Astrophys. J., Suppl. Ser., 241, 37-37 (2019/April-0)
A new, deep JVLA radio survey of M33.
WHITE R.L., LONG K.S., BECKER R.H., BLAIR W.P., HELFAND D.J. and WINKLER P.F.
Abstract (from CDS):
We have performed new 1.4 and 5 GHz observations of the Local Group galaxy M33 with the Jansky Very Large Array. Our survey has a limiting sensitivity of 20 µJy (4σ) and a resolution of 5.''9 (FWHM), corresponding to a spatial resolution of 24 pc at 817 kpc. Using a new multiresolution algorithm, we have created a catalog of 2875 sources, including 675 with well-determined spectral indices. We detect sources at the position of 319 of the X-ray sources in the Tullmann et al. Chandra survey of M33, the majority of which are likely to be background galaxies. The radio source coincident with M33 X-8, the nuclear source, appears to be extended. Along with numerous H II regions or portions of H II region complexes, we detect 155 of the 217 optical supernova remnants (SNRs) included in the lists of Long et al. and Lee & Lee, making this by far the largest sample of remnants at known distances with multiwavelength coverage. The remnants show a large dispersion in the ratio of radio to X-ray luminosity at a given diameter, a result that challenges the current generation of models for synchrotron radiation evolution in SNRs.
© 2019. The American Astronomical Society.
galaxies: individual: M33 - ISM: supernova remnants - radio continuum: galaxies - radio continuum: ISM - X-rays: individual: M33 X-8
Status in Simbad:
waiting for electronic table
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