Search Publications
XMM-Newton Detects a Hot Gaseous Halo in the Fastest Rotating Spiral Galaxy UGC 12591
Bregman, Joel N.; Anderson, Michael E.; Miller, Jon M. +1 more
We present our XMM-Newton observation of the fastest rotating spiral galaxy UGC 12591. We detect hot gas halo emission out to 80 kpc from the galaxy center, and constrain the halo gas mass to be smaller than 4.5 × 1011 M ⊙. We also measure the temperature of the hot gas as T = 0.64 ± 0.03 keV. Combining our x-ray constraints …
The Star Formation in Radio Survey: GBT 33 GHz Observations of Nearby Galaxy Nuclei and Extranuclear Star-forming Regions
Helou, G.; Murphy, E. J.; Armus, L. +7 more
We present 33 GHz photometry of 103 galaxy nuclei and extranuclear star-forming complexes taken with the Green Bank Telescope as part of the Star Formation in Radio Survey. Among the sources without evidence for an active galactic nucleus, and also having lower frequency radio data, we find a median thermal fraction at 33 GHz of ≈76% with a disper…
The Evolution of Lyα-emitting Galaxies between z = 2.1 and z = 3.1
Gronwall, Caryl; Gawiser, Eric; Ciardullo, Robin +11 more
We describe the results of a new, wide-field survey for z = 3.1 Lyα emitters (LAEs) in the Extended Chandra Deep Field South (ECDF-S). By using a nearly top-hat 5010 Å filter and complementary broadband photometry from the MUSYC survey, we identify a complete sample of 141 objects with monochromatic fluxes brighter than 2.4 × 10-17 erg …
Coronal Magnetic Field Measurement from EUV Images Made by the Solar Dynamics Observatory
Gopalswamy, Nat; Akiyama, Sachiko; Yashiro, Seiji +2 more
By measuring the geometrical properties of the coronal mass ejection (CME) flux rope and the leading shock observed on 2010 June 13 by the Solar Dynamics Observatory (SDO) mission's Atmospheric Imaging Assembly we determine the Alfvén speed and the magnetic field strength in the inner corona at a heliocentric distance of ~1.4 Rs. The basic measure…
Major-merger Galaxy Pairs in the COSMOS Field—Mass-dependent Merger Rate Evolution since z = 1
Capak, P.; Scoville, N.; Gao, Y. +3 more
We present results of a statistical study of the cosmic evolution of the mass-dependent major-merger rate since z = 1. A stellar mass limited sample of close major-merger pairs (the CPAIR sample) was selected from the archive of the COSMOS survey. Pair fractions at different redshifts derived using the CPAIR sample and a local K-band-selected pair…
Discovery of Nine Gamma-Ray Pulsars in Fermi Large Area Telescope Data Using a New Blind Search Method
Caraveo, P. A.; de Luca, A.; Belfiore, A. +28 more
We report the discovery of nine previously unknown gamma-ray pulsars in a blind search of data from the Fermi Large Area Telescope (LAT). The pulsars were found with a novel hierarchical search method originally developed for detecting continuous gravitational waves from rapidly rotating neutron stars. Designed to find isolated pulsars spinning at…
A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy
Smail, I.; Pérez-Fournon, I.; Ivison, R. J. +48 more
We present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS J114637.9-001132 is selected from the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) as a strong lens candidate mainly based on its unusually high 500 µm flux density (~300 mJy). It is the only …
Two Types of Magnetic Reconnection in Coronal Bright Points and the Corresponding Magnetic Configuration
Ding, M. D.; Guo, Y.; Chen, P. F. +2 more
Coronal bright points (CBPs) are long-lived small-scale brightenings in the solar corona. They are generally explained by magnetic reconnection. However, the corresponding magnetic configurations are not well understood. We carry out a detailed multi-wavelength analysis of two neighboring CBPs on 2007 March 16, observed in soft X-ray (SXR) and EUV…
On Absorption by Circumstellar Dust, with the Progenitor of SN 2012aw as a Case Study
Kochanek, C. S.; Dai, X.; Khan, R.
We use the progenitor of SN 2012aw to illustrate the consequences of modeling circumstellar dust using Galactic (interstellar) extinction laws that (1) ignore dust emission in the near-IR and beyond, (2) average over dust compositions, and (3) mischaracterize the optical/UV absorption by assuming that scattered photons are lost to the observer. Th…
[C II] Line Emission in Massive Star-forming Galaxies at z = 4.7
Maiolino, R.; Iono, D.; Walter, F. +20 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C II] 157.7 µm fine structure line and thermal dust continuum emission from a pair of gas-rich galaxies at z = 4.7, BR1202-0725. This system consists of a luminous quasar host galaxy and a bright submillimeter galaxy (SMG), while a fainter star-forming galaxy…