Search Publications
Through the Looking GLASS: HST Spectroscopy of Faint Galaxies Lensed by the Frontier Fields Cluster MACSJ0717.5+3745
Malkan, M. A.; Poggianti, B.; Vulcani, B. +18 more
The Grism Lens-Amplified Survey from Space (GLASS) is a Hubble Space Telescope (HST) Large Program, which will obtain 140 orbits of grism spectroscopy of the core and infall regions of 10 galaxy clusters, selected to be among the very best cosmic telescopes. Extensive HST imaging is available from many sources including the CLASH and Frontier Fiel…
H2O Abundances in the Atmospheres of Three Hot Jupiters
Deming, Drake; Madhusudhan, Nikku; Crouzet, Nicolas +2 more
The core accretion theory for giant planet formation predicts enrichment of elemental abundances in planetary envelopes caused by runaway accretion of planetesimals, which is consistent with measured super-solar abundances of C, N, P, S, Xe, and Ar in Jupiter's atmosphere. However, the abundance of O, which is expected to be the most dominant cons…
Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. II. Gas-to-dust Ratio Variations across Interstellar Medium Phases
Gordon, Karl D.; Bot, Caroline; Lebouteiller, Vianney +32 more
The spatial variations of the gas-to-dust ratio (GDR) provide constraints on the chemical evolution and lifecycle of dust in galaxies. We examine the relation between dust and gas at 10-50 pc resolution in the Large and Small Magellanic Clouds (LMC and SMC) based on Herschel far-infrared (FIR), H I 21 cm, CO, and Hα observations. In the diffuse at…
A Geometrically Supported z ~ 10 Candidate Multiply Imaged by the Hubble Frontier Fields Cluster A2744
Broadhurst, Tom; Kelson, Daniel D.; Moustakas, John +11 more
The deflection angles of lensed sources increase with their distance behind a given lens. We utilize this geometric effect to corroborate the z phot ~= 9.8 photometric redshift estimate of a faint near-IR dropout, triply imaged by the massive galaxy cluster A2744 in deep Hubble Frontier Fields images. The multiple images of this source …
Fueling Active Galactic Nuclei. II. Spatially Resolved Molecular Inflows and Outflows
Malkan, M. A.; Burtscher, L.; Schnorr-Müller, A. +11 more
We analyze the two-dimensional distribution and kinematics of the stars as well as molecular and ionized gas in the central few hundred parsecs of five active and five matched inactive galaxies. The equivalent widths of the Brγ line indicate that there is no ongoing star formation in their nuclei, although recent (terminated) starbursts are possib…
The Dependence of Galactic Outflows on the Properties and Orientation of zCOSMOS Galaxies at z ~ 1
Kneib, J. -P.; Cimatti, A.; Bolzonella, M. +44 more
We present an analysis of cool outflowing gas around galaxies, traced by Mg II absorption lines in the coadded spectra of a sample of 486 zCOSMOS galaxies at 1 <= z <= 1.5. These galaxies span a range of stellar masses (9.45 <= log10[M */M ⊙] <= 10.7) and star formation rates (0.14 <= log10
Spectral Energy Distributions of QSOs at z > 5: Common Active Galactic Nucleus-heated Dust and Occasionally Strong Star-formation
Meisenheimer, K.; Walter, F.; Krause, O. +7 more
We present spectral energy distributions (SEDs) of 69 QSOs at z > 5, covering a rest frame wavelength range of 0.1 µm to ~80 µm, and centered on new Spitzer and Herschel observations. The detection rate of the QSOs with Spitzer is very high (97% at λrest <~ 4 µm), but drops toward the Herschel bands with 30% dete…
NGC 1277: A Massive Compact Relic Galaxy in the Nearby Universe
Vazdekis, Alexandre; Trujillo, Ignacio; Balcells, Marc +2 more
As early as 10 Gyr ago, galaxies with more than 1011 M ⊙ of stars already existed. While most of these massive galaxies must have subsequently transformed through on-going star formation and mergers with other galaxies, a small fraction (lsim0.1%) may have survived untouched until today. Searches for such relic galaxies, usef…
The Luminosity Function at z ~ 8 from 97 Y-band Dropouts: Inferences about Reionization
Holwerda, Benne W.; Stiavelli, Massimo; Schmidt, Kasper B. +6 more
We present the largest search to date for Y-band dropout galaxies (z ~ 8 Lyman break galaxies, LBGs) based on 350 arcmin2 of Hubble Space Telescope observations in the V, Y, J, and H bands from the Brightest of Reionizing Galaxies (BoRG) survey. In addition to previously published data, the BoRG13 data set presented here includes approx…
The 2-79 keV X-Ray Spectrum of the Circinus Galaxy with NuSTAR, XMM-Newton, and Chandra: A Fully Compton-thick Active Galactic Nucleus
Harrison, F. A.; Stern, D.; Zhang, W. W. +24 more
The Circinus galaxy is one of the closest obscured active galactic nuclei (AGNs), making it an ideal target for detailed study. Combining archival Chandra and XMM-Newton data with new NuSTAR observations, we model the 2-79 keV spectrum to constrain the primary AGN continuum and to derive physical parameters for the obscuring material. Chandra's hi…