J
James K. Williams
Researcher at George Mason University
Publications - 9
Citations - 165
James K. Williams is an academic researcher from George Mason University. The author has contributed to research in topics: Active galactic nucleus & Line (formation). The author has an hindex of 7, co-authored 8 publications receiving 121 citations.
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Journal ArticleDOI
Buried Black Hole Growth in IR-selected Mergers: New Results from Chandra
Ryan W. Pfeifle,Shobita Satyapal,Nathan J. Secrest,Mario Gliozzi,Claudio Ricci,Claudio Ricci,Claudio Ricci,Sara L. Ellison,Barry Rothberg,Barry Rothberg,Jenna M. Cann,Laura Blecha,James K. Williams,Anca Constantin +13 more
TL;DR: In this paper, the authors present the results of the 2017 CONICYT+PAI Convocatoria Nacional subvencion a instalacion en la academia convocatoria ano [2017 PAI77170080], National Science Foundation [1715413], NASA [GO6-17096X, GO7-18099X, NNX17AD59G], Sigma Xi, the Scientific Research Society
Journal ArticleDOI
The soft X-ray excess: NLS1s versus BLS1s
Mario Gliozzi,James K. Williams +1 more
TL;DR: In this article, the authors measured the soft X-ray excess strength in a flux-limited sample of broad-line and narrow-line Seyfert 1 galaxies (BLS1s and NLS 1s) that are matched in Xray luminosity but different in terms of the black hole mass and the accretion rate values.
Journal ArticleDOI
An Unusual Transmission Spectrum for the Sub-Saturn KELT-11b Suggestive of a Subsolar Water Abundance
Knicole D. Colón,Laura Kreidberg,Laura Kreidberg,Luis Welbanks,Michael R. Line,Nikku Madhusudhan,Thomas G. Beatty,Patrick Tamburo,Kevin B. Stevenson,Avi Mandell,Joseph E. Rodriguez,Thomas Barclay,Thomas Barclay,Eric D. Lopez,Keivan G. Stassun,Daniel Angerhausen,Jonathan J. Fortney,David J. James,Joshua Pepper,John P. Ahlers,Peter Plavchan,Supachai Awiphan,Cliff Kotnik,Kim K. McLeod,Gabriel Murawski,Heena Chotani,Danny LeBrun,William Matzko,David Rea,Monica Vidaurri,Scott Webster,James K. Williams,Leafia Sheraden Cox,Nicole Tan,Emily A. Gilbert +34 more
TL;DR: In this paper, an optical-to-infrared transmission spectrum of the inflated sub-Saturn-mass exoplanet KELT-11b measured with the Transiting Exoplanet Survey Satellite (TESS), the HST Wide Field Camera 3 (WFC3) G141 spectroscopic grism, and the Spitzer Space Telescope (Spitzer) at 3.6
Journal ArticleDOI
An Unusual Transmission Spectrum for the Sub-Saturn KELT-11b Suggestive of a Sub-Solar Water Abundance
Knicole D. Colón,Laura Kreidberg,Luis Welbanks,Michael R. Line,Nikku Madhusudhan,Thomas G. Beatty,Patrick Tamburo,Kevin B. Stevenson,Avi Mandell,Joseph E. Rodriguez,Thomas Barclay,Eric D. Lopez,Keivan G. Stassun,Daniel Angerhausen,Jonathan J. Fortney,David J. James,Joshua Pepper,John P. Ahlers,Peter Plavchan,Supachai Awiphan,Cliff Kotnik,Kim K. McLeod,Gabriel Murawski,Heena Chotani,Danny LeBrun,William Matzko,David Rea,Monica Vidaurri,Scott Webster,James K. Williams,Leafia Sheraden Cox,Nicole Tan,Emily A. Gilbert +32 more
TL;DR: In this article, an optical-to-infrared transmission spectrum of the inflated sub-Saturn KELT-11b measured with the Transiting Exoplanet Survey Satellite (TESS), the HST Wide Field Camera 3 G141 spectroscopic grism, and the Spitzer Space Telescope (Spitzer) at 3.6$m, in addition to a Spitzer 4.5$m secondary eclipse.