Search Publications
Molecules with ALMA at Planet-forming Scales (MAPS). I. Program Overview and Highlights
Zhang, Ke; Wilner, David J.; Ménard, François +35 more
Planets form and obtain their compositions in dust- and gas-rich disks around young stars, and the outcome of this process is intimately linked to the disk chemical properties. The distributions of molecules across disks regulate the elemental compositions of planets, including C/N/O/S ratios and metallicity (O/H and C/H), as well as access to wat…
California Legacy Survey. II. Occurrence of Giant Planets beyond the Ice Line
Henry, Gregory W.; Knutson, Heather A.; Kane, Stephen R. +20 more
We used high-precision radial velocity measurements of FGKM stars to determine the occurrence of giant planets as a function of orbital separation spanning 0.03-30 au. Giant planets are more prevalent at orbital distances of 1-10 au compared to orbits interior or exterior of this range. The increase in planet occurrence at ~1 au by a factor of ~4 …
Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
Benoit-Lévy, A.; Bechtol, K.; Smith, M. +112 more
We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmologic analyses, and provide usage notes aimed at the broad astrophysics community. Y3 GOLD improves on previous releases from DES, Y1 GOLD, and Data Release 1 (DES DR1), presenting an expanded and cura…
A Quick Look at the 3 GHz Radio Sky. I. Source Statistics from the Very Large Array Sky Survey
Safi-Harb, Samar; Baum, Stefi A.; O'Dea, Christopher P. +8 more
The Very Large Array Sky Survey (VLASS) is observing the entire sky north of -40° in the S band (2 GHz < ν < 4 GHz), with the highest angular resolution (2"5) of any all-sky radio continuum survey to date. VLASS will cover its entire footprint over three distinct epochs, the first of which has now been observed in full. Based on Quick Look i…
The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs
Gonzales, Eileen C.; Kiman, Rocio; Meisner, Aaron M. +50 more
We present final Spitzer trigonometric parallaxes for 361 L, T, and Y dwarfs. We combine these with prior studies to build a list of 525 known L, T, and Y dwarfs within 20 pc of the Sun, 38 of which are presented here for the first time. Using published photometry and spectroscopy as well as our own follow-up, we present an array of color-magnitud…
Molecules with ALMA at Planet-forming Scales (MAPS). V. CO Gas Distributions
Zhang, Ke; Wilner, David J.; Ménard, François +32 more
Here we present high-resolution (15-24 au) observations of CO isotopologue lines from the Molecules with ALMA on Planet-forming Scales (MAPS) ALMA Large Program. Our analysis employs observations of the (J = 2-1) and (1-0) lines of 13CO and C18O and the (J = 1-0) line of C17O for five protoplanetary disks. We retri…
The Palomar Transient Factory Core-collapse Supernova Host-galaxy Sample. I. Host-galaxy Distribution Functions and Environment Dependence of Core-collapse Supernovae
Filippenko, Alexei V.; Foley, Ryan J.; Pan, Yen-Chen +54 more
Several thousand core-collapse supernovae (CCSNe) of different flavors have been discovered so far. However, identifying their progenitors has remained an outstanding open question in astrophysics. Studies of SN host galaxies have proven to be powerful in providing constraints on the progenitor populations. In this paper, we present all CCSNe dete…
The DECam Local Volume Exploration Survey: Overview and First Data Release
Bechtol, K.; Zenteno, A.; Abbott, T. M. C. +69 more
The DECam Local Volume Exploration survey (DELVE) is a 126-night survey program on the 4 m Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile. DELVE seeks to understand the characteristics of faint satellite galaxies and other resolved stellar substructures over a range of environments in the Local Volume. DELVE will combine …
The LSST DESC DC2 Simulated Sky Survey
Aubourg, Éric; Wood-Vasey, W. Michael; Mandelbaum, Rachel +77 more
We describe the simulated sky survey underlying the second data challenge (DC2) carried out in preparation for analysis of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) by the LSST Dark Energy Science Collaboration (LSST DESC). Significant connections across multiple science domains will be a hallmark of LSST; the DC2 progra…
Statistics of 700 Individually Studied W UMa Stars
Lazarević, Sanja; Latković, Olivera; Čeki, Atila
We present a statistical study of the largest bibliographic compilation of stellar and orbital parameters of W UMa stars derived by light-curve synthesis with Roche models. The compilation includes nearly 700 individually investigated objects from over 450 distinct publications. Almost 70% of this sample is comprised of stars observed in the past …