A Wide Field, Low Frequency Radio Image of the Field of M31: II. -- Source Classification and Discussion

Abstract

We have previously presented the results of a 325 MHz radio survey of M31, conducted with the A-configuration of the Very Large Array. In this survey, a total of 405 radio sources between <6" and 170" in extent were mapped with a resolution of 6" and a sensitivity of ~0.6 mJy/beam. Here, we compare the resultant source list and image with other radio, IR, optical, X-ray observations and catalogs of the region. Through this, we were able to identify five supernova remnant (SNR) candidates and three pulsar wind nebula (PWN) candidates in M31, as well as three Milky Way radio stars, a possible Milky Way Planetary Nebula, and a bevy of interesting extragalactic objects: a BL Lac, a Giant Radio Galaxy, a galaxy merger, and several high-z radio galaxy candidates. In addition, a large number of compact (<6") extremely steep spectrum sources ($\alpha \le -1.6;S_{\nu }\propto {\nu }^{\alpha }$) were detected whose nature is unknown.

arXiv comment30 pages, 23 tables, + 18 figures. Low-resolution figures are available here in .jpg form. ApJS accepted, to be published in August 2005, v159 2 issue

References in corpus (26)

• The SIMBAD astronomical database
• The USNO-B Catalog
• 2MASS Extended Source Catalog: Overview and Algorithms
• BL Lac Objects in the Synchrotron Proton Blazar Model
• A New $\Sigma -D$ Relation and Its Application to the Galactic Supernova Remnant Distribution
• Distance to M31 With the HST and Hipparcos Red Clump Stars
• Near-infrared imaging and the K-z relation for radio galaxies in the 7C Redshift Survey
• A Sample of 669 Ultra Steep Spectrum Radio Sources to Find High Redshift Radio Galaxies
• X-ray Emission Processes in Radio Jets
• X-ray Point Sources in The Central Region of M31 as seen by Chandra
• Giant Pulses from PSR B0540-69 in the Large Magellanic Cloud
• Optical and Infrared Colors of Stars Observed by 2MASS and SDSS
• Multifrequency Observations of Giant Radio Pulses from the Millisecond Pulsar B1937+21
• A new sample of giant radio galaxies from the WENSS survey: I - Sample definition, selection effects and first results
• A new sample of giant radio galaxies from the WENSS survey II - A multi-frequency radio study of a complete sample: Properties of the radio lobes and their environment
• The second ROSAT PSPC survey of M31 and the complete ROSAT PSPC source list
• A Chandra High-Resolution Camera Observation of X-Ray Point Sources in M31
• The BL Lac objects OQ 530 and S5 0716+714. Simultaneous observations in the X-rays, radio, optical and TeV bands
• Bright X-Ray Sources in M31 Globular Clusters
• Variability of sub-mJy radio sources
• Detailed Radio Spectra of Selected Compact Sources in the Nucleus of M82
• A Deep, High-Resolution Survey at 74 MHz
• Spatially-resolved Thermal Continuum Absorption against the Supernova Remnant W49B
• High Resolution IRAS Maps and IR Emission of M31 --- I. Morphology and Sources
• On the efficiency of the Ultra Steep Spectrum technique in finding High-z Radiogalaxies
• A Wide Field, Low Frequency Radio Survey of the Field of M31: I. Construction and Statistical Analysis of the Source Catalog

Cited by in corpus (9)

• SubmilliJansky Transients in Archival Radio Observations
• The deep XMM-Newton Survey of M 31
• A Wide-area VLA Continuum Survey near the Galactic Center at 6 and 20 cm Wavelengths
• Supernova remnants and candidates detected in the XMM-Newton M31 large survey
• The bulk kinetic power of radio jets in active galactic nuclei
• A search for radio pulsars and fast transients in M31 using the WSRT
• What are the megahertz peaked-spectrum sources?
• J004457+4123 (Sharov 21): not a remarkable nova in M31 but a background quasar with a spectacular UV flare
• Widefield VLBI observations of M31: A Unique Probe of the Ionized ISM of a nearby galaxy