Search Publications
Connection between Stellar Mass Distributions within Galaxies and Quenching Since z = 2
Tacchella, Sandro; Renzini, Alvio; Onodera, Masato +5 more
We study the history from z∼ 2 to z∼ 0 of the stellar mass assembly of quiescent and star-forming galaxies in a spatially resolved fashion. For this purpose, we use multi-wavelength imaging data from the Hubble Space Telescope (HST) over the GOODS fields and the Sloan Digital Sky Survey (SDSS) for the local population. We present the radial stella…
Gemini Near Infrared Field Spectrograph Observations of the Seyfert 2 Galaxy Mrk 573: In Situ Acceleration of Ionized and Molecular Gas off Fueling Flows
Kraemer, S. B.; Crenshaw, D. M.; Storchi-Bergmann, T. +9 more
We present near-infrared and optical emission-line and stellar kinematics of the Seyfert 2 galaxy Mrk 573 using the Near-Infrared Field Spectrograph (NIFS) at Gemini North and Dual Imaging Spectrograph at Apache Point Observatory, respectively. By obtaining full kinematic maps of the infrared ionized and molecular gas and stellar kinematics in a ∼…
Survey of Cold Water Lines in Protoplanetary Disks: Indications of Systematic Volatile Depletion
van Dishoeck, Ewine F.; Fedele, Davide; Lis, Dariusz C. +11 more
We performed very deep searches for 2 ground-state water transitions in 13 protoplanetary disks with the HIFI instrument on board the Herschel Space Observatory, with integration times up to 12 hr per line. We also searched for, with shallower integrations, two other water transitions that sample warmer gas. The detection rate is low, and the uppe…
Spectral Changes in the Hyperluminous Pulsar in NGC 5907 as a Function of Super-orbital Phase
Harrison, F. A.; Stern, D.; Bachetti, M. +5 more
We present broadband, multi-epoch X-ray spectroscopy of the pulsating ultra-luminous X-ray source (ULX) in NGC 5907. Simultaneous XMM-Newton and NuSTAR data from 2014 are best described by a multicolor blackbody model with a temperature gradient as a function of accretion disk radius significantly flatter than expected for a standard thin accretio…
The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era
Grebel, Eva K.; Hogg, David W.; Steinmetz, Matthias +24 more
The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy formation available. The Tycho-Gaia Astrometric Solution (TGAS) will deliver astrometric parameters for the largest ever sample of Milky Way stars, though its full potential cannot be realized…
Far-ultraviolet to Near-infrared Spectroscopy of a Nearby Hydrogen-poor Superluminous Supernova Gaia16apd
Cenko, S. B.; Gal-Yam, A.; Kasliwal, M. +8 more
We report the first maximum-light far-ultraviolet (FUV) to near-infrared (NIR) spectra (1000 Å - 1.62 µm, rest) of a hydrogen-poor superluminous supernova, Gaia16apd. At z = 0.1018, it is the second closest and the UV brightest SLSN-I, with 17.4 mag in Swift UVW2 band at -11 days pre-maximum. The coordinated observations with HST, Palomar, a…
General Physical Properties of CGRaBS Blazars
Ajello, M.; Rao, A. R.; Hartmann, D. +4 more
We present the results of a multi-frequency, time-averaged analysis of blazars included in the Candidate Gamma-ray Blazar Survey catalog. Our sample consists of 324 γ-ray detected (γ-ray loud) and 191 γ-ray undetected (γ-ray quiet) blazars; we consider all the data up to 2016 April 1. We find that both the γ-ray loud and γ-ray quiet blazar populat…
The Hierarchical Distribution of the Young Stellar Clusters in Six Local Star-forming Galaxies
Dale, D. A.; Calzetti, D.; Kennicutt, R. C. +16 more
We present a study of the hierarchical clustering of the young stellar clusters in six local (3-15 Mpc) star-forming galaxies using Hubble Space Telescope broadband WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy ExtraGalactic UV Survey). We identified 3685 likely clusters and associations, each visually classified by their…
Dust-deficient Palomar-Green Quasars and the Diversity of AGN Intrinsic IR Emission
Lyu, Jianwei; Rieke, G. H.; Shi, Yong
To elucidate the intrinsic broadband infrared (IR) emission properties of active galactic nuclei (AGNs), we analyze the spectral energy distributions (SEDs) of 87 z ≲ 0.5 Palomar-Green (PG) quasars. While the Elvis AGN template with a moderate far-IR correction can reasonably match the SEDs of the AGN components in ∼60% of the sample (and is super…
The Size Evolution of Star-forming Galaxies since z ∼ 7 Using ZFOURGE
Papovich, Casey; Allen, Rebecca J.; Kacprzak, Glenn G. +10 more
For the first time, we present the size evolution of a mass-complete (log(M*/M⊙) > 10) sample of star-forming galaxies over redshifts z = 1-7, selected from the FourStar Galaxy Evolution Survey. Observed H-band sizes are measured from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) Hubble Space…