Search Publications
CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales
Smail, I.; Pérez-Fournon, I.; Ivison, R. J. +22 more
Using the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z = 3.63 galaxy H-ATLAS J083051.0+013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS). We present 0.″2-0.″4 resolution images o…
Methane on Mars: New insights into the sensitivity of CH4 with the NOMAD/ExoMars spectrometer through its first in-flight calibration
Vandaele, Ann Carine; Thomas, Ian; Liuzzi, Giuliano +9 more
The Nadir and Occultation for MArs Discovery instrument (NOMAD), onboard the ExoMars Trace Gas Orbiter (TGO) spacecraft was conceived to observe Mars in solar occultation, nadir, and limb geometries, and will be able to produce an outstanding amount of diverse data, mostly focused on properties of the atmosphere. The infrared channels of the instr…
Observations of SN 2017ein Reveal Shock Breakout Emission and a Massive Progenitor Star for a Type Ic Supernova
Bi, Shaolan; Rest, A.; Baron, E. +23 more
We present optical and ultraviolet observations of nearby Type Ic supernova (SN Ic) SN 2017ein, as well as a detailed analysis of its progenitor properties from both the early-time observations and the prediscovery Hubble Space Telescope (HST) images. The optical light curves started from within 1 day to ∼275 days after explosion, and optical spec…
Using APOGEE Wide Binaries to Test Chemical Tagging with Dwarf Stars
Majewski, Steven R.; Hayes, Christian R.; Anguiano, Borja +4 more
Stars of a common origin are thought to have similar, if not nearly identical, chemistry. Chemical tagging seeks to exploit this fact to identify Milky Way subpopulations through their unique chemical fingerprints. In this work, we compare the chemical abundances of dwarf stars in wide binaries to test the abundance consistency of stars of a commo…
Triage of astrometric binaries - how to find triple systems and dormant black hole secondaries in the Gaia orbits
Mazeh, T.; Holl, B.; Faigler, S. +1 more
Preparing for the expected wealth of Gaia detections, we consider here a simple algorithm for classifying unresolved astrometric binaries with main-sequence (MS) primary into three classes: binaries with a probable MS secondary, with two possible values for the mass ratio; probable hierarchical triple MS systems with an astrometric secondary as a …
Stars that Move Together Were Born Together
Conroy, Charlie; Ting, Yuan-Sen; Brown, Anthony G. A. +3 more
It is challenging to reliably identify stars that were born together outside of actively star-forming regions and bound stellar systems. However, conatal stars should be present throughout the Galaxy, and their demographics can shed light on the clustered nature of star formation and the dynamical state of the disk. In previous work we presented a…
A Triple AGN in a Mid-infrared Selected Late-stage Galaxy Merger
Ellison, Sara L.; Ricci, Claudio; Blecha, Laura +11 more
The coevolution of galaxies and the supermassive black holes (SMBHs) at their centers via hierarchical galaxy mergers is a key prediction of ΛCDM cosmology. As gas and dust are funneled to the SMBHs during the merger, the SMBHs light up as active galactic nuclei (AGNs). In some cases, a merger of two galaxies can encounter a third galaxy, leading …
Constraining nuclear star cluster formation using MUSE-AO observations of the early-type galaxy FCC 47
Coccato, Lodovico; Fahrion, Katja; Leaman, Ryan +12 more
Context. Nuclear star clusters (NSCs) are found in at least 70% of all galaxies, but their formation path is still unclear. In the most common scenarios, NSCs form in-situ from the galaxy's central gas reservoir, through the merging of globular clusters (GCs), or through a combination of both.
Aims: As the scenarios pose different expectation…
The mass-loss, expansion velocities, and dust production rates of carbon stars in the Magellanic Clouds
Goldman, Steven R.; Boyer, Martha L.; van Loon, Jacco Th +5 more
The properties of carbon stars in the Magellanic Clouds (MCs) and their total dust production rates are predicted by fitting their spectral energy distributions (SED) over pre-computed grids of spectra reprocessed by dust. The grids are calculated as a function of the stellar parameters by consistently following the growth for several dust species…
Catalog of quasars from the Kilo-Degree Survey Data Release 3
Brescia, M.; Napolitano, N. R.; Maddox, N. +5 more
We present a catalog of quasars selected from broad-band photometric ugri data of the Kilo-Degree Survey Data Release 3 (KiDS DR3). The QSOs are identified by the random forest (RF) supervised machine learning model, trained on Sloan Digital Sky Survey (SDSS) DR14 spectroscopic data. We first cleaned the input KiDS data of entries with excessively…