Search Publications
Titan global climate model: A new 3-dimensional version of the IPSL Titan GCM
Charnay, Benjamin; Lebonnois, Sébastien; Rannou, Pascal +1 more
We have developed a new 3-dimensional climate model for Titan’s atmosphere, using the physics of the IPSL Titan 2-dimensional climate model with the current version of the LMDZ General Circulation Model dynamical core. Microphysics and photochemistry are still computed as zonal averages. This GCM covers altitudes from surface to 500 km altitude, w…
Dust Spectral Energy Distributions in the Era of Herschel and Planck: A Hierarchical Bayesian-fitting Technique
Kauffmann, Jens; Launhardt, Ralf; Goodman, Alyssa A. +3 more
We present a hierarchical Bayesian method for fitting infrared spectral energy distributions (SEDs) of dust emission to observed fluxes. Under the standard assumption of optically thin single temperature (T) sources, the dust SED as represented by a power-law-modified blackbody is subject to a strong degeneracy between T and the spectral index β. …
Search for Gravitational Waves Associated with Gamma-Ray Bursts during LIGO Science Run 6 and Virgo Science Runs 2 and 3
Liu, Y.; Lee, H. M.; Foley, S. +807 more
We present the results of a search for gravitational waves associated with 154 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments in 2009-2010, during the sixth LIGO science run and the second and third Virgo science runs. We perform two distinct searches: a modeled search for coalescences of either two neutron sta…
CLASH: Mass Distribution in and around MACS J1206.2-0847 from a Full Cluster Lensing Analysis
Donahue, Megan; Broadhurst, Tom; Koch, Patrick M. +45 more
We derive an accurate mass distribution of the galaxy cluster MACS J1206.2-0847 (z = 0.439) from a combined weak-lensing distortion, magnification, and strong-lensing analysis of wide-field Subaru BVR c I c z' imaging and our recent 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova…
The Lick AGN Monitoring Project: Recalibrating Single-epoch Virial Black Hole Mass Estimates
Treu, Tommaso; Filippenko, Alexei V.; Barth, Aaron J. +9 more
We investigate the calibration and uncertainties of black hole (BH) mass estimates based on the single-epoch (SE) method, using homogeneous and high-quality multi-epoch spectra obtained by the Lick Active Galactic Nucleus (AGN) Monitoring Project for nine local Seyfert 1 galaxies with BH masses <108 M ⊙. By decomposing the…
The circumstellar disk of AB Aurigae: evidence for envelope accretion at late stages of star formation?
Guilloteau, S.; Dutrey, A.; Piétu, V. +3 more
Aims: The circumstellar disk of AB Aurigae has garnered strong attention owing to the apparent existence of spirals at a relatively young stage and also the asymmetric disk traced in thermal dust emission. However, the physical conditions of the spirals are still not well understood. The origin of the asymmetric thermal emission is unclear. <…
Shocking Tails in the Major Merger Abell 2744
Nulsen, Paul E. J.; Couch, Warrick J.; Owers, Matt S. +1 more
We identify four rare "jellyfish" galaxies in Hubble Space Telescope imagery of the major merger cluster Abell 2744. These galaxies harbor trails of star-forming knots and filaments which have formed in situ in gas tails stripped from the parent galaxies, indicating they are in the process of being transformed by the environment. Further evidence …
Spatially Resolved Hα Maps and Sizes of 57 Strongly Star-forming Galaxies at z ~ 1 from 3D-HST: Evidence for Rapid Inside-out Assembly of Disk Galaxies
Schmidt, Kasper B.; van Dokkum, Pieter G.; Franx, Marijn +13 more
We investigate the buildup of galaxies at z ~ 1 using maps of Hα and stellar continuum emission for a sample of 57 galaxies with rest-frame Hα equivalent widths >100 Å in the 3D-HST grism survey. We find that the Hα emission broadly follows the rest-frame R-band light but that it is typically somewhat more extended and clumpy. We quantify the s…
Herschel-ATLAS/GAMA: dusty early-type galaxies and passive spirals
Rodighiero, G.; Ivison, R. J.; de Zotti, G. +38 more
We present the dust properties and star formation histories of local submillimetre-selected galaxies, classified by optical morphology. Most of the galaxies are late types and very few are early types. The early-type galaxies (ETGs) that are detected contain as much dust as typical spirals, and form a unique sample that has been blindly selected a…
Precise Identifications of Submillimeter Galaxies: Measuring the History of Massive Star-forming Galaxies to z > 5
Wang, W. -H.; Owen, F. N.; Williams, J. P. +3 more
We carried out extremely sensitive Submillimeter Array (SMA) 340 GHz (860 µm) continuum imaging of a complete sample of SCUBA 850 µm sources (>4σ) with fluxes >3 mJy in the GOODS-N. Using these data and new SCUBA-2 data, we do not detect 4 of the 16 SCUBA sources, and we rule out the original SCUBA fluxes at the 4σ level. Three m…