Search Publications
Short GRB Host Galaxies. I. Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets
Kilpatrick, Charles D.; Smith, Nathan; Andrews, Jennifer +25 more
We present a comprehensive optical and near-infrared census of the fields of 90 short gamma-ray bursts (GRBs) discovered in 2005-2021, constituting all short GRBs for which host galaxy associations are feasible (≈60% of the total Swift short GRB population). We contribute 274 new multi-band imaging observations across 58 distinct GRBs and 26 spect…
Searching for Extremely Blue UV Continuum Slopes at z = 7-11 in JWST/NIRCam Imaging: Implications for Stellar Metallicity and Ionizing Photon Escape in Early Galaxies
Charlot, Stéphane; Chen, Zuyi; Stark, Daniel P. +4 more
The ultraviolet (UV) continuum slope (β, where f λ ∝ λ β ) of galaxies is sensitive to a variety of properties, from the metallicity and age of the stellar population to dust attenuation throughout the galaxy. Considerable attention has focused on identifying reionization-era galaxies with very blue UV slopes (β < -3). …
Comparing Tip of the Red Giant Branch Distance Scales: An Independent Reduction of the Carnegie-Chicago Hubble Program and the Value of the Hubble Constant
Riess, Adam G.; Yuan, Wenlong; Anand, Gagandeep S. +2 more
The tip of the red giant branch has been used to measure distances to 500 nearby galaxies with the Hubble Space Telescope (HST) which are available in the Color-Magnitude Diagrams and Tip of the Red Giant Branch (CMDs/TRGB) catalog on the Extragalactic Distance Database (EDD). Our established methods are employed to perform an independent reductio…
z 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover
Bouwens, R. J.; Oesch, P.; Illingworth, G. +2 more
We present new determinations of the rest-UV luminosity functions (LFs) at z = 2-9 to extremely low luminosities (>-14 mag) from a sample of >2500 lensed galaxies found behind the Hubble Frontier Fields (HFF) clusters. For the first time, we present faint-end slope results from lensed samples that are fully consistent with blank-field result…
A Search for H-Dropout Lyman Break Galaxies at z 12-16
Koekemoer, Anton M.; Yung, L. Y. Aaron; Harikane, Yuichi +11 more
We present two bright galaxy candidates at z ~ 12-13 identified in our H-dropout Lyman break selection with 2.3 deg2 near-infrared deep imaging data. These galaxy candidates, selected after careful screening of foreground interlopers, have spectral energy distributions showing a sharp discontinuity around 1.7 µm, a flat continuum …
S 5: The Orbital and Chemical Properties of One Dozen Stellar Streams
Lewis, Geraint F.; Erkal, Denis; Bland-Hawthorn, Joss +18 more
We report the kinematic, orbital, and chemical properties of 12 stellar streams with no evident progenitors using line-of-sight velocities and metallicities from the Southern Stellar Stream Spectroscopic Survey (S 5), proper motions from Gaia EDR3, and distances derived from distance tracers or the literature. This data set provides the…
The Peculiar Short-duration GRB 200826A and Its Supernova
Covino, S.; D'Avanzo, P.; Della Valle, M. +31 more
Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are linked to the merger of compact objects. GRB 200826A was a peculiar event, because by definition it was an SGRB, with a rest-frame duration of ~0.5 s. However, this event was en…
Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
Kroupa, Pavel; Haslbauer, Moritz; Haghi, Hosein +1 more
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of M * ≳ 109 M ⊙ at photometric redshifts z phot ≳ 10, which allows to constrain galaxy and structure formation models. For example, Adams et al. identified the candidate ID 1514 with ${\…
CORINOS. I. JWST/MIRI Spectroscopy and Imaging of a Class 0 Protostar IRAS 15398–3359
Lee, Jeong-Eun; Cleeves, L. Ilsedore; Bergner, Jennifer B. +13 more
The origin of complex organic molecules (COMs) in young Class 0 protostars has been one of the major questions in astrochemistry and star formation. While COMs are thought to form on icy dust grains via gas-grain chemistry, observational constraints on their formation pathways have been limited to gas-phase detection. Sensitive mid-infrared spectr…
The Type Icn SN 2021csp: Implications for the Origins of the Fastest Supernovae and the Fates of Wolf-Rayet Stars
Kulkarni, S. R.; Filippenko, Alexei V.; Duev, Dmitry A. +32 more
We present observations of SN 2021csp, the second example of a newly identified type of supernova (SN) hallmarked by strong, narrow, P Cygni carbon features at early times (Type Icn). The SN appears as a fast and luminous blue transient at early times, reaching a peak absolute magnitude of -20 within 3 days due to strong interaction between fast S…