Search Publications
Sizes of Lensed Lower-luminosity z = 4-8 Galaxies from the Hubble Frontier Field Program
Oesch, P. A.; Bouwens, R. J.; Illingworth, G. D. +3 more
We constrain the rest-UV size-luminosity relation for star-forming galaxies at z ~ 4 and z ~ 6, 7, and 8 identified behind clusters from the Hubble Frontier Fields (HFF) program. The size-luminosity relation is key to deriving accurate luminosity functions (LF) for faint galaxies. Making use of the latest lensing models and full data set for these…
High Equivalent Width of Hα+[N II] Emission in z 8 Lyman-break Galaxies from IRAC 5.8 µm Observations: Evidence for Efficient Lyman-continuum Photon Production in the Epoch of Reionization
Illingworth, Garth D.; Labbé, Ivo; Bouwens, Rychard J. +3 more
We measure, for the first time, the median equivalent width (EW) of Hα+[N II] in star-forming galaxies at z ~ 8. Our estimate leverages the unique photometric depth of the Spitzer/IRAC 5.8 µm band mosaics (probing ≈5500-7100 Å at z ~ 8) of the GOODS Reionization Era Wide Area Treasury from Spitzer (GREATS) program. We median-stacked the stam…
Gas Disk Sizes from CO Line Observations: A Test of Angular Momentum Evolution
Wilner, David J.; Tabone, Benoît; Andrews, Sean M. +7 more
The size of a disk encodes important information about its evolution. Combining new Submillimeter Array observations with archival Atacama Large Millimeter/submillimeter Array data, we analyze millimeter continuum and CO emission line sizes for a sample of 44 protoplanetary disks around stars with masses of 0.15-2 M ⊙ in several nearby …
Cosmological Results from the RAISIN Survey: Using Type Ia Supernovae in the Near Infrared as a Novel Path to Measure the Dark Energy Equation of State
Kirshner, R. P.; Smith, M.; Nichol, R. C. +26 more
Type Ia supernovae (SNe Ia) are more precise standardizable candles when measured in the near-infrared (NIR) than in the optical. With this motivation, from 2012 to 2017 we embarked on the RAISIN program with the Hubble Space Telescope (HST) to obtain rest-frame NIR light curves for a cosmologically distant sample of 37 SNe Ia (0.2 ≲ z ≲ 0.6) disc…
ALMA 200 pc Imaging of a z 7 Quasar Reveals a Compact, Disk-like Host Galaxy
Carilli, Chris; Fan, Xiaohui; Neeleman, Marcel +10 more
We present 0.″035 resolution (~200 pc) imaging of the 158 µm [C II] line and the underlying dust continuum of the z = 6.9 quasar J234833.34-305410.0. The 18 hour Atacama Large Millimeter/submillimeter Array observations reveal extremely compact emission (diameter ~1 kpc) that is consistent with a simple, almost face-on, rotation-supported di…
First Results from the JWST Early Release Science Program Q3D: Turbulent Times in the Life of a z 3 Extremely Red Quasar Revealed by NIRSpec IFU
Johnson, Sean D.; Lützgendorf, Nora; Maiolino, Roberto +20 more
Extremely red quasars, with bolometric luminosities exceeding 1047 erg s-1, are a fascinating high-redshift population that is absent in the local universe. They are the best candidates for supermassive black holes accreting at rates at or above the Eddington limit, and they are associated with the most rapid and powerful out…
Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies
Finkelstein, Steven L.; Casey, Caitlin M.; Kartaltepe, Jeyhan S. +22 more
The 2 mm Mapping Obscuration to Reionization with ALMA (MORA) Survey was designed to detect high-redshift (z ≳ 4), massive, dusty star-forming galaxies (DSFGs). Here we present two likely high-redshift sources, identified in the survey, whose physical characteristics are consistent with a class of optical/near-infrared (OIR)-invisible DSFGs found …
The K2 Galactic Archaeology Program Data Release 3: Age-abundance Patterns in C1-C8 and C10-C18
Lewis, Geraint F.; Vanderburg, Andrew; Chaplin, William J. +28 more
We present the third and final data release of the K2 Galactic Archaeology Program (K2 GAP) for Campaigns C1-C8 and C10-C18. We provide asteroseismic radius and mass coefficients, κ R and κ M , for ~19,000 red giant stars, which translate directly to radius and mass given a temperature. As such, K2 GAP DR3 represents the l…
The X-Ray and Radio Loud Fast Blue Optical Transient AT2020mrf: Implications for an Emerging Class of Engine-driven Massive Star Explosions
Kulkarni, S. R.; Chandra, Poonam; Perley, Daniel A. +9 more
We present AT2020mrf (SRGe J154754.2+443907), an extra-galactic (z = 0.1353) fast blue optical transient (FBOT) with a rise time of t g,rise = 3.7 days and a peak luminosity of M g,peak = -20.0. Its optical spectrum around peak shows a broad (v ~ 0.1c) emission feature on a blue continuum (T ~ 2 × 104 K), which b…
A Disk Instability Model for the Quasi-periodic Eruptions of GSN 069
Li, Shuang-Liang; Miniutti, Giovanni; Cao, Xinwu +2 more
GSN 069 is a recently discovered quasi-periodic eruption (QPE) source recurring about every 9 hr. The mechanism for the QPEs of GSN 069 is still unclear. In this work, a disk instability model is constructed to explain GSN 069 based on Pan et al. (PLC21), where the authors proposed a toy model for the repeating changing-look active galactic nuclei…