20cm VLA radio-continuum study of M31: Images and point source catalogues
We present a series of new high-sensitivity and high-resolution radio-continuum images of M31 at λ=20 cm (ν=1.4 GHz). These new images were produced by merging archived 20 cm radio-continuum observations from the Very Large Array (VLA) telescope. Images presented here are sensitive to rms=6...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Astronomical Observatory, Department of Astronomy, Belgrade
2012-01-01
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| Series: | Serbian Astronomical Journal |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-698X/2012/1450-698X1284041G.pdf |
| _version_ | 1811270266019381248 |
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| author | Galvin T.J. Filipović M.D. Crawford E.J. Tothill N.F.H. Wong G.F. de Horta A.Y. |
| author_facet | Galvin T.J. Filipović M.D. Crawford E.J. Tothill N.F.H. Wong G.F. de Horta A.Y. |
| author_sort | Galvin T.J. |
| collection | DOAJ |
| description | We present a series of new high-sensitivity and high-resolution
radio-continuum images of M31 at λ=20 cm (ν=1.4 GHz). These new images were
produced by merging archived 20 cm radio-continuum observations from the Very
Large Array (VLA) telescope. Images presented here are sensitive to rms=60
μJy and feature high angular resolution (<10’’). A complete sample of
discrete radio sources have been catalogued and analyzed across 17 individual
VLA projects. We identified a total of 864 unique discrete radio sources
across the field of M31. One of the most prominent regions in M31 is the ring
feature for which we estimated total integrated flux of 706 mJy at λ=20 cm.
We compare here detected sources to those listed in Gelfand et al. (2004) at
λ=92 cm and find 118 sources in common to both surveys. The majority (61%) of
these sources exhibit a spectral index of α <-0.6 indicating that their
emission is predominantly non-thermal in nature, that is more typical for
background objects. |
| first_indexed | 2024-04-12T21:58:52Z |
| format | Article |
| id | doaj.art-cfe56f2efb6c4178b233f0c34adddff7 |
| institution | Directory Open Access Journal |
| issn | 1450-698X 1820-9289 |
| language | English |
| last_indexed | 2024-04-12T21:58:52Z |
| publishDate | 2012-01-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-cfe56f2efb6c4178b233f0c34adddff72022-12-22T03:15:14ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92892012-01-012012184416810.2298/SAJ1284041G1450-698X1284041G20cm VLA radio-continuum study of M31: Images and point source cataloguesGalvin T.J.0Filipović M.D.1Crawford E.J.2Tothill N.F.H.3Wong G.F.4de Horta A.Y.5University of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaUniversity of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaUniversity of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaUniversity of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaUniversity of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaUniversity of Western Sydney, Locked Bag, Penrith South DC, NSW, AustraliaWe present a series of new high-sensitivity and high-resolution radio-continuum images of M31 at λ=20 cm (ν=1.4 GHz). These new images were produced by merging archived 20 cm radio-continuum observations from the Very Large Array (VLA) telescope. Images presented here are sensitive to rms=60 μJy and feature high angular resolution (<10’’). A complete sample of discrete radio sources have been catalogued and analyzed across 17 individual VLA projects. We identified a total of 864 unique discrete radio sources across the field of M31. One of the most prominent regions in M31 is the ring feature for which we estimated total integrated flux of 706 mJy at λ=20 cm. We compare here detected sources to those listed in Gelfand et al. (2004) at λ=92 cm and find 118 sources in common to both surveys. The majority (61%) of these sources exhibit a spectral index of α <-0.6 indicating that their emission is predominantly non-thermal in nature, that is more typical for background objects.http://www.doiserbia.nb.rs/img/doi/1450-698X/2012/1450-698X1284041G.pdftechniques: image processingradio continuumcatalogs |
| spellingShingle | Galvin T.J. Filipović M.D. Crawford E.J. Tothill N.F.H. Wong G.F. de Horta A.Y. 20cm VLA radio-continuum study of M31: Images and point source catalogues Serbian Astronomical Journal techniques: image processing radio continuum catalogs |
| title | 20cm VLA radio-continuum study of M31: Images and point source catalogues |
| title_full | 20cm VLA radio-continuum study of M31: Images and point source catalogues |
| title_fullStr | 20cm VLA radio-continuum study of M31: Images and point source catalogues |
| title_full_unstemmed | 20cm VLA radio-continuum study of M31: Images and point source catalogues |
| title_short | 20cm VLA radio-continuum study of M31: Images and point source catalogues |
| title_sort | 20cm vla radio continuum study of m31 images and point source catalogues |
| topic | techniques: image processing radio continuum catalogs |
| url | http://www.doiserbia.nb.rs/img/doi/1450-698X/2012/1450-698X1284041G.pdf |
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