Search Publications
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…
The Evolution of Mass-Size Relation for Lyman Break Galaxies from z = 1 to z = 7
Franx, Marijn; Illingworth, Garth D.; Bouwens, Rychard J. +6 more
For the first time, we study the evolution of the stellar mass-size relation for star-forming galaxies from z ~ 4 to z ~ 7 from Hubble-WFC3/IR camera observations of the HUDF and Early Release Science field. The sizes are measured by determining the best-fit model to galaxy images in the rest-frame 2100 Å with the stellar masses estimated from spe…
A Double Main Sequence in the Globular Cluster NGC 6397
Anderson, J.; Milone, A. P.; Marino, A. F. +5 more
High-precision multi-band Hubble Space Telescope (HST) photometry reveals that the main sequence of the globular cluster NGC 6397 splits into two components, containing ~30% and ~70% of the stars. This double sequence is consistent with the idea that the cluster hosts two stellar populations: (1) a primordial population that has a composition simi…
[C II] 158 µm Luminosities and Star Formation Rate in Dusty Starbursts and Active Galactic Nuclei
Lebouteiller, V.; Engels, D.; Stacey, G. +8 more
Results are presented for [C II] 158 µm line fluxes observed with the Herschel PACS instrument in 112 sources with both starburst and active galactic nucleus (AGN) classifications, of which 102 sources have confident detections. Results are compared with mid-infrared spectra from the Spitzer Infrared Spectrometer and with L ir fro…
The UVJ Selection of Quiescent and Star-forming Galaxies: Separating Early- and Late-type Galaxies and Isolating Edge-on Spirals
Franx, Marijn; Kelson, Daniel D.; Illingworth, Garth D. +3 more
We utilize for the first time Hubble Space Telescope Advanced Camera for Surveys imaging to examine the structural properties of galaxies in the rest-frame U - V versus V - J diagram (i.e., the UVJ diagram) using a sample at 0.6 < z < 0.9 that reaches a low stellar mass limit (log M/M ⊙ >10.25). The use of the UVJ diagram as a …
On Spectral Breaks in the Power Spectra of Magnetic Fluctuations in Fast Solar Wind between 0.3 and 0.9 AU
Maksimovic, M.; Alexandrova, O.; Marsch, E. +1 more
We analyze the radial variation of the power spectra of the magnetic field from 0.3 to about 0.9 AU, using Helios 2 spacecraft measurements in the fast solar wind. The time resolution of the magnetic field data allows us to study the power spectra up to 2 Hz. Generally, the corresponding spectral break frequency fb and the Doppler-shift…