Search Publications
Bayesian Inference of Globular Cluster Properties Using Distribution Functions
Webb, Jeremy J.; Eadie, Gwendolyn M.; Rosenthal, Jeffrey S.
We present a Bayesian inference approach to estimating the cumulative mass profile and mean-squared velocity profile of a globular cluster (GC) given the spatial and kinematic information of its stars. Mock GCs with a range of sizes and concentrations are generated from lowered-isothermal dynamical models, from which we test the reliability of the…
X-Ray Redshifts of Obscured Chandra Source Catalog Active Galactic Nuclei
Buchner, Johannes; Peca, Alessandro; Cappelluti, Nico +2 more
We have computed obscured active galactic nuclei (AGN) redshifts using the XZ method, adopting a broad treatment in which we employed a wide-ranging data set and worked primarily at the XZ counts sensitivity threshold, culminating with a redshift catalog containing 121 sources that lack documented redshifts. We considered 363 obscured AGN from the…
Double Shells of the Planetary Nebula NGC 7009 Minor Axis
Otsuka, Masaaki; Hyung, Siek; Lee, Seong-Jae
We analyzed the minor-axis spectra of the elliptical planetary nebula (PN) NGC 7009 observed with Keck HIRES with a 0.″862 × 10″ slit placed at about 7.″5 and 10″ away from the center and a 0.″862 × 14″ slit at the center. The mean densities derived from the integrated [S II] 6716/6731 Å fluxes along the Keck HIRES slit length indicate a density r…
The Solar Wind at (16) Psyche: Predictions for a Metal World
Collinson, Glyn A.; Chen, Li-Jen; Jian, Lan K. +1 more
NASA's Psyche spacecraft will carry a magnetometer to main-belt asteroid (16) Psyche to search for remanent magnetic fields, and to attempt electromagnetic sounding of the interior. However, the Psyche spacecraft does not carry an instrument to measure solar wind plasmas. We thus combine data from five missions that have measured the solar wind at…
A Spectroscopic View of the JWST/GTO Strong Lensing Cluster A1489
Diaferio, Antonaldo; Geller, Margaret J.; Rines, Kenneth J. +1 more
We discuss a spectroscopic survey of the strong lensing cluster A1489 that includes redshifts for 195 cluster members along with central velocity dispersions for 188 cluster members. The caustic technique applied to the redshift survey gives the dynamical parameters M 200 = (1.25 ± 0.09) × 1015 M ⊙, R 200
Emission Line Galaxies in the SHARDS Hubble Frontier Fields. II. Limits on Lyman-continuum Escape Fractions of Lensed Emission Line Galaxies at Redshifts 2 < z < 3.5
Pérez-González, Pablo G.; Koekemoer, Anton M.; Conselice, Christopher J. +10 more
We present an investigation of escape fractions of UV photons from a unique sample of lensed low-mass emission line-selected galaxies at z < 3.5 found in the SHARDS Hubble Frontier Fields medium-band survey. We have used this deep imaging survey to locate 42 relatively low-mass galaxies down to log (M */M ⊙) = 7 in the red…
Dense Molecular Clouds in the Crab Supernova Remnant
Bentley, Rory O.; Fabian, A. C.; Combes, F. +7 more
Molecular emission was imaged with ALMA from numerous components near and within bright H2-emitting knots and absorbing dust globules in the Crab Nebula. These observations provide a critical test of how energetic photons and particles produced in a young supernova remnant interact with gas, cleanly differentiating between competing mod…
The Detection of Deuterated Water in the Large Magellanic Cloud with ALMA
Oliveira, Joana M.; Chen, C. -H. Rosie; van Loon, Jacco Th. +10 more
We report the first detection of deuterated water (HDO) toward an extragalactic hot core. The HDO 211-212 line has been detected toward hot cores N 105-2 A and 2 B in the N 105 star-forming region in the low-metallicity Large Magellanic Cloud (LMC) dwarf galaxy with the Atacama Large Millimeter/submillimeter Array (ALMA). We …
Detection of Extended Millimeter Emission in the Host Galaxy of 3C 273 and Its Implications for QSO Feedback via High Dynamic Range ALMA Imaging
Saito, Toshiki; Toba, Yoshiki; Matsuoka, Yoshiki +2 more
We estimate the amount of negative feedback energy injected into the interstellar medium (ISM) of the host galaxy of 3C 273, a prototypical radio-loud quasar. We obtained 93, 233, and 343 GHz continuum images with the Atacama Large Millimeter/submillimeter Array (ALMA). After self-calibration and point-source subtraction, we reach an image dynamic…
Hubble Space Telescope Imaging of Luminous Extragalactic Infrared Transients and Variables from the Spitzer Infrared Intensive Transients Survey
Gehrz, Robert D.; Bond, Howard E.; Bally, John +6 more
The SPitzer InfraRed Intensive Transients Survey (SPIRITS) searched for luminous infrared (IR) transients and variables in nearly 200 nearby galaxies from 2014 to 2019, using the warm Spitzer telescope at 3.6 and 4.5 µm. Among the SPIRITS variables are IR-bright objects that are undetected in ground-based optical surveys. We classify them as…