2005A&A...443..175B


Query : 2005A&A...443..175B

2005A&A...443..175B - Astronomy and Astrophysics, volume 443, 175-183 (2005/11-3)

Deep optical observations of the supernova remnants G 126.2+1.6, G 59.8+1.2 and G 54.4-0.3.

BOUMIS P., MAVROMATAKIS F., XILOURIS E.M., ALIKAKOS J., REDMAN M.P. and GOUDIS C.D.

Abstract (from CDS):

Optical CCD imaging and spectroscopic observations of three supernova remnants are presented. Optical emission from G 54.4-0.3 and G 59.8+1.2 is detected for the first time, while the first flux calibrated CCD images of the supernova remnant G 126.2+1.6 were performed in the optical emission lines of Hα+[NII], [OIII] and [SII]. A mixture of filamentary and diffuse structures is observed in G 54.4-0.3 and G 59.8+1.2, mainly in Hα+[NII], while the deep optical images of G 126.2+1.6 reveal several new filamentary and diffuse structures inside the extent of the remnant as defined by its known radio emission. In all cases, the radio emission is found to be well correlated with the optical filaments. [OIII] emission was not detected at G 54.4-0.3 and G 59.8+1.2 while in G 126.2+1.6, significant morphological differences between the low and medium ionization images are present suggesting incomplete shock structures. Deep long-slit spectra were taken at different positions of the remnants. Both the flux calibrated images and the long-slit spectra clearly show that the emission originates from shock-heated gas, while some spectra of G 126.2+1.6 are characterized by large [OIII]/Hβ ratios. This remnant's [OIII] flux suggests shock velocities into the interstellar ``clouds'' between 100 and 120km/s, while the [OIII] absence in the other two remnants indicates slower shock velocities. For all remnants, the [SII]λλ 6716/6731 ratio indicates electron densities below 600cm–3 with particularly low densities for G 54.4-0.3 (below 50cm–3). Finally, the Hα emission has been measured to be between 3.0 to 15.2x10–17erg/s/cm2/arcsec2, 3.2x10^-17 erg/s/cm2/arcsec2 and between 6.5 to 16.8x10–17erg/s/cm2/arcsec2 for G 54.4-0.3, G 59.8+1.2 and G 126.2+1.6, respectively.

Abstract Copyright:

Journal keyword(s): ISM: general - ISM: supernova remnants - ISM: individual objects: G 126.2+1.6, G 59.8+1.2, G 54.4-0.3

CDS comments: Table 1 Areas not in Simbad.

Simbad objects: 14

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Number of rows : 14
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 212 0
2 * 35 Cas PM* 01 21 05.2662699864 +64 39 29.274825816   6.425 6.322     A2Vnn 40 0
3 SNR G126.2+01.6 SNR 01 22.0 +64 15           ~ 49 0
4 * ksi02 Cet * 02 28 09.5570589539 +08 27 36.216809306 4.14 4.25 4.30 4.29 4.34 B9III 321 0
5 * 108 Vir * 14 45 30.2044637184 +00 43 02.180202816   5.656 5.665     B9.5V 149 0
6 SNR G017.4-02.3 SNR 18 30.9 -14 52           ~ 26 0
7 SNR G065.2+05.7 SNR 19 33.0 +31 10           ~ 94 0
8 SNR G054.4-00.3 SNR 19 33 20 +18 56.0           ~ 89 0
9 SNR G059.8+01.2 SNR 19 38.9 +24 19           ~ 23 0
10 * 58 Aql * 19 54 44.7948526968 +00 16 25.050363384   5.703 5.631     B9IV 204 0
11 * eps Aqr * 20 47 40.5526029 -09 29 44.787712 3.79 3.77 3.77 3.70 3.70 B9.5V 265 0
12 * 42 Peg PM* 22 41 27.7207176 +10 49 52.907917 3.10 3.33 3.41 3.43 3.50 B8V 294 0
13 SNR G114.3+00.3 SNR 23 37 05.780 +61 51 01.69           ~ 115 1
14 CTB 1 SNR 23 59 13 +62 26.2           ~ 147 0

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2022.08.10-06:52:18

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