VARIABILITY OF THE NUCLEAR RADIO-SOURCE IN M31

Authors
CRANE PC COWAN JJ DICKEL JR ROBERTS DA
Citation
Pc. Crane et al., VARIABILITY OF THE NUCLEAR RADIO-SOURCE IN M31, The Astrophysical journal, 417(2), 1993, pp. 120000061-120000062
Citations number
17
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
417
Issue
2
Year of publication
1993
Part
2
Pages
120000061 - 120000062
Database
ISI
SICI code
0004-637X(1993)417:2<120000061:VOTNRI>2.0.ZU;2-K
Abstract
The unresolved nuclear radio source in the galaxy M31 has been detecte d at a second epoch, with a luminosity one-quarter that of Sgr A. Bet ween the two epochs of observation (1990 June 8 and 9 and 1992 Novembe r 4 and 5), the flux density at lambda3.6 cm increased from 28 +/- 5 t o 39 +/- 5 muJy. The value of chi2 is consistent, at the 70% level, wi th variability about the mean flux density. The observed variability i s similar to that of Sgr A and strengthens the identification of the source in M31 as an analog of Sgr A.