Search Publications
A Chemical Composition Survey of the Iron-complex Globular Cluster NGC 6273 (M19)
Clarkson, William I.; Caldwell, Nelson; Rich, R. Michael +5 more
Recent observations have shown that a growing number of the most massive Galactic globular clusters contain multiple populations of stars with different [Fe/H] and neutron-capture element abundances. NGC 6273 has only recently been recognized as a member of this “iron-complex” cluster class, and we provide here a chemical and kinematic analysis of…
Physical Properties of Sub-galactic Clumps at 0.5 ≤ Z ≤ 1.5 in the UVUDF
Grogin, Norman A.; Koekemoer, Anton M.; Ravindranath, Swara +8 more
We present an investigation of clumpy galaxies in the Hubble Ultra Deep Field at 0.5≤slant z≤slant 1.5 in the rest-frame far-ultraviolet (FUV) using Hubble Space Telescope Wide Field Camera 3 broadband imaging in F225W, F275W, and F336W. An analysis of 1404 galaxies yields 209 galaxies that host 403 kpc scale clumps. These host galaxies appear to …
Haro 11: Where is the Lyman Continuum Source?
Jaskot, Anne E.; James, Bethan L.; Oey, M. S. +1 more
Identifying the mechanism by which high-energy Lyman continuum (LyC) photons escaped from early galaxies is one of the most pressing questions in cosmic evolution. Haro 11 is the best known local LyC-leaking galaxy, providing an important opportunity to test our understanding of LyC escape. The observed LyC emission in this galaxy presumably origi…
Ionized Gas Outflows in Infrared-bright Dust-obscured Galaxies Selected with WISE and SDSS
Toba, Yoshiki; Nagao, Tohru; Wang, Wei-Hao +5 more
We present the ionized gas properties of infrared (IR)-bright dust-obscured galaxies (DOGs) that show an extreme optical/IR color, {(i-[22])}{AB}> 7.0, selected with the Sloan Digital Sky Survey (SDSS) and Wide-field Infrared Survey Explorer (WISE). For 36 IR-bright DOGs that show [O III]λ5007 emission in the SDSS spectra, we perform…
First Results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS): Kinematics of Lensed Galaxies at Cosmic Noon
Fontana, Adriano; Schmidt, Kasper B.; Treu, Tommaso +12 more
We present the first results of the K-band Multi-Object Spectrometer (KMOS) Lens-Amplified Spectroscopic Survey, a new ESO Very Large Telescope large program, doing multi-object integral field spectroscopy of galaxies gravitationally lensed behind seven galaxy clusters selected from the Hubble Space Telescope (HST) Grism Lens-Amplified Survey from…
Spatially Resolved Kinematics in the Central 1 kpc of a Compact Star-forming Galaxy at z ∼2.3 from ALMA CO Observations
Rujopakarn, W.; Faber, S. M.; Dekel, A. +9 more
We present high spatial resolution (FWHM ∼ 0.″14) observations of the CO(8-7) line in GDS-14876, a compact star-forming galaxy at z = 2.3 with a total stellar mass of log(M ⋆/M ⊙) = 10.9. The spatially resolved velocity map of the inner r ≲ 1 kpc reveals a continuous velocity gradient consistent with the kinematics of a rotat…
FIGS—Faint Infrared Grism Survey: Description and Data Reduction
Finkelstein, Steven L.; Hathi, Nimish P.; Koekemoer, Anton M. +26 more
The Faint Infrared Grism Survey (FIGS) is a deep Hubble Space Telescope (HST) WFC3/IR (Wide Field Camera 3 Infrared) slitless spectroscopic survey of four deep fields. Two fields are located in the Great Observatories Origins Deep Survey-North (GOODS-N) area and two fields are located in the Great Observatories Origins Deep Survey-South (GOODS-S) …
ALMA Observations of Starless Core Substructure in Ophiuchus
Di Francesco, J.; Sadavoy, S. I.; Johnstone, D. +11 more
Compact substructure is expected to arise in a starless core as mass becomes concentrated in the central region likely to form a protostar. Additionally, multiple peaks may form if fragmentation occurs. We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 2 observations of 60 starless and protostellar cores in the Ophiuchus molecul…
Space Motions of the Dwarf Spheroidal Galaxies Draco and Sculptor Based on HST Proper Motions with a ∼10 yr Time Baseline
van der Marel, Roeland P.; van de Ven, Glenn; Bellini, Andrea +6 more
We present new proper motion (PM) measurements of the dwarf spheroidal galaxies (dSphs) Draco and Sculptor using multiepoch images obtained with the Hubble Space Telescope ACS/WFC. Our PM results have uncertainties far lower than previous measurements, even those made with the same instrument. The PM results for Draco and Sculptor are ({µ }<…
Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D
van Loon, J. Th.; Larsson, J.; Lundqvist, P. +21 more
Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outward through the progenitor star. Observations of the composition and structure of the innermost regio…