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454 papers · 1 filter
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: III. Horizontal Branch Morphology
R. Wagner-Kaiser, Dougal Mackey, Ata Sarajedini +5
We leverage new high-quality data from Hubble Space Telescope program GO-14164 to explore the variation in horizontal branch morphology among globular clusters in the Large Magella…
A Model for Data Citation in Astronomical Research using Digital Object Identifiers (DOIs)
Jenny Novacescu, Joshua E. G. Peek, Sarah Weissman +3
Standardizing and incentivizing the use of digital object identifiers (DOIs) to aggregate and identify both data analyzed and data generated by a research project will advance the…
Discovery of an Ultraviolet Counterpart to an Ultra-Fast X-ray Outflow in the Quasar PG1211+143
Gerard A. Kriss, Julia C. Lee, Ashkbiz Danehkar +5
We observed the quasar PG1211+143 using the Cosmic Origins Spectrograph on the Hubble Space Telescope in April 2015 as part of a joint campaign with the Chandra X-ray Observatory a…
The HR 4796A Debris System: Discovery of Extensive Exo-Ring Dust Material
Glenn Schneider, John H. Debes, Carol A. Grady +6
The optically and IR bright, and starlight-scattering, HR 4796A ring-like debris disk is one of the most (and best) studied exoplanetary debris systems. The presence of a yet-undet…
Hubble Space Telescope Trigonometric Parallax of Polaris B, Companion of the Nearest Cepheid
Howard E. Bond, Edmund P. Nelan, Nancy Remage Evans +2
Polaris, the nearest and brightest Cepheid, is a potential anchor point for the Leavitt period-luminosity relation. However, its distance is a matter of contention, with recent adv…
Anatomy of the AGN in NGC 5548 IX. Photoionized emission features in the soft X-ray spectra
Junjie Mao, J. S. Kaastra, M. Mehdipour +10
The X-ray narrow emission line region (NELR) of the archetypal Seyfert 1 galaxy NGC\,5548 has been interpreted as a single-phase photoionized plasma that is absorbed by some of the…