Search Publications
An Expanded HST/WFC3 Survey of M83: Project Overview and Targeted Supernova Remnant Search
Soria, Roberto; Blair, William P.; Whitmore, Bradley C. +7 more
We present an optical/NIR imaging survey of the face-on spiral galaxy M83, using data from the Hubble Space Telescope Wide Field Camera 3 (WFC3). Seven fields are used to cover a large fraction of the inner disk, with observations in nine broadband and narrowband filters. In conjunction with a deep Chandra survey and other new radio and optical gr…
What is the Physical Origin of Strong Lyα Emission? I. Demographics of Lyα Emitter Structures
Ouchi, Masami; Shibuya, Takatoshi; Shimasaku, Kazuhiro +5 more
We present the results of structure analyses for a large sample of 426 Lyα emitters (LAEs) at z ~ 2.2 that are observed with the Hubble Space Telescope/Advanced Camera for Surveys and WFC3-IR during deep extra-galactic legacy surveys. We confirm that the merger fraction and the average ellipticity of LAE's stellar component are 10%-30% and 0.4-0.6…
Evolution of the Fraction of Clumpy Galaxies at 0.2 < z < 1.0 in the COSMOS Field
Ilbert, O.; Taniguchi, Y.; Salvato, M. +7 more
Using the Hubble Space Telescope/Advanced Camera for Surveys data in the COSMOS field, we systematically searched clumpy galaxies at 0.2 < z < 1.0 and investigated the fraction of clumpy galaxies and its evolution as a function of stellar mass, star formation rate (SFR), and specific SFR (SSFR). The fraction of clumpy galaxies in star-formin…
Constraints for the Progenitor Masses of 17 Historic Core-collapse Supernovae
Dolphin, Andrew E.; Williams, Benjamin F.; Dalcanton, Julianne J. +4 more
Using resolved stellar photometry measured from archival Hubble Space Telescope imaging, we generate color-magnitude diagrams of the stars within 50 pc of the locations of historic core-collapse supernovae (SNe) that took place in galaxies within 8 Mpc. We fit these color-magnitude distributions with stellar evolution models to determine the best-…
Spatially Resolving a Starburst Galaxy at Hard X-Ray Energies: NuSTAR, Chandra, and VLBA Observations of NGC 253
Argo, M. K.; Krivonos, R.; Wik, D. R. +16 more
Prior to the launch of NuSTAR, it was not feasible to spatially resolve the hard (E > 10 keV) emission from galaxies beyond the Local Group. The combined NuSTAR data set, comprised of three ~165 ks observations, allows spatial characterization of the hard X-ray emission in the galaxy NGC 253 for the first time. As a follow up to our initial stu…
The XXL Survey. V. Detection of the Sunyaev-Zel'dovich Effect of the Redshift 1.9 Galaxy Cluster XLSSU J021744.1-034536 with CARMA
Pierre, M.; Willis, J.; Adami, C. +14 more
We report the detection of the Sunyaev-Zel'dovich (SZ) effect of galaxy cluster XLSSU J021744.1-034536, using 30 GHz Combined Array for Research in Millimeter-wave Astronomy (CARMA) data. This cluster was discovered via its extended X-ray emission in the XMM- Newton Large Scale Structure survey, the precursor to the XXL survey. It has a photometri…
A Study of Massive and Evolved Galaxies at High Redshift
Dickinson, M.; Ferguson, H. C.; Giavalisco, M. +17 more
We use data taken as part of Hubble Space Telescope (HST)/Wide Field Camera 3 (WFC3) observations of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) to identify massive and evolved galaxies at 3 < z < 4.5. This is performed using the strength of the Balmer break feature at rest-frame 3648 Å, which is a diagnostic…
Spitzer Ultra Faint SUrvey Program (SURFS UP). I. An Overview
Casertano, Stefano; Treu, Tommaso; Bradač, Maruša +14 more
Spitzer UltRa Faint SUrvey Program is a joint Spitzer and Hubble Space Telescope Exploration Science program using 10 galaxy clusters as cosmic telescopes to study z >~ 7 galaxies at intrinsically lower luminosities, enabled by gravitational lensing, than blank field surveys of the same exposure time. Our main goal is to measure stellar masses …
Study of Two Successive Three-ribbon Solar Flares on 2012 July 6
Xu, Yan; Cao, Wenda; Liu, Chang +4 more
This Letter reports two rarely observed three-ribbon flares (M1.9 and C9.2) on 2012 July 6 in NOAA AR 11515, which we found using Hα observations of 0.''1 resolution from the New Solar Telescope and Ca II H images from Hinode. The flaring site is characterized by an intriguing "fish-bone-like" morphology evidenced by both Hα images and a nonlinear…
The Physical Parameters of the Retired a Star HD 185351
Barclay, Thomas; Huber, Daniel; Stello, Dennis +6 more
We report here an analysis of the physical stellar parameters of the giant star HD 185351 using Kepler short-cadence photometry, optical and near infrared interferometry from CHARA, and high-resolution spectroscopy. Asteroseismic oscillations detected in the Kepler short-cadence photometry combined with an effective temperature calculated from the…