv.org/abs/1709.01205
http://arxiv.org/abs/1709.01205
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
https://doi.org/10.1117/12.2233872
Autor:
Pauline Arriaga, Keith Matthews, James E. Lyke, Peter Wizinowich, Sean M. Adkins, Randall D. Campbell, Michael P. Fitzgerald
The design and performance of astronomical instruments depend critically on the total system throughput as well as the background emission from the sky and instrumental sources. In designing a pupil stop for background- limited imaging, one seeks to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f76ae0fde1a8756eb50c8dc54e6f1d99
https://resolver.caltech.edu/CaltechAUTHORS:20170216-134523959
https://resolver.caltech.edu/CaltechAUTHORS:20170216-134523959
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 349:869-881
We present a search for excess mid-IR emission due to circumbinary material in the orbital plane of cataclysmic variables (CVs). Our motivation stems from the fact that the strong braking exerted by a circumbinary (CB) disc on the binary system could
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::356efe5bc7c844e1286bd7e4e061e6d9
https://doi.org/10.1111/j.1365-2966.2004.07551.x
https://doi.org/10.1111/j.1365-2966.2004.07551.x
Autor:
Randall D. Campbell
Publikováno v:
Experimental Astronomy. 14:57-60
Keck's Long Wavelength Spectrometer (LWS), is the facility instrument used for imaging and spectroscopy in the wavelength range of 3–28 μm at the Keck Observatory. LWS uses an 128 × 128 Si:As blocked impurity band (BIB) array manufactured by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbd46390d6621b968a6d166af3ca6d4d
https://doi.org/10.1023/a:1026102708807
https://doi.org/10.1023/a:1026102708807