Search Publications
Thermal Pressure in the Cold Neutral Medium of Nearby Galaxies
Smith, J. D.; Calzetti, D.; Galametz, M. +14 more
Dynamic and thermal processes regulate the structure of the multiphase interstellar medium (ISM), and ultimately establish how galaxies evolve through star formation. Thus, to constrain ISM models and better understand the interplay of these processes, it is of great interest to measure the thermal pressure (Pth) of the diffuse, neutral…
HST PanCET program: A Cloudy Atmosphere for the Promising JWST Target WASP-101b
Sanz-Forcada, J.; Ehrenreich, D.; Lecavelier des Etangs, A. +19 more
We present results from the first observations of the Hubble Space Telescope (HST) Panchromatic Comparative Exoplanet Treasury program for WASP-101b, a highly inflated hot Jupiter and one of the community targets proposed for the James Webb Space Telescope (JWST) Early Release Science (ERS) program. From a single HST Wide Field Camera 3 observatio…
Thick Disks in the Hubble Space Telescope Frontier Fields
Elmegreen, Bruce G.; Elmegreen, Debra Meloy; Tompkins, Brittany +1 more
Thick disk evolution is studied using edge-on galaxies in two Hubble Space Telescope Frontier Field Parallels. The galaxies were separated into 72 clumpy types and 35 spiral types with bulges. Perpendicular light profiles in F435W, F606W, and F814W (B, V, and I) passbands were measured at 1 pixel intervals along the major axes and fitted to sech
The Massive CO White Dwarf in the Symbiotic Recurrent Nova RS Ophiuchi
Mikołajewska, Joanna; Shara, Michael M.
If accreting white dwarfs (WDs) in binary systems are to produce type Ia supernovae (SNe Ia), they must grow to nearly the Chandrasekhar mass and ignite carbon burning. Proving conclusively that a WD has grown substantially since its birth is a challenging task. Slow accretion of hydrogen inevitably leads to the erosion, rather than the growth of …
Radio Follow-up on All Unassociated Gamma-Ray Sources from the Third Fermi Large Area Telescope Source Catalog
Edwards, Philip G.; Petrov, Leonid; Schinzel, Frank K. +1 more
The third Fermi Large Area Telescope γ-ray source catalog (3FGL) contains over 1000 objects for which there is no known counterpart at other wavelengths. The physical origin of the γ-ray emission from those objects is unknown. Such objects are commonly referred to as unassociated and mostly do not exhibit significant γ-ray flux variability. We per…
Constraints on the Distance Moduli, Helium, and Metal Abundances, and Ages of Globular Clusters from Their RR Lyrae and Non-variable Horizontal Branch Stars. II. Multiple Stellar Populations in 47 Tuc, M3, and M13
VandenBerg, Don A.; Denissenkov, Pavel A.; Kopacki, Grzegorz +1 more
We present a new set of horizontal branch (HB) models computed with the MESA stellar evolution code. The models adopt α-enhanced Asplund et al. metal mixtures and include the gravitational settling of He. They are used in our HB population synthesis tool to generate theoretical distributions of HB stars in order to describe the multiple stellar po…
Multiwavelength Study of the Star Formation in the S237 H II Region
Dewangan, L. K.; Ojha, D. K.; Zinchenko, I. +2 more
We present a detailed multiwavelength study of observations from X-ray, near-infrared, and centimeter wavelengths to probe the star formation processes in the S237 region. Multiwavelength images trace an almost sphere-like shell morphology of the region, which is filled with the 0.5-2 keV X-ray emission. The region contains two distinct environmen…
The Young L Dwarf 2MASS J11193254-1137466 Is a Planetary-mass Binary
Magnier, Eugene A.; Dupuy, Trent J.; Liu, Michael C. +1 more
We have discovered that the extremely red, low-gravity L7 dwarf 2MASS J11193254-1137466 is a 0.″14 (3.6 au) binary using Keck laser guide star adaptive optics imaging. 2MASS J11193254-1137466 has previously been identified as a likely member of the TW Hydrae Association (TWA). Using our updated photometric distance and proper motion, a kinematic a…
The AGN-Star Formation Connection: Future Prospects with JWST
Barro, Guillermo; Santini, Paola; Grogin, Norman A. +13 more
The bulk of the stellar growth over cosmic time is dominated by IR-luminous galaxies at cosmic noon (z=1{--}2), many of which harbor a hidden active galactic nucleus (AGN). We use state-of-the-art infrared color diagnostics, combining Spitzer and Herschel observations, to separate dust-obscured AGNs from dusty star-forming galaxies (SFGs) in the C…
Characterizing the Transition from Diffuse Atomic to Dense Molecular Clouds in the Magellanic Clouds with [C II], [C I], and CO
Ott, Jürgen; Hughes, Annie; Wong, Tony +8 more
We present and analyze deep Herschel/HIFI observations of the [C II] 158 µm, [C I] 609 µm, and [C I] 370 µm lines toward 54 lines of sight in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). These observations are used to determine the physical conditions of the line-emitting gas, which we use to study the trans…