Search Publications
Big Three Dragons: A z = 7.15 Lyman-break galaxy detected in [O III] 88 µm, [C II] 158 µm, and dust continuum with ALMA
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +18 more
We present new ALMA observations and physical properties of a Lyman break galaxy at z = 7.15. Our target, B14-65666, has a bright ultra-violet (UV) absolute magnitude, MUV ≈ -22.4, and has been spectroscopically identified in Lyα with a small rest-frame equivalent width of ≈4 Å. A previous Hubble Space TElescope (HST) image has shown th…
A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies
Sandstrom, Karin M.; Leroy, Adam K.; Salim, Samir +8 more
We present an atlas of ultraviolet and infrared images of ∼15,750 local (d ≲ 50 Mpc) galaxies, as observed by NASA’s Wide-field Infrared Survey Explorer (WISE) and Galaxy Evolution Explorer (GALEX) missions. These maps have matched resolution (FWHM 7.″5 and 15″), matched astrometry, and a common procedure for background removal. We demonstrate tha…
A Large Catalog of Accurate Distances to Local Molecular Clouds: The Gaia DR2 Edition
Alves, João; Speagle, Joshua S.; Zucker, Catherine +4 more
We present a uniform catalog of accurate distances to local molecular clouds informed by the Gaia DR2 data release. Our methodology builds on that of Schlafly et al. First, we infer the distance and extinction to stars along sightlines toward the clouds using optical and near-infrared photometry. When available, we incorporate knowledge of the ste…
SkyMapper Southern Survey: Second data release (DR2)
Wolf, Christian; Schmidt, Brian P.; Onken, Christopher A. +6 more
We present the second data release (DR2) of the SkyMapper Southern Survey, a hemispheric survey carried out with the SkyMapper Telescope at Siding Spring Observatory in Australia, using six optical filters: u, v, g, r, i, z. DR2 is the first release to go beyond the ∼18 mag (10σ) limit of the Shallow Survey released in the first data release (DR1)…
Probing Galactic haloes with fast radio bursts
Prochaska, J. Xavier; Zheng, Yong
The precise localization (<1 arcsec) of multiple fast radio bursts (FRBs) to z > 0.1 galaxies has confirmed that the dispersion measures (DMs) of these enigmatic sources afford a new opportunity to probe the diffuse ionized gas around and in between galaxies. In this manuscript, we examine the signatures of gas in dark matter haloes (aka hal…
Uncovering the birth of the Milky Way through accurate stellar ages with Gaia
Ruiz-Lara, Tomás; Hill, Vanessa; Monelli, Matteo +4 more
Knowledge of the ages of the stars formed over a galaxy's lifetime is fundamental to an understanding of its formation and evolution. However, stellar ages are difficult to obtain since they cannot be measured from observations, but require comparison with stellar models1. Alternatively, age distributions can be derived by applying the …
An Embedded X-Ray Source Shines through the Aspherical AT 2018cow: Revealing the Inner Workings of the Most Luminous Fast-evolving Optical Transients
Berger, E.; Hurley, K.; Götz, D. +42 more
We present the first extensive radio to γ-ray observations of a fast-rising blue optical transient, AT 2018cow, over its first ∼100 days. AT 2018cow rose over a few days to a peak luminosity L pk ∼ 4 × 1044 erg s-1, exceeding that of superluminous supernovae (SNe), before declining as L ∝ t -2. Initial s…
Gaia Data Release 2. Specific characterisation and validation of all-sky Cepheids and RR Lyrae stars
Szabados, L.; Audard, M.; Rimoldini, L. +21 more
Context. The Gaia second Data Release (DR2) presents a first mapping of full-sky RR Lyrae stars and Cepheids observed by the spacecraft during the initial 22 months of science operations.
Aims: The Specific Objects Study (SOS) pipeline, developed to validate and fully characterise Cepheids and RR Lyrae stars (SOS Cep&RRL) observed by Gaia…
The Most Luminous Supernovae
Gal-Yam, Avishay
Over a decade ago, a group of supernova explosions with peak luminosities far exceeding (often by >100 times) those of normal events has been identified. These superluminous supernovae (SLSNe) have been a focus of intensive study. I review the accumulated observations and discuss the implications for the physics of these extreme explosions. SLS…
Gaia Data Release 2. Properties and validation of the radial velocities
Smith, M.; Gosset, E.; Allende Prieto, C. +52 more
Context. For Gaia DR2, 280 million spectra collected by the Radial Velocity Spectrometer instrument on board Gaia were processed, and median radial velocities were derived for 9.8 million sources brighter than GRVS = 12 mag.
Aims: This paper describes the validation and properties of the median radial velocities published in Gaia D…