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45 papers · 2 filters
An Over-Massive Black Hole in a Typical Star-Forming Galaxy, 2 Billion Years After the Big Bang
Benny Trakhtenbrot, C. Megan Urry, Francesca Civano +6
Supermassive black holes (SMBHs) and their host galaxies are generally thought to coevolve, so that the SMBH achieves up to about 0.2 to 0.5% of the host galaxy mass in the present…
The composite nature of Dust-Obscured Galaxies (DOGs) at z~2-3 in the COSMOS field: I. A Far-Infrared View
L. Riguccini, E. Le Floc'h, J. R. Mullaney +19
Dust-Obscured galaxies (DOGs) are bright 24 um-selected sources with extreme obscuration at optical wavelengths. They are typically characterized by a rising power-law continuum of…
Broadband Observations of the Compton-thick Nucleus of NGC 3393
Michael J. Koss, C. Romero-Canizales, L. Baronchelli +16
We present new NuSTAR and Chandra observations of NGC 3393, a galaxy reported to host the smallest separation dual AGN resolved in the X-rays. While past results suggested a 150 pc…
Massive Stars in the W33 Giant Molecular Complex
Maria Messineo, J. Simon Clark, Donald F. Figer +9
Rich in HII regions, giant molecular clouds are natural laboratories to study massive stars and sequential star formation. The Galactic star forming complex W33 is located at l=~12…
Monitoring the temperature and reverberation delay of the circumnuclear hot dust in NGC 4151
K. Schnuelle, J. -U. Pott, H. -W. Rix +3
A hot, dusty torus located around the outer edge of the broad-line region of AGNs is a fundamental ingredient in unified AGN models. While the existence of circumnuclear dust aroun…
Ages of Star Clusters in the Tidal Tails of Merging Galaxies
A. J. Mulia, R. Chandar, B. C. Whitmore
We study the stellar content in the tidal tails of three nearby merging galaxies, NGC 520, NGC 2623, and NGC 3256, using BVI imaging taken with the Advanced Camera for Surveys on b…