Search Publications
The Megaparsec-scale Gas-sloshing Spiral in the Remnant Cool Core Cluster Abell 1763
Clarke, T. E.; Randall, S. W.; Blanton, E. L. +4 more
We present a multiwavelength study of the massive galaxy cluster Abell 1763 at redshift z = 0.231. Image analysis of a 19.6 ks Chandra archival observation reveals a cluster-wide spiral of enhanced surface brightness in the intracluster medium (ICM). While such spirals are understood to form in clusters with sloshing strong cool cores (SCCs), the …
A Comparison of Maps and Power Spectra Determined from South Pole Telescope and Planck Data
Bleem, L. E.; Stark, A. A.; George, E. M. +43 more
We study the consistency of 150 GHz data from the South Pole Telescope (SPT) and 143 GHz data from the Planck satellite over the patch of sky covered by the SPT-SZ survey. We first visually compare the maps and find that the residuals appear consistent with noise after accounting for differences in angular resolution and filtering. We then calcula…
Follow-up Imaging of Disk Candidates from the Disk Detective Citizen Science Project: New Discoveries and False Positives in WISE Circumstellar Disk Surveys
Baranec, Christoph; Riddle, Reed; Debes, John H. +17 more
The Disk Detective citizen science project aims to find new stars with excess 22 µm emission from circumstellar dust in the AllWISE data release from the Wide-field Infrared Survey Explorer. We evaluated 261 Disk Detective objects of interest with imaging with the Robo-AO adaptive optics instrument on the 1.5 m telescope at Palomar Observato…
Characterization of Stellar and Substellar Members in the Coma Berenices Star Cluster
Herczeg, Gregory J.; Jose, Jessy; Tang, Shih-Yun +3 more
We have identified stellar and substellar members in the nearby star cluster Coma Berenices, using photometry, proper motions, and distances of a combination of 2MASS, UKIDSS, URAT1, and Gaia/DR2 data. Those with Gaia/DR2 parallax measurements provide the most reliable sample to constrain the distance, averaging 86.7 pc with a dispersion of 7.1 pc…
Discovery of an Extremely Luminous Dust-obscured Galaxy Observed with SDSS, WISE, JCMT, and SMA
Ueda, Junko; Kawabe, Ryohei; Saito, Toshiki +5 more
We present the discovery of an extremely luminous dust-obscured galaxy (DOG) at z spec = 3.703, WISE J101326.25+611220.1. This DOG is selected as a candidate of extremely luminous infrared (IR) galaxies based on the photometry from the Sloan Digital Sky Survey and Wide-field Infrared Survey Explorer. In order to derive its accurate IR l…
A Study of X-Ray Emission of Galaxies Hosting Molecular Outflows (MOX Sample)
Gandhi, Poshak; Ricci, Claudio; Guainazzi, Matteo +5 more
We have carried out an extensive X-ray spectral analysis of a sample of galaxies exhibiting molecular outflows (MOX sample) to characterize the X-ray properties and investigate the effect of active galactic nuclei (AGNs) on the dynamical properties of the molecular outflows (MOs). We find that the X-ray bolometric correction (L 2-10 keV…
The Initial Mass Function in the Coma Berenices Dwarf Galaxy from Deep Near-infrared HST Observations
Brown, Thomas M.; Gennaro, Mario; Conroy, Charlie +6 more
We use deep Hubble Space Telescope (HST) WFC3/IR imaging to study the initial mass function (IMF) of the ultra-faint dwarf galaxy Coma Berenices (Com Ber). Our observations reach the lowest stellar mass ever probed in a resolved galaxy, with 50% completeness at ∼0.17 M ⊙. Unresolved background galaxies, however, limit our purity below ∼…
A Thorough View of the Nuclear Region of NGC 253: Combined Herschel, SOFIA, and APEX Data Set
Menten, K. M.; Güsten, R.; Requena-Torres, M. A. +5 more
We present a large set of spectral lines detected in the 40″ central region of the starburst galaxy NGC 253. Observations were obtained with the three instruments SPIRE, PACS, and HIFI on board the Herschel Space Observatory, upGREAT on board the SOFIA airborne observatory, and the ground-based Atacama Pathfinder EXperiment telescope. Combining th…
Chemo-kinematic Ages of Eccentric-planet-hosting M Dwarf Stars
Muirhead, Philip S.; Veyette, Mark J.
The M dwarf stars are exciting targets for exoplanet investigations; however, their fundamental stellar properties are difficult to measure. Perhaps the most challenging property is stellar age. Once on the main sequence, M dwarfs change imperceptibly in their temperature and luminosity, necessitating novel statistical techniques for estimating th…
Photospheric and Coronal Abundances in an X8.3 Class Limb Flare
Culhane, J. L.; Doschek, G. A.; Warren, H. P. +3 more
We analyze solar elemental abundances in coronal post-flare loops of an X8.3 flare (SOL2017-09-10T16:06) observed on the west limb on 2017 September 10 near 18 UT using spectra recorded by the Extreme-ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft. The abundances in the corona can differ from photospheric abundances due to the fir…