1999A&A...351.1036A


Query : 1999A&A...351.1036A

1999A&A...351.1036A - Astronomy and Astrophysics, volume 351, 1036-1040 (1999/11-3)

PN G218.9-10.7: a galactic emission nebula of unique morphology.

ALI A. and PFLEIDERER J.

Abstract (from CDS):

We present an Hα+[NII] narrow band image and optical spectra of the galactic nebula PN G218.9-10.7 that has been hardly studied up to now and is suspected to be a planetary nebula. Its morphology is quite unusual: the nebula appears to consist of both symmetric components and asymmetric diffuse ones, and also displays long straight filaments in the east. It rather looks like a combination of morphological features found in HII regions, supernova remnants and planetary nebulae. The nebula has very low [OIII] emission, and is close to a very blue faint star that has been supposed to be of high gravity nature. Detailed description and attempt to give an interpretation of the morphology for this nebula are discussed. The spectral results of the object have been derived, such as the interstellar extinction, excitation class, electron temperature, and electron density.

Abstract Copyright:

Journal keyword(s): ISM: planetary nebulae: individual: PN G218.9-10.7 - ISM: planetary nebulae: general

Simbad objects: 12

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Number of rows : 12
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 WD 0029+571 WD* 00 31 53.2750189680 +57 22 48.847713996   18.442 18.551 18.562 18.531 DA 33 0
2 SH 2-176 PN 00 31 53.5 +57 22 33           ~ 48 1
3 SH 2-188 PN 01 30 33.1778575512 +58 24 50.325485868   17.424 17.447 17.398 17.376 DAO.6 99 1
4 PN HDW 5 PN 06 23 37.1527509624 -10 13 23.647569888           ~ 31 0
5 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 136 0
6 PN A66 35 PN 12 53 32.7857105088 -22 52 22.569625704   10.52 9.69     G8III-IV+DAO 187 1
7 SH 2-68 PN 18 24 58.4294414904 +00 51 36.021249072   16.0 16.5     DAOZ.6 126 1
8 PN M 4-12 PN 19 13 05.239 +15 46 39.80           ~ 86 0
9 NGC 6894 PN 20 16 23.965 +30 33 53.17           ~ 197 0
10 MWP 1 PN 21 17 08.2817782392 +34 12 27.415995372     12.33     PG1159 179 0
11 PN G107.7+07.8 PN 22 13 22.5173641536 +65 53 55.403639880   18.142 18.160 18.118 18.098 DA 34 1
12 WD 2218+706 WD* 22 19 33.6826662264 +70 56 03.182775504   15.268 15.495 15.568 15.631 DA.7 73 1

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2022.07.01-12:01:07

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