Search Publications
Missions
Journals
Publication Years
Swift spectra of AT2018cow: a white dwarf tidal disruption event?
Wu, Kinwah; Cenko, S. Bradley; Levan, Andrew +19 more
The bright transient AT2018cow has been unlike any other known type of transient. Its high brightness, rapid rise and decay, and initially nearly featureless spectrum are unprecedented and difficult to explain using models for similar burst sources. We present evidence for faint γ-ray emission continuing for at least 8 d, and featureless spectra i…
Strong lensing models of eight CLASH clusters from extensive spectroscopy: Accurate total mass reconstructions in the cores
Demarco, R.; Zitrin, A.; Grillo, C. +19 more
We carried out a detailed strong lensing analysis of a sub-sample of eight galaxy clusters of the Cluster Lensing And Supernova survey with Hubble (CLASH) in the redshift range of zcluster = [0.23 - 0.59] using extensive spectroscopic information, primarily from the Multi Unit Spectroscopic Explorer (MUSE) archival data and complemented…
Toward Precision Tests of General Relativity with Black Hole X-Ray Reflection Spectroscopy
Tripathi, Ashutosh; Abdikamalov, Askar B.; Ayzenberg, Dimitry +5 more
Astrophysical black hole systems are the ideal laboratories for testing Einstein’s theory of gravity in the strong field regime. We have recently developed a framework that uses the reflection spectrum of black hole systems to perform precision tests of general relativity by testing the Kerr black hole hypothesis. In this paper, we analyze XMM-New…
Photometric Redshifts and Stellar Masses for Galaxies from the DESI Legacy Imaging Surveys
Kong, Xu; Zou, Hu; Zhou, Xu +1 more
We present a catalog of photometric redshifts and stellar masses for galaxies from imaging surveys serving the Dark Energy Spectroscopic Instrument project. The imaging footprints cover an area of over 14,000 deg2. This catalog contains about 0.17 billion morphologically classified galaxies with r < 23 mag. It covers the redshift ran…
Stellar population of Sco OB2 revealed by Gaia DR2 data
Micela, G.; Sciortino, S.; Pillitteri, I. +2 more
Context. The Sco OB2 association is the nearest OB association, extending over approximately 2000 square degrees on the sky. Only its brightest and most massive members are already known (from HIPPARCOS) across its entire size, while studies of its lower mass population refer only to small portions of its extent.
Aims: In this work we exploit…
The natural history of `Oumuamua
Bannister, Michele T.; Guilbert-Lepoutre, Aurélie; Meech, Karen J. +12 more
The discovery of the first interstellar object passing through the Solar System, 1I/2017 U1 (`Oumuamua), provoked intense and continuing interest from the scientific community and the general public. The faintness of `Oumuamua, together with the limited time window within which observations were possible, constrained the information available on i…
TESS Reveals that the Nearby Pisces-Eridanus Stellar Stream is only 120 Myr Old
Wright, Jason T.; Cummings, Jeffrey D.; Mamajek, Eric E. +2 more
Pisces-Eridanus (Psc-Eri), a nearby (d ≃ 80-226 pc) stellar stream stretching across ≈120° of the sky, was recently discovered with Gaia data. The stream was claimed to be ≈1 Gyr old, which would make it an exceptional discovery for stellar astrophysics, as star clusters of that age are rare and tend to be distant, limiting their utility as benchm…
Forecasting the Structure and Orientation of Earthbound Coronal Mass Ejections
Kilpua, E. K. J.; Temmer, M.; Mays, M. L. +1 more
Coronal Mass Ejections (CMEs) are the key drivers of strong to extreme space weather storms at the Earth that can have drastic consequences for technological systems in space and on ground. The ability of a CME to drive geomagnetic disturbances depends crucially on the magnetic structure of the embedded flux rope, which is thus essential to predic…
Spitzer Phase Curves of KELT-1b and the Signatures of Nightside Clouds in Thermal Phase Observations
Fortney, Jonathan J.; Showman, Adam P.; Marley, Mark S. +3 more
We observed two full orbital phase curves of the transiting brown dwarf KELT-1b, at 3.6 and 4.5 µm, using the Spitzer Space Telescope. Combined with previous eclipse data from Beatty et al., we strongly detect KELT-1b’s phase variation as a single sinusoid in both bands, with amplitudes of 964 ± 36 ppm at 3.6 µm and 979 ± 54 ppm at 4.5…
Barium and related stars, and their white-dwarf companions. I. Giant stars
Jorissen, A.; Escorza, A.; Boffin, H. M. J. +4 more
Context. Barium and S stars without technetium are red giants and are suspected of being members of binary systems due to their overabundances in heavy elements. These elements are produced by the s-process of nucleosynthesis, despite the stars not being evolved enough to be able to activate the s-process in their interiors. A companion formerly o…