Search Publications
A Catalog of Cool Dwarf Targets for the Transiting Exoplanet Survey Satellite
Muirhead, Philip S.; Lépine, Sébastien; Mann, Andrew W. +5 more
We present a catalog of cool dwarf targets (V-J> 2.7, T eff ≲ 4000 K) and their stellar properties for the upcoming Transiting Exoplanet Survey Satellite (TESS), for the purpose of determining which cool dwarfs should be observed using two minute observations. TESS has the opportunity to search tens of thousands of nearby, cool, late…
The Disk Substructures at High Angular Resolution Project (DSHARP). IV. Characterizing Substructures and Interactions in Disks around Multiple Star Systems
Wilner, David J.; Andrews, Sean M.; Guzmán, Viviana V. +11 more
To characterize the substructures induced in protoplanetary disks by the interaction between stars in multiple systems, we study the 1.25 mm continuum and the 12CO(J = 2-1) spectral line emission of the triple systems HT Lup and AS 205, at scales of ≈5 au, as part of the “Disk Substructures at High Angular Resolution Project” (DSHARP). …
Snake in the Clouds: a new nearby dwarf galaxy in the Magellanic bridge*
Casey, Andrew R.; Erkal, Denis; Belokurov, Vasily +9 more
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large (LMC) and the Small Magellanic Clouds (SMC). Hydrus 1 is a mildly elliptical ultrafaint system with luminosity MV ∼ -4.7 and size 53 ± 3 pc, located 28 kpc from the Sun and 24 kpc from the LMC. From spectroscopy of ∼30 member stars, we mea…
The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters
Strader, Jay; Maccarone, Thomas J.; Seth, Anil C. +8 more
We present the results of an ultradeep, comprehensive radio continuum survey for the accretion signatures of intermediate-mass black holes (IMBHs) in globular clusters (GCs). The sample, imaged with the Karl G. Jansky Very Large Array and the Australia Telescope Compact Array, comprises 50 Galactic GCs. No compelling evidence for an IMBH is found …
A Survey of Atomic Carbon [C I] in High-redshift Main-sequence Galaxies
Dickinson, Mark E.; Lee, Min-Young; Daddi, Emanuele +15 more
We present the first results of an Atacama Large Millimeter Array survey of the lower fine-structure line of atomic carbon [C I] {(}3{P}1 {--}{}3{P}0) in far-infrared-selected galaxies on the main sequence at z ∼ 1.2 in the COSMOS field. We compare our sample with a comprehensive compilation of data avai…
Halo substructure in the SDSS-Gaia catalogue: streams and clumps
Myeong, G. C.; Evans, N. W.; Belokurov, V. +2 more
We use the Sloan Digital Sky Survey (SDSS)-Gaia Catalogue to identify six new pieces of halo substructure. SDSS-Gaia is an astrometric catalogue that exploits SDSS data release 9 to provide first epoch photometry for objects in the Gaia source catalogue. We use a version of the catalogue containing 245 316 stars with all phase-space coordinates wi…
Multiple Disk Gaps and Rings Generated by a Single Super-Earth. II. Spacings, Depths, and Number of Gaps, with Application to Real Systems
Dong, Ruobing; Li, Hui; Chiang, Eugene +1 more
The Atacama Large Millimeter/submillimeter Array (ALMA) has found multiple dust gaps and rings in a number of protoplanetary disks in continuum emission at millimeter wavelengths. The origin of such structures is under debate. Recently, we documented how one super-Earth planet can open multiple (up to five) dust gaps in a disk with low viscosity (…
The XXL Survey. XX. The 365 cluster catalogue
Chiappetti, L.; Altieri, B.; Valtchanov, I. +54 more
Context. In the currently debated context of using clusters of galaxies as cosmological probes, the need for well-defined cluster samples is critical.
Aims: The XXL Survey has been specifically designed to provide a well characterised sample of some 500 X-ray detected clusters suitable for cosmological studies. The main goal of present articl…
GRB 170817A Associated with GW170817: Multi-frequency Observations and Modeling of Prompt Gamma-Ray Emission
Lyutikov, M.; Minaev, P. Yu.; Pozanenko, A. S. +7 more
We present our observations of electromagnetic transients associated with GW170817/GRB 170817A using optical telescopes of Chilescope observatory and Big Scanning Antenna (BSA) of Pushchino Radio Astronomy Observatory at 110 MHz. The Chilescope observatory detected an optical transient of ∼19m on the third day in the outskirts of the ga…
Mapping Distances across the Perseus Molecular Cloud Using CO Observations, Stellar Photometry, and Gaia DR2 Parallax Measurements
Speagle, Joshua S.; Zucker, Catherine; Finkbeiner, Douglas P. +4 more
We present a new technique to determine distances to major star-forming regions across the Perseus Molecular Cloud, using a combination of stellar photometry, astrometric data, and 12CO spectral-line maps. Incorporating the Gaia DR2 parallax measurements when available, we start by inferring the distance and reddening to stars from thei…