Query : 1997A&A...327..569A

1997A&A...327..569A - Astronomy and Astrophysics, volume 327, 569-576 (1997/11-2)

The large scale structure of the Galactic center at low radio frequencies.


Abstract (from CDS):

A region about 10° around the galactic center (G.C.) has been studied in surveys available between 19.7 and 408MHz. The maps show a trough near the G.C. sided by two intense emission peaks. Interpreting the observations as produced by an HII region that absorbs the radiation from bright non-thermal sources we propose a model consisting of four sources concentric with the G.C. and embedded in a diffused non-thermal background. Two sources, the broad and the narrow, are non-thermal and we determine their temperature spectrum (indices -2.7 and -2.4, respectively), the third source is an HII region for which we compute the emission measure, and the fourth source is Sgr A complex. The broad source is prominently seen below 408 MHz while the presence of the narrow source is reported here for the first time.

Abstract Copyright:

Journal keyword(s): Galaxy: center - Galaxy: structure - Radio continuum: general

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 931 0
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12903 0
3 SNR G006.4-00.1 SNR 18 01 22.7 -23 17 20           ~ 693 1

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