Two New X‐Ray/Optical/Radio Supernova Remnants in M31 | Zendy

Benjamin F. Williams | Zendy; Loránt O. Sjouwerman | Zendy; A. K. H. Kong | Zendy; Joseph Gelfand | Zendy; M. R. Garcia | Zendy; S. S. Murray | Zendy

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Two New X‐Ray/Optical/Radio Supernova Remnants in M31

Author(s) -

Benjamin F. Williams,

Loránt O. Sjouwerman,

A. K. H. Kong,

Joseph Gelfand,

M. R. Garcia,

S. S. Murray

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/424589

Subject(s) - supernova , astrophysics , physics , narrowband , flux (metallurgy) , bulge , astronomy , 3d optical data storage , wavelength , galaxy , optics , materials science , metallurgy

We compare a deep (37 ks) Chandra ACIS-S image of the M31 bulge to LocalGroup Survey narrow-band optical data and Very Large Array (VLA) radio data ofthe same region. Our precisely registered images reveal two new optical shellswith X-ray counterparts. These shells have sizes, [S II]/H-alpha flux ratios,and X-ray spectral properties typical of supernova remnants (SNRs) with ages of9$^{+3}_{-4}$ and 17$^{+6}_{-9}$ kyr. Analysis of complementary VLA datareveals the radio counterparts, further confirming that they are SNRs. Wediscuss and compare the properties and morphologies of these SNRs at thedifferent wavelengths.Comment: 18 pages, 5 figures, accepted for publication in Ap

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