A wide-field, low-frequency radio image of the field of M31. II. Source classification and discussion

Joseph (Yosi) Gelfand, T. Joseph W. Lazio, B. M. Gaensler

    Research output: Contribution to journalReview article

    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 -1. Here we compare the resultant source list and image with other radio, IR, optical, and X-ray observations and catalogs of the region. Through this, we were able to identify five supernova remnant candidates and three pulsar wind nebula 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 (θ ≲ 6″) extremely steep-spectrum sources (α ≤ -1.6; S v ∝ V α) were detected whose nature is unknown.

    Original languageEnglish (US)
    Pages (from-to)242-276
    Number of pages35
    JournalAstrophysical Journal, Supplement Series
    Volume159
    Issue number2
    DOIs
    StatePublished - Aug 1 2005

    Fingerprint

    radio galaxies
    radio stars
    radio
    low frequencies
    Very Large Array (VLA)
    planetary nebulae
    supernova remnants
    nebulae
    lists
    pulsars
    catalogs
    galaxies
    sensitivity
    configurations
    x rays
    merger

    Keywords

    • Catalogs
    • Galaxies: individual (M31)
    • Radio continuum: galaxies
    • Radio continuum: general

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    A wide-field, low-frequency radio image of the field of M31. II. Source classification and discussion. / Gelfand, Joseph (Yosi); Lazio, T. Joseph W.; Gaensler, B. M.

    In: Astrophysical Journal, Supplement Series, Vol. 159, No. 2, 01.08.2005, p. 242-276.

    Research output: Contribution to journalReview article

    Gelfand, Joseph (Yosi) ; Lazio, T. Joseph W. ; Gaensler, B. M. / A wide-field, low-frequency radio image of the field of M31. II. Source classification and discussion. In: Astrophysical Journal, Supplement Series. 2005 ; Vol. 159, No. 2. pp. 242-276.
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    AU - Gaensler, B. M.

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