Search Publications
A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies
Sanders, D. B.; Surace, J. A.; Inami, H. +20 more
We present an analysis of [O I]63, [O III]88, [N II]122, and [C II]158 far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR…
First Evidence of Running Cosmic Vacuum: Challenging the Concordance Model
Solà, Joan; Gómez-Valent, Adrià; de Cruz Pérez, Javier
Despite the fact that a rigid {{Λ }}-term is a fundamental building block of the concordance ΛCDM model, we show that a large class of cosmological scenarios with dynamical vacuum energy density {ρ }{{Λ }} together with a dynamical gravitational coupling G or a possible non-conservation of matter, are capable of seriously challenging th…
A millimeter Continuum Size-Luminosity Relationship for Protoplanetary Disks
Wilner, David J.; Andrews, Sean M.; Birnstiel, Tilman +1 more
We present a survey at subarcsecond resolution of the 340 GHz dust continuum emission from 50 nearby protoplanetary disks, based on new and archival observations with the Submillimeter Array. The observed visibility data were modeled with a simple prescription for the radial surface brightness profile. The results were used to extract intuitive, e…
A Consistent Retrieval Analysis of 10 Hot Jupiters Observed in Transmission
Aigrain, S.; Irwin, P. G. J.; Sing, D. K. +1 more
We present a consistent optimal estimation retrieval analysis of 10 hot Jupiter exoplanets, each with transmission spectral data spanning the visible to near-infrared wavelength range. Using the NEMESIS radiative transfer and retrieval tool, we calculate a range of possible atmospheric states for WASP-6b, WASP-12b, WASP-17b, WASP-19b, WASP-31b, WA…
Three Radial Gaps in the Disk of TW Hydrae Imaged with SPHERE
Quanz, S. P.; Avenhaus, H.; Dominik, C. +24 more
We present scattered light images of the TW Hya disk performed with the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument in Polarimetric Differential Imaging mode at 0.63, 0.79, 1.24, and 1.62 µm. We also present H2/H3-band angular differential imaging (ADI) observations. Three distinct radial depressions in the polarized int…
Lyα Profile, Dust, and Prediction of Lyα Escape Fraction in Green Pea Galaxies
Leitherer, Claus; Wofford, Aida; Tilvi, V. +7 more
We studied Lyman-α (Lyα) escape in a statistical sample of 43 Green Peas with HST/COS Lyα spectra. Green Peas are nearby star-forming galaxies with strong [O III]λ5007 emission lines. Our sample is four times larger than the previous sample and covers a much more complete range of Green Pea properties. We found that about two-thirds of Green Peas …
Gaia Reveals a Metal-rich, in situ Component of the Local Stellar Halo
Conroy, Charlie; Bonaca, Ana; Hopkins, Philip F. +2 more
We use the first Gaia data release, combined with the RAVE and APOGEE spectroscopic surveys, to investigate the origin of halo stars within ≲ 3 kpc from the Sun. We identify halo stars kinematically as moving at a relative speed of at least 220 km s-1 with respect to the local standard of rest. These stars are generally less metal-rich …
PS16dtm: A Tidal Disruption Event in a Narrow-line Seyfert 1 Galaxy
Berger, E.; Chornock, R.; Nicholl, M. +6 more
We present observations of PS16dtm (also known as SN 2016ezh), a luminous transient that occurred at the nucleus of a narrow-line Seyfert 1 galaxy hosting a 106 M ⊙ black hole. The light curve shows that PS16dtm exhibited a plateau phase for ∼100 days, during which it showed no color evolution, maintained a blackbody temperat…
The Constant Average Relationship between Dust-obscured Star Formation and Stellar Mass from z = 0 to z = 2.5
Casey, Caitlin M.; Cybulski, Ryan; Yun, Min S. +3 more
The total star formation budget of galaxies consists of the sum of the unobscured star formation, as observed in the rest-frame ultraviolet (UV), together with the obscured component that is absorbed and re-radiated by dust grains in the infrared. We explore how the fraction of obscured star formation depends on stellar mass for mass-complete samp…
FRB 121102 Is Coincident with a Star-forming Region in Its Host Galaxy
Ransom, S. M.; Chatterjee, S.; Cordes, J. M. +16 more
We present optical, near-infrared, and mid-infrared imaging of the host galaxy of FRB 121102 with the Gemini North telescope, the Hubble Space Telescope, and the Spitzer Space Telescope. The FRB 121102 host galaxy is resolved, revealing a bright star-forming region located in the outskirts of the irregular, low-metallicity dwarf galaxy. The star-f…