Search Publications
Stellar Masses and Star Formation Rates for 1M Galaxies from SDSS+WISE
van der Wel, Arjen; Rix, Hans-Walter; da Cunha, Elisabete +1 more
We combine Sloan Digitital Sky Survey (SDSS) and WISE photometry for the full SDSS spectroscopic galaxy sample, creating spectral energy distributions (SEDs) that cover λ = 0.4-22 µm for an unprecedentedly large and comprehensive sample of 858,365 present-epoch galaxies. Using MAGPHYS, we then simultaneously and consistently model both the a…
The MOSDEF Survey: Mass, Metallicity, and Star-formation Rate at z ~ 2.3
Siana, Brian; Shapley, Alice E.; Reddy, Naveen A. +8 more
We present results on the z ~ 2.3 mass-metallicity relation (MZR) using early observations from the MOSFIRE Deep Evolution Field survey. We use an initial sample of 87 star-forming galaxies with spectroscopic coverage of Hβ, [O III] λ5007, Hα, and [N II] λ6584 rest-frame optical emission lines, and estimate the gas-phase oxygen abundance based on …
The FIP and Inverse FIP Effects in Solar and Stellar Coronae
Laming, J. Martin
We review our state of knowledge of coronal element abundance anomalies in the Sun and stars. We concentrate on the first ionization potential (FIP) effect observed in the solar corona and slow-speed wind, and in the coronae of solar-like dwarf stars, and the "inverse FIP" effect seen in the corona of stars of later spectral type; specifically M d…
Constraining the Milky Way's Hot Gas Halo with O VII and O VIII Emission Lines
Bregman, Joel N.; Miller, Matthew J.
The Milky Way hosts a hot (≈2 × 106 K), diffuse, gaseous halo based on detections of z = 0 O VII and O VIII absorption lines in quasar spectra and emission lines in blank-sky spectra. Here we improve constraints on the structure of the hot gas halo by fitting a radial model to a much larger sample of O VII and O VIII emission line measu…
CLASH: The Concentration-Mass Relation of Galaxy Clusters
Infante, L.; Zheng, W.; Molino, A. +38 more
We present a new determination of the concentration-mass (c-M) relation for galaxy clusters based on our comprehensive lensing analysis of 19 X-ray selected galaxy clusters from the Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans a redshift range between 0.19 and 0.89. We combine weak-lensing constraints from the Hubble …
The MOSDEF Survey: Excitation Properties of z ∼ 2.3 Star-forming Galaxies
Siana, Brian; Shapley, Alice E.; Reddy, Naveen A. +8 more
We present results on the excitation properties of z ∼ 2.3 galaxies using early observations from the MOSFIRE Deep Evolution Field (MOSDEF) Survey. With its coverage of the full suite of strong rest-frame optical emission lines, MOSDEF provides an unprecedented view of the rest-frame optical spectra of a representative sample of distant star-formi…
A Detection of Water in the Transmission Spectrum of the Hot Jupiter WASP-12b and Implications for Its Atmospheric Composition
Madhusudhan, Nikku; Fortney, Jonathan J.; Stevenson, Kevin B. +8 more
Detailed characterization of exoplanets has begun to yield measurements of their atmospheric properties that constrain the planets’ origins and evolution. For example, past observations of the dayside emission spectrum of the hot Jupiter WASP-12b indicated that its atmosphere has a high carbon-to-oxygen ratio (C/O > 1), suggesting it had a diff…
r-process Lanthanide Production and Heating Rates in Kilonovae
Lippuner, Jonas; Roberts, Luke F.
r-process nucleosynthesis in material ejected during neutron star mergers may lead to radioactively powered transients called kilonovae. The timescale and peak luminosity of these transients depend on the composition of the ejecta, which determines the local heating rate from nuclear decays and the opacity. Kasen et al. and Tanaka & Hotokezaka…
A Catalog of Visual-like Morphologies in the 5 CANDELS Fields Using Deep Learning
Kartaltepe, J. S.; Faber, S. M.; Huertas-Company, M. +12 more
We present a catalog of visual-like H-band morphologies of ∼50.000 galaxies (Hf160w < 24.5) in the 5 CANDELS fields (GOODS-N, GOODS-S, UDS, EGS, and COSMOS). Morphologies are estimated using Convolutional Neural Networks (ConvNets). The median redshift of the sample is < z> ∼ 1.25. The algorithm is trained on GOODS-S, for which…
Clumpy Galaxies in CANDELS. I. The Definition of UV Clumps and the Fraction of Clumpy Galaxies at 0.5 < z < 3
Barro, Guillermo; Bell, Eric F.; Ferguson, Henry C. +19 more
Although giant clumps of stars are thought to be crucial to galaxy formation and evolution, the most basic demographics of clumps are still uncertain, mainly because the definition of clumps has not been thoroughly discussed. In this paper, we carry out a study of the basic demographics of clumps in star-forming galaxies at 0.5 < z < 3, usin…