199 citations · 3.7k across the 72 of their papers we have counts for
11 papers · 1 filter
Far-Ultraviolet Spectra of Main-Sequence O Stars at Extremely Low Metallicity
O. Grace Telford, John Chisholm, Kristen B. W. McQuinn +1
Metal-poor massive stars dominate the light we observe from star-forming dwarf galaxies and may have produced the bulk of energetic photons that reionized the universe at high reds…
Characterizing Extreme Emission Line Galaxies II: A Self-Consistent Model of Their Ionizing Spectrum
Grace M. Olivier, Danielle A. Berg, John Chisholm +3
Observations of high-redshift galaxies ( 5) have shown that these galaxies have extreme emission lines with equivalent widths much larger than their local star-forming counter…
Radial profiles of lensed galaxies on sub-kiloparsec scales
David Nagy, Miroslava Dessauges-Zavadsky, Johan Richard +4
We study the spatially resolved physical properties of the Cosmic Snake arc in MACS J1206.2-0847 and the arc in Abell 0521 (A521). These are two strongly lensed galaxies at redshif…
A 30 kpc Spatially Extended Clumpy and Asymmetric Galactic Outflow at z 1.7
Ahmed Shaban, Rongmon Bordoloi, John Chisholm +10
We image the spatial extent of a cool galactic outflow with fine structure Fe II emission and resonant Mg II emission in a gravitationally lensed star-forming galaxy at $z = 1.…
The DUVET Survey: Direct -based metallicity mapping of metal-enriched outflows and metal-poor inflows in Mrk 1486
Alex J. Cameron, Deanne B. Fisher, Daniel McPherson +10
We present electron temperature () maps for the edge-on system Mrk 1486, affording "direct-method" gas-phase metallicity measurements across (4.1 kpc)…
Detection of Lyman Continuum from 3.0 < z < 3.5 Galaxies in the HETDEX Survey
Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper +15
Questions as to what drove the bulk reionization of the Universe, how that reionization proceeded, and how the hard ionizing radiation reached the intergalactic medium remain open…
Characterizing Extreme Emission Line Galaxies I: A Four-Zone Ionization Model for Very-High-Ionization Emission
Danielle A. Berg, John Chisholm, Dawn K. Erb +3
Stellar population models produce radiation fields that ionize oxygen up to O+2, defining the limit of standard HII region models (<54.9 eV). Yet, some extreme emission line galaxi…
Probing Cosmic Dawn : Ages and Star Formation Histories of Candidate 9 Galaxies
N. Laporte, R. A. Meyer, R. S. Ellis +3
We discuss the spectral energy distributions and physical properties of six galaxies whose photometric redshifts suggest they lie beyond a redshift 9. Each was selected on…
The Low-redshift Lyman-continuum Survey: [S II]-deficiency and the leakage of ionizing radiation
Bingjie Wang, Timothy M. Heckman, Ricardo Amorín +19
The relationship between galaxy characteristics and the reionization of the universe remains elusive, mainly due to the observational difficulty in accessing the Lyman continuum (L…
Lyman continuum leakage from low-mass galaxies with Mstar < 1.E8 Msun
Y. I. Izotov, G. Worseck, D. Schaerer +5
We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine low-mass star-forming galaxies at redshifts, z, in the range 0.3179-0.4524,…
The Geometry of Cold, Metal-Enriched Gas Around Galaxies at
Britt F. Lundgren, Samantha Creech, Gabriel Brammer +10
We present the first results from a Hubble Space Telescope WFC3/IR program, which obtained direct imaging and grism observations of galaxies near quasar sightlines with a high freq…