Science Archives Publication System

r-process Lanthanide Production and Heating Rates in Kilonovae

DOI: 10.1088/0004-637X/815/2/82 Bibcode: 2015ApJ...815...82L

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…

2015 • The Astrophysical Journal

eHST 229

A Catalog of Visual-like Morphologies in the 5 CANDELS Fields Using Deep Learning

DOI: 10.1088/0067-0049/221/1/8 Bibcode: 2015ApJS..221....8H

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 (H_f160w < 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…

2015 • The Astrophysical Journal Supplement Series

eHST 229

Clumpy Galaxies in CANDELS. I. The Definition of UV Clumps and the Fraction of Clumpy Galaxies at 0.5 < z < 3

DOI: 10.1088/0004-637X/800/1/39 Bibcode: 2015ApJ...800...39G

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…

2015 • The Astrophysical Journal

eHST 223

Reheating predictions in single field inflation

DOI: 10.1088/1475-7516/2015/04/047 Bibcode: 2015JCAP...04..047C

Krauss, Lawrence M.; Easson, Damien A.; Cook, Jessica L. +1 more

Reheating is a transition era after the end of inflation, during which the inflaton is converted into the particles that populate the Universe at later times. No direct cosmological observables are normally traceable to this period of reheating. Indirect bounds can however be derived. One possibility is to consider cosmological evolution for obser…

2015 • Journal of Cosmology and Astroparticle Physics

Planck 222

Organic compounds on comet 67P/Churyumov-Gerasimenko revealed by COSAC mass spectrometry

DOI: 10.1126/science.aab0689 Bibcode: 2015Sci...349b0689G

Krüger, Harald; McKenna-Lawlor, Susan; Gautier, Thomas +18 more

Comets harbor the most pristine material in our solar system in the form of ice, dust, silicates, and refractory organic material with some interstellar heritage. The evolved gas analyzer Cometary Sampling and Composition (COSAC) experiment aboard Rosetta’s Philae lander was designed for in situ analysis of organic molecules on comet 67P/Churyumov…

2015 • Science

Rosetta 222

Weather on Other Worlds. II. Survey Results: Spots are Ubiquitous on L and T Dwarfs

DOI: 10.1088/0004-637X/799/2/154 Bibcode: 2015ApJ...799..154M

Goldman, Bertrand; Apai, Dániel; Marley, Mark S. +7 more

We present results from the Weather on Other Worlds Spitzer Exploration Science program to investigate photometric variability in L and T dwarfs, usually attributed to patchy clouds. We surveyed 44 L3-T8 dwarfs, spanning a range of J - K_s colors and surface gravities. We find that 14/23 (61%_-20%^+17%, 95% confidence…

2015 • The Astrophysical Journal

eHST 222

Black hole feedback in the luminous quasar PDS 456

DOI: 10.1126/science.1259202 Bibcode: 2015Sci...347..860N

Harrison, F. A.; Stern, D.; Behar, E. +17 more

The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spheri…

2015 • Science

XMM-Newton 222

Scaling properties of a complete X-ray selected galaxy group sample

DOI: 10.1051/0004-6361/201423954 Bibcode: 2015A&A...573A.118L

Lovisari, L.; Reiprich, T. H.; Schellenberger, G.

Context. Upcoming X-ray surveys like eROSITA require precise calibration between X-ray observables and mass down to the low-mass regime to set tight constraints on the fundamental cosmological parameters. Since an individual mass measurement is only possible for relatively few objects, it is crucial to have reliable and clearly understood scaling …

2015 • Astronomy and Astrophysics

XMM-Newton 220

A Turnover in the Galaxy Main Sequence of Star Formation at M _* ~ 10¹⁰ M _⊙ for Redshifts z < 1.3

DOI: 10.1088/0004-637X/801/2/80 Bibcode: 2015ApJ...801...80L

Casey, Caitlin M.; Kartaltepe, Jeyhan S.; Kewley, Lisa J. +14 more

The relationship between galaxy star formation rates (SFRs) and stellar masses (M _*) is reexamined using a mass-selected sample of ~62,000 star-forming galaxies at z <= 1.3 in the COSMOS 2 deg² field. Using new far-infrared photometry from Herschel-PACS and SPIRE and Spitzer-MIPS 24 µm, along with derived infrared lu…

2015 • The Astrophysical Journal

Herschel 215

LoCuSS: The Slow Quenching of Star Formation in Cluster Galaxies and the Need for Pre-processing

DOI: 10.1088/0004-637X/806/1/101 Bibcode: 2015ApJ...806..101H

Finoguenov, A.; Smith, G. P.; Okabe, N. +8 more

We present a study of the spatial distribution and kinematics of star-forming galaxies in 30 massive clusters at 0.15 < z < 0.30, combining wide-field Spitzer 24 µm and GALEX near-ultraviolet imaging with highly complete spectroscopy of cluster members. The fraction (f_SF) of star-forming cluster galaxies rises steadily with …

2015 • The Astrophysical Journal

XMM-Newton 214