2003A&A...398.1063I


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST18:07:33

2003A&A...398.1063I - Astronomy and Astrophysics, volume 398, 1063-1071 (2003/2-2)

The peculiar nebula Simeis 57. I. Ionized gas and dust extinction.

ISRAEL F.P., KLOPPENBURG M., DEWDNEY P.E. and BALLY J.

Abstract (from CDS):

We present high resolution radio continuum maps of the Galactic nebula Simeis 57 (= HS 191 = G 80.3+4.7) made at the Westerbork Synthesis Radio Telescope and the Dominion Radio Astrophysical Observatory at frequencies of 609, 1412 and 1420 MHz. At optical and at radio wavelengths, the nebula has a peculiar ``S'' shape, crossed by long, thin and straight filaments. The radio maps, combined with other maps from existing databases, show essentially all radio emission from the peculiar and complex nebula to be thermal and optically thin. Although neither the distance nor the source of excitation of Simeis 57 are known, the nebula can only have a moderate electron density of typically ne=100cm–3. Its mass is also low, not exceeding some tens of solar masses. Peak emission measures are 5000pc/cm6. Obscuring dust is closely associated with the nebula, but seems to occur mostly in front of it. Extinctions vary from AV=1.0mag to AV=2.8mag with a mean of about 2 mag. The extinction and the far-infrared emission at λ100 µm are well-correlated.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: Simeis 57 - ISM: HII regions - radio continuum: ISM

Simbad objects: 16

goto Full paper

goto View the reference in ADS

Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2130 2
2 DWB 120 HII 20 14.0 +44 06           ~ 2 0
3 DWB 108 HII 20 15.6 +43 23           ~ 2 0
4 DWB 126 HII 20 15.8 +44 12           ~ 2 0
5 DWB 83 HII 20 16.0 +41 59           ~ 9 0
6 DWB 111 HII 20 16.0 +43 40           ~ 4 0
7 SIM 57 ISM 20 16 16.8 +43 44 18           ~ 5 0
8 DWB 118 HII 20 16.4 +43 40           ~ 4 0
9 DWB 119 HII 20 16.6 +43 46           ~ 4 0
10 DWB 107 HII 20 17.2 +43 11           ~ 2 0
11 DWB 125 HII 20 17.2 +44 07           ~ 2 0
12 DWB 136 HII 20 17.8 +44 34           ~ 2 0
13 SNR G082.2+05.3 SNR 20 19.0 +45 30           ~ 86 0
14 DWB 117 HII 20 19.4 +43 19           ~ 3 0
15 DWB 131 HII 20 20.7 +44 05           ~ 2 0
16 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 633 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2003A&A...398.1063I and select 'bookmark this link' or equivalent in the popup menu


2020.10.24-18:07:33

© Université de Strasbourg/CNRS

    • Contact