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The Sub-Parsec Scale Radio Properties of Southern Starburst Galaxies. II. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 4945 Starburst
Tingay, S. J.; Lenc, E.
Wide-field, very long baseline interferometry observations of the nearby starburst galaxy NGC 4945, obtained with the Australian Long Baseline Array, have produced 2.3 GHz images over two epochs with a maximum angular resolution of 15 mas (0.3 pc). Fifteen sources were detected, 13 of which correspond to sources identified in higher frequency (3 c…
A Very Large Array Radio Survey of Early-Type Galaxies in the Virgo Cluster
Axon, David J.; Merritt, David; Capetti, Alessandro +2 more
We present the results of an 8.4 GHz Very Large Array radio survey of early-type galaxies extracted from the sample selected by Côté and collaborators for the Advanced Camera for Surveys Virgo Cluster Survey. The aim of this survey is to investigate the origin of radio emission in early-type galaxies and its link with the host properties in an une…
A Catalog of Visual Double and Multiple Stars With Eclipsing Components
Wolf, M.; Gazeas, K.; Liakos, A. +4 more
A new catalog of visual double systems containing eclipsing binaries as one component is presented. The main purpose of this catalog is to compile a complete list of all known multiples of this variety, both for current analysis and to highlight those in need of additional observations. All available photometric and astrometric data were analyzed,…
Structures of Local Galaxies Compared to High-Redshift Star-Forming Galaxies
Gardner, Jonathan P.; Smith, Linda J.; Lotz, Jennifer M. +4 more
The rest-frame far-ultraviolet morphologies of eight nearby interacting and starburst galaxies (Arp 269, M 82, Mrk 8, NGC 520, NGC 1068, NGC 3079, NGC 3310, and NGC 7673) are compared with 54 galaxies at z ~ 1.5 and 46 galaxies at z ~ 4 observed in the Great Observatories Origins Deep Survey (GOODS) taken with the Advanced Camera for Surveys onboa…
Accretion Properties of a Sample of Hard X-Ray (<60 keV) Selected Seyfert 1 Galaxies
Wang, J.; Wei, J. Y.; Mao, Y. F.
We examine the accretion properties in a sample of 42 hard (3-60 keV) X-ray selected nearby broad-line active galactic nuclei (AGNs). The energy range in the sample is harder than that usually used in similar previous studies. These AGNs are mainly complied from the RXTE All Sky Survey, and complemented by the released INTEGRAL AGN catalog. The bl…
Massive Star Multiplicity: The Cepheid W Sgr
Evans, Nancy Remage; Massa, Derck; Proffitt, Charles
We have obtained spectra of the W Sgr system with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope (HST). The spectra resolve the system into a distant companion B which is the hottest star in the system and the spectroscopic binary (A = Aa + Ab). A and B are separated by 0farcs16. We have extracted the spectra of both of the…
Three-Dimensional Spectroscopic Study of the Line-Emitting Regions of Mrk 493
Moiseev, A. V.; Popović, L. Č.; Afanasiev, V. L. +2 more
We report the results of three-dimensional spectroscopic observations of Mrk 493 (narrow-line Seyfert 1 galaxy) with the integral-field spectrograph MultiPupil Fiber Spectrograph of the Special Astrophysical Observatory of the Russian Academy of Sciences 6 m telescope. The difference in the slope of the optical continuum emission intensity across …
Diffuse Cluster-Like Radio Emission in Poor Environments
Rudnick, Lawrence; Brown, Shea
We present a study of the spectral, polarimetric, morphological, and environmental properties of the diffuse radio source 0809+39 using observations taken with the Westerbork Synthesis Radio Telescope, the Very Large Array, and archival optical and X-ray data. The source has two distinct diffuse, steep-spectrum components, one in the north that is…
The ACS Survey of Galactic Globular Clusters. VI. NGC 6366: A Heavily Stripped Galactic Globular Cluster
Anderson, Jay; Dotter, Aaron; Sarajedini, Ata +12 more
We have used observations obtained as part of the Hubble Space Telescope/ACS Survey of Galactic globular clusters (GCs) to construct a color-magnitude diagram for the bulge cluster, NGC 6366. The luminosity function derived from those data extends to M F606W ~ 9, or masses of ~0.3 M sun. Unlike most GCs, the mass function pea…
The Luminosity Function of Galaxies to MBgVriz ~ -14 in z ~ 0.3 Clusters
De Propris, Roberto; Harsono, Daniel
We present deep composite luminosity functions (LFs) in B, g, V, r, i, and z for six clusters at 0.14 < z < 0.40 observed with the Hubble Space Telescope Advanced Camera for Surveys. The LFs reach to an absolute magnitude of ~-14 + 5log h mag and are well fitted by a single Schechter function with M* BgVriz = -19.8, - 20.9 - 21.9…