Search Publications
The 1% Concordance Hubble Constant
Larson, D.; Weiland, J. L.; Hinshaw, G. +1 more
The determination of the Hubble constant has been a central goal in observational astrophysics for nearly a hundred years. Extraordinary progress has occurred in recent years on two fronts: the cosmic distance ladder measurements at low redshift and cosmic microwave background (CMB) measurements at high redshift. The CMB is used to predict the cur…
Andromeda's Dust
Schinnerer, Eva; Rix, Hans-Walter; Draine, B. T. +10 more
Spitzer Space Telescope and Herschel Space Observatory imaging of M31 is used, with a physical dust model, to construct maps of dust surface density, dust-to-gas ratio, starlight heating intensity, and polycyclic aromatic hydrocarbon (PAH) abundance, out to R ≈ 25 kpc. The global dust mass is M d = 5.4 × 107 M ⊙, t…
A Two-parameter Model for the Infrared/Submillimeter/Radio Spectral Energy Distributions of Galaxies and Active Galactic Nuclei
Magdis, Georgios E.; Dale, Daniel A.; Díaz-Santos, Tanio +3 more
A two-parameter semi-empirical model is presented for the spectral energy distributions of galaxies with contributions to their infrared-submillimeter-radio emission from both star formation and accretion disk-powered activity. This model builds upon a previous one-parameter family of models for star-forming galaxies, and includes an update to the…
Precision Measures of the Primordial Abundance of Deuterium
Pettini, Max; Steidel, Charles C.; Jorgenson, Regina A. +2 more
We report the discovery of deuterium absorption in the very metal-poor ([Fe/H] = -2.88) damped Lyα system at z abs = 3.06726 toward the QSO SDSS J1358+6522. On the basis of 13 resolved D I absorption lines and the damping wings of the H I Lyα transition, we have obtained a new, precise measure of the primordial abundance of deuterium. F…
Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey
Price, P. A.; Berger, E.; Challis, P. +46 more
We present griz P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a combination of on-site measurements of the instrument response function and observati…
Evidence for Ubiquitous Collimated Galactic-scale Outflows along the Star-forming Sequence at z ~ 0.5
Martin, Crystal L.; Prochaska, J. Xavier; Koo, David C. +3 more
We analyze Mg II λλ2796, 2803 and Fe II λλ2586, 2600 absorption profiles in individual spectra of 105 galaxies at 0.3 < z < 1.4. The galaxies, drawn from redshift surveys of the GOODS fields and the Extended Groth Strip, sample the range in star formation rates (SFRs) occupied by the star-forming sequence with stellar masses log M *
A Precise Water Abundance Measurement for the Hot Jupiter WASP-43b
Madhusudhan, Nikku; Burrows, Adam; Fortney, Jonathan J. +13 more
The water abundance in a planetary atmosphere provides a key constraint on the planet's primordial origins because water ice is expected to play an important role in the core accretion model of planet formation. However, the water content of the solar system giant planets is not well known because water is sequestered in clouds deep in their atmos…
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…