2002A&A...396..225B


Query : 2002A&A...396..225B

2002A&A...396..225B - Astronomy and Astrophysics, volume 396, 225-234 (2002/12-2)

New optical filamentary structures in Pegasus.

BOUMIS P., MAVROMATAKIS F., PALEOLOGOU E.V. and BECKER W.

Abstract (from CDS):

Deep Hα+[N II] CCD images have been obtained in the area of the Pegasus Constellation. The resulting mosaic covers an extent of ∼7.5degx8.5deg and filamentary and diffuse emission was discovered. Several long filaments (up to ∼1°) are found within the field, while diffuse emission is present mainly in the central and northern areas. The filaments show variations in intensity along their extent suggesting inhomogeneous interstellar clouds. Faint soft X-ray emission was also detected in the ROSAT All-Sky Survey. It is mainly concentrated in the central areas of our field and overlaps the optical emission. The low ionization images of [S II] of selected areas mainly show faint diffuse emission, while in the medium ionization images of [O III] diffuse and faint filamentary structures are present. Spectrophotometric observations were performed on the brightest filaments and indicate emission from photoionized or shock-heated gas. The sulfur line ratios indicate electron densities below ∼600cm–3, while the absolute Hα emission lies in the range of 1.1-8.8x10–17erg/s/cm2/arcsec2. The detected optical line emission could be part of a single or multiple supernova explosions.

Abstract Copyright:

Journal keyword(s): ISM: general - ISM: supernova remnants - ISM: individual objects: Pegasus

Nomenclature: Fig.1, Table 2: [BMP2002] FNa (Nos F1-F8, F2a-F2b, F5a-F5b).

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * 29 Psc V* 00 01 49.4481127032 -03 01 39.011820024 4.47 4.98 5.10     B7III-IV 211 0
2 * ksi02 Cet * 02 28 09.5570589539 +08 27 36.216809306 4.14 4.25 4.30 4.29 4.34 B9III 317 0
3 * 108 Vir * 14 45 30.2044637184 +00 43 02.180202816   5.656 5.665     B9.5V 149 0
4 * 58 Aql * 19 54 44.7948526968 +00 16 25.050363384   5.703 5.631     B9IV 202 0
5 * eps Aqr * 20 47 40.5526029 -09 29 44.787712 3.79 3.77 3.77 3.70 3.70 B9.5V 264 0
6 PSR B2110+27 Psr 21 13 04.3895 +27 54 02.290           ~ 95 0
7 PSR B2113+14 Psr 21 16 13.7390 +14 14 21.000           ~ 77 0
8 * 1 Peg PM* 21 22 05.1994953807 +19 48 16.237518964 6.25 5.20 4.09 3.30 2.76 K1III 177 0
9 PSR B2122+13 Psr 21 24 46.574 +14 07 19.30           ~ 31 0
10 HD 204560 V* 21 28 59.9178575400 +17 54 21.283075080   7.810 6.401     K5 12 0
11 HD 205300 * 21 33 58.4266559016 +17 26 42.394990704   8.99 7.593     K2 9 0

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2022.05.24-23:47:55

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