Search Publications
The Quenching of the Ultra-faint Dwarf Galaxies in the Reionization Era
Ferguson, Henry C.; Brown, Thomas M.; Gennaro, Mario +11 more
We present new constraints on the star formation histories of six ultra-faint dwarf galaxies: Bootes I, Canes Venatici II, Coma Berenices, Hercules, Leo IV, and Ursa Major I. Our analysis employs a combination of high-precision photometry obtained with the Advanced Camera for Surveys on the Hubble Space Telescope, medium-resolution spectroscopy ob…
A Budget and Accounting of Metals at z ~ 0: Results from the COS-Halos Survey
Prochaska, J. Xavier; Tumlinson, Jason; Weinberg, David H. +4 more
We present a budget and accounting of metals in and around star-forming galaxies at z ~ 0. We combine empirically derived star formation histories with updated supernova and asymptotic giant branch yields and rates to estimate the total mass of metals produced by galaxies with present-day stellar mass of 109.3-1011.6 M⊙<…
Regularity Underlying Complexity: A Redshift-independent Description of the Continuous Variation of Galaxy-scale Molecular Gas Properties in the Mass-star Formation Rate Plane
Aussel, H.; Daddi, E.; Elbaz, D. +6 more
Star-forming galaxies (SFGs) display a continuous specific star formation rate (sSFR) distribution, which can be approximated by two log-normal functions: one encompassing the galaxy main sequence (MS), and the other a rarer, starbursting population. Starburst (SB) sSFRs can be regarded as the outcome of a physical process (plausibly merging) taki…
An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: The Redshift Distribution and Evolution of Submillimeter Galaxies
Thomson, A. P.; Ivison, R. J.; Smail, Ian +21 more
We present the first photometric redshift distribution for a large sample of 870 µm submillimeter galaxies (SMGs) with robust identifications based on observations with ALMA. In our analysis we consider 96 SMGs in the Extended Chandra Deep Field South, 77 of which have 4-19 band photometry. We model the SEDs for these 77 SMGs, deriving a med…
The Most Luminous z ~ 9-10 Galaxy Candidates Yet Found: The Luminosity Function, Cosmic Star-formation Rate, and the First Mass Density Estimate at 500 Myr
Trenti, M.; Brammer, G. B.; Oesch, P. A. +15 more
We present the discovery of four surprisingly bright (H 160 ~ 26-27 mag AB) galaxy candidates at z ~ 9-10 in the complete HST CANDELS WFC3/IR GOODS-N imaging data, doubling the number of z ~ 10 galaxy candidates that are known, just ~500 Myr after the big bang. Two similarly bright sources are also detected in a reanalysis of the GOODS-…
Line-emitting Galaxies beyond a Redshift of 7: An Improved Method for Estimating the Evolving Neutrality of the Intergalactic Medium
Stark, Daniel P.; Ellis, Richard S.; Konidaris, Nick P. +1 more
The redshift-dependent fraction of color-selected galaxies revealing Lyman alpha (Lyα) emission, x Lyα has become the most valuable constraint on the evolving neutrality of the early intergalactic medium. However, in addition to resonant scattering by neutral gas, the visibility of Lyα is also dependent on the intrinsic properties of th…
Bulge Growth and Quenching since z = 2.5 in CANDELS/3D-HST
Bell, Eric F.; Ferguson, Henry C.; Grogin, Norman A. +20 more
Exploiting the deep high-resolution imaging of all five CANDELS fields, and accurate redshift information provided by 3D-HST, we investigate the relation between structure and stellar populations for a mass-selected sample of 6764 galaxies above 1010 M ⊙, spanning the redshift range 0.5 < z < 2.5. For the first time, we…
The Spectrum and Morphology of the Fermi Bubbles
Troja, E.; Caraveo, P. A.; Orlando, E. +132 more
The Fermi bubbles are two large structures in the gamma-ray sky extending to 55° above and below the Galactic center. We analyze 50 months of Fermi Large Area Telescope data between 100 MeV and 500 GeV above 10° in Galactic latitude to derive the spectrum and morphology of the Fermi bubbles. We thoroughly explore the systematic uncertainties that …
Astrometric Exoplanet Detection with Gaia
Bakos, Gáspár Á.; Lindegren, Lennart; Hartman, Joel +1 more
We provide a revised assessment of the number of exoplanets that should be discovered by Gaia astrometry, extending previous studies to a broader range of spectral types, distances, and magnitudes. Our assessment is based on a large representative sample of host stars from the TRILEGAL Galaxy population synthesis model, recent estimates of the exo…
Evidence for Ubiquitous High-equivalent-width Nebular Emission in z ~ 7 Galaxies: Toward a Clean Measurement of the Specific Star-formation Rate Using a Sample of Bright, Magnified Galaxies
Kelson, D. D.; Infante, L.; Zheng, W. +30 more
Growing observational evidence indicates that nebular line emission has a significant impact on the rest-frame optical fluxes of z ~ 5-7 galaxies. This line emission makes z ~ 5-7 galaxies appear more massive, with lower specific star-formation rates (sSFRs). However, corrections for this line emission have been difficult to perform reliably becau…