Search Publications
GOODS-Herschel: Star Formation, Dust Attenuation, and the FIR-radio Correlation on the Main Sequence of Star-forming Galaxies up to z ≃4
Aussel, H.; Daddi, E.; Elbaz, D. +25 more
We use deep panchromatic data sets in the GOODS-N field, from GALEX to the deepest Herschel far-infrared (FIR) and VLA radio continuum imaging, to explore the evolution of star-formation activity and dust attenuation properties of star-forming galaxies to z ≃ 4, using mass-complete samples. Our main results can be summarized as follows: (i) the sl…
Blowin' in the Wind: Both "Negative" and "Positive" Feedback in an Obscured High-z Quasar
Maiolino, R.; Silverman, J. D.; Merloni, A. +13 more
Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench star formation in galaxies, preventing massive galaxies to overgrow and producing the red colors of ellipticals. On the other hand, some models are also requiring "positive" active galactic nucleus feedback, inducing star formation in the host galaxy through e…
[C II] 158 µm Emission as a Star Formation Tracer
Helou, G.; Boquien, M.; Roussel, H. +23 more
The [C II] 157.74 µm transition is the dominant coolant of the neutral interstellar gas, and has great potential as a star formation rate (SFR) tracer. Using the Herschel KINGFISH sample of 46 nearby galaxies, we investigate the relation of [C II] surface brightness and luminosity with SFR. We conclude that [C II] can be used for measurement…
Tau-REx I: A Next Generation Retrieval Code for Exoplanetary Atmospheres
Waldmann, I. P.; Rocchetto, M.; Tinetti, G. +3 more
Spectroscopy of exoplanetary atmospheres has become a well established method for the characterization of extrasolar planets. We here present a novel inverse retrieval code for exoplanetary atmospheres. T-REx(Tau Retrieval for Exoplanets) is a line-by-line radiative transfer fully Bayesian retrieval framework. T-REx includes the following features…
Are Ultra-faint Galaxies at z = 6-8 Responsible for Cosmic Reionization? Combined Constraints from the Hubble Frontier Fields Clusters and Parallels
Richard, Johan; Schaerer, Daniel; Kneib, Jean-Paul +8 more
We use deep Hubble Space Telescope imaging of the Frontier Fields to accurately measure the galaxy rest-frame ultraviolet luminosity function (UV LF) in the redshift range z ∼ 6-8. We combine observations in three lensing clusters, A2744, MACS 0416, and MACS 0717, and their associated parallel fields to select high-redshift dropout candidates. We …
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. III. A Quintuple Stellar Population in NGC 2808
Anderson, J.; Milone, A. P.; Marino, A. F. +9 more
In this study we present the first results from multi-wavelength Hubble Space Telescope (HST) observations of the Galactic globular cluster (GC) NGC 2808 as an extension of the Hubble Space Telescope UV Legacy Survey of Galactic GCs (GO-13297 and previous proprietary and HST archive data). Our analysis allowed us to disclose a multiple-stellar-pop…
The Light Curve of the Macronova Associated with the Long-Short Burst GRB 060614
Li, Xiang; Jin, Zhi-Ping; Covino, Stefano +3 more
The Swift-detected GRB 060614 was a unique burst that straddles an imaginary divide between long- and short-duration gamma-ray bursts (GRBs), and its physical origin has been heavily debated over the years. Recently, a distinct, very soft F814W-band excess at t∼ 13.6 days after the burst was identified in a joint-analysis of VLT and Hubble Space T…
Hubble Frontier Fields First Complete Cluster Data: Faint Galaxies at z ~ 5-10 for UV Luminosity Functions and Cosmic Reionization
Ono, Yoshiaki; Ouchi, Masami; Shimasaku, Kazuhiro +3 more
We present comprehensive analyses of faint dropout galaxies up to z ~ 10 with the first full-depth data set of the A2744 lensing cluster and parallel fields observed by the Hubble Frontier Fields (HFF) program. We identify 54 dropouts at z ~ 5-10 in the HFF fields and enlarge the size of the z ~ 9 galaxy sample obtained to date. Although the numbe…
Major Mergers Host the Most-luminous Red Quasars at z ~ 2: A Hubble Space Telescope WFC3/IR Study
Schawinski, Kevin; Urry, C. M.; Glikman, Eilat +3 more
We used the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) near-infrared camera to image the host galaxies of a sample of 11 luminous, dust-reddened quasars at z∼ 2—the peak epoch of black hole growth and star formation in the universe—to test the merger-driven picture for the coevolution of galaxies and their nuclear black holes. The red…
High-precision Photometric Redshifts from Spitzer/IRAC: Extreme [3.6] - [4.5] Colors Identify Galaxies in the Redshift Range z ∼ 6.6 - 6.9
Holwerda, Benne; Franx, Marijn; Labbé, Ivo +7 more
One of the most challenging aspects of studying galaxies in the z≳ 7 universe is the infrequent confirmation of their redshifts through spectroscopy, a phenomenon thought to occur from the increasing opacity of the intergalactic medium to Lyα photons at z\gt 6.5. The resulting redshift uncertainties inhibit the efficient search for [C ii] in z∼ 7 …