2007A&A...472..163K

Query : 2007A&A...472..163K

2007A&A...472..163K - Astronomy and Astrophysics, volume 472163-167 (2007/9-2)

The Hα stellar and interstellar emission in the open cluster NGC 6910.

KUBAT J., KORCAKOVA D., KAWKA A., PIGULSKI A., SLECHTA M. and SKODA P.

Abstract (from CDS):

We verify the nature of emission-line stars in the field of the open cluster NGC 6910. Spectroscopy in the Hα region was obtained. Raw CCD frames of spectra of all stars fainter than V=9mag observed by us are significantly affected by nebular emission originating in the surrounding HII region IC 1318. After careful data reduction and subtraction of the nebular radiation we succeeded in obtaining reliable stellar spectra. We confirm that the star NGC 6910 37 is a Be star, and we have corrected the classification of V1973 Cyg from an Ae star to a normal A type star. Since the diffuse interstellar bands do not appear in the spectrum of this star while being present in the other stars we observed, we confirm that V1973 Cyg is a foreground object with respect to IC 1318 and NGC 6910. We also find that the Hα line in HD 194279 has a P Cygni profile and the Hα line profile is variable in HD 229196.

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Journal keyword(s): Galaxy: open clusters and associations: individual: NGC 6910 - stars: emission-line, Be - stars: individual: V1973 Cyg - ISM: individual objects: IC 1318

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 445 0
2 IC 1318 HII 20 16 48 +41 57.4           ~ 46 0
3 Ass Cyg OB 9 As* 20 21 +39.9           ~ 136 0
4 LS III +40 12 bC* 20 23 07.5749623752 +40 46 08.882776740 11.058 11.239 10.412 18.755 9.355 B0.5V 31 0
5 V* V1973 Cyg V* 20 23 07.8590917560 +40 51 13.172452488   10.21 10.01     A3V 30 0
6 BD+40 4146B Be* 20 23 09.8116404672 +40 45 52.256529216 13.603 13.542 12.625 12.030 11.397 B3Ve 11 0
7 BD+40 4146 * 20 23 10.4645410968 +40 45 52.325302104 10.331 10.485 9.670 9.44 8.529 B1 27 0
8 HD 229196 Pu* 20 23 10.7840350992 +40 52 29.847533160 9.29 9.32 8.59     O6II(f) 123 0
9 NGC 6910 OpC 20 23 12.2 +40 46 16           ~ 202 0
10 BD+40 4148 SB* 20 23 14.5482525288 +40 45 19.094737320     10.307     O9.5:V 24 0
11 NGC 6910 25 * 20 23 16.1857812840 +40 45 18.983702268 12.483 12.459 11.498 10.862   B3 11 0
12 HD 194279 s*b 20 23 18.1647782064 +40 45 32.598481500 8.01 8.04 7.01 5.98 5.17 B2Ia 200 0
13 TYC 3156-65-1 * 20 23 41.1025024128 +39 37 00.500633220   12.03 11.38 10.94   ~ 2 0
14 IC 1318b ISM 20 27 +40.5           ~ 17 0
15 NAME RSF 2 Cyg reg ~ ~           ~ 2 1

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