2015AJ....149...43Y

Query : 2015AJ....149...43Y

2015AJ....149...43Y - Astron. J., 149, 43 (2015/February-0)

Searching for Be stars in the open cluster NGC 663.

YU P.C., LIN C.C., CHEN W.P., LEE C.D., IP W.H., NGEOW C.C., LAHER R., SURACE J. and KULKARNI S.R.

Abstract (from CDS):

We present Be star candidates in the open cluster NGC 663, identified by Hα imaging photometry with the Palomar Transient Factory Survey, as a pilot program to investigate how the Be star phenomena, the emission spectra, extended circumstellar envelopes, and fast rotation, correlate with massive stellar evolution. Stellar membership of the candidates was verified by 2MASS magnitudes and colors and by proper motions (PMs). We discover four new Be stars and exclude one known Be star from being a member due to its inconsistent PMs. The fraction of Be stars to member stars [N(Be)/N(members)] in NGC 663 is 3.5%. The spectral type of the 34 Be stars in NGC 663 shows bimodal peaks at B0-B2 and B5-B7, which is consistent with the statistics in most star clusters. Additionally, we also discover 23 emission-line stars of different types, including non-member Be stars, dwarfs, and giants.

Abstract Copyright: ∼

Journal keyword(s): galaxies: star clusters: individual: NGC 663 - stars: emission-line, Be

CDS comments: PKK 1 - 4 = 2MASS J01451168+6110229, 2MASS J01454789+6116239, 2MASS J01462440+6110372 and 2MASS J01471752+6113176 respectively.

Simbad objects: 37

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Number of rows : 37
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 Ass Cas OB 8 As* 01 44 +61.1           ~ 48 0
3 NGC 663 240 Be* 01 45 11.6808400608 +61 10 22.952780940           ~ 7 0
4 BD+60 325 Be* 01 45 18.0279360312 +61 06 56.475940176   10.47 10.083 9.90   B1Ve 38 0
5 EM* GGA 90 Be* 01 45 18.3562558224 +60 58 09.064704072 11.59 11.78 11.24 11.42   B 13 1
6 EM* GGA 93 Be* 01 45 37.8224440248 +61 07 59.088674136   12.79 12.135 12.31   B2Ve 26 0
7 EM* GGA 94 Be* 01 45 39.6178888368 +61 12 59.122135152   13.16 12.451 12.09   B2Ve 33 0
8 EM* GGA 95 Be* 01 45 46.3956587112 +61 09 20.905824744   12.52 11.937 11.77   B1Ve 25 0
9 NGC 663 128 * 01 45 47.8888726008 +61 16 23.943071604   14.32 13.54     ~ 14 0
10 EM* GGA 97 Be* 01 45 56.1027684240 +61 12 45.286198560   12.05 12.008 11.58   B2Ve 37 0
11 BD+60 332A Be* 01 45 59.3116427688 +61 12 45.626946804   11.20 10.51 10.35   B0/1Ve 35 0
12 NGC 663 84 Be* 01 46 02.0814816960 +61 15 02.099373516   14.74 13.96 13.92   B5Ve 22 0
13 EM* VES 616 Be* 01 46 06.1342275984 +61 13 39.204657012   12.06 11.509 11.35   B0-1Ve 29 0
14 NGC 663 51 Be* 01 46 14.0271487176 +61 13 43.833168048   13.88   12.85   B5Ve 22 0
15 EM* GGA 98 Be* 01 46 20.2301457288 +61 14 21.578249688   12.71 11.985 11.44   B2Ve 31 0
16 NGC 663 OpC 01 46 22.2 +61 12 53   7.78 7.1     ~ 269 0
17 NGC 663 61 Be* 01 46 24.4145506824 +61 10 37.281503712   14.24 13.52     B5-7Ve 22 0
18 BD+60 341 Be* 01 46 26.8455772104 +61 07 41.714872860   11.30 10.665 10.20   B0-1Ve 47 0
19 EM* GGA 99 Be* 01 46 26.9128044864 +61 14 11.174964252       12.19   B(e) 28 0
20 BD+60 340 Be* 01 46 27.0632788848 +61 10 01.916872536   10.59 10.12     B5III 44 0
21 NGC 663 21 Be* 01 46 27.6719617128 +61 12 25.441854228   11.24 10.538 10.34   Be 33 0
22 NGC 663 14 Be* 01 46 28.6234136256 +61 13 50.419798320   13.32 12.67     B3Ve 18 0
23 NGC 663 6 Be* 01 46 30.6369797712 +61 14 29.228497476   12.89 12.085 11.66   B1Ve 34 0
24 NGC 663 180 Be* 01 46 34.8662296248 +61 06 27.727787232     13.295     B5Ve 15 0
25 BD+60 343B Be* 01 46 35.5368670200 +61 15 47.826499356   10.90 10.286 9.85   B2Ve 30 0
26 EM* GGA 101 Be* 01 46 35.6086307160 +61 13 39.084655008   12.34 12.311     B1Ve 33 0
27 EM* GGA 103 Be* 01 46 57.5702157048 +61 01 40.450808676   12.08 11.525     B(e) 23 0
28 EM* VES 624 Be* 01 46 59.6009767344 +61 12 29.526299532   14.11 13.44     B5Ve 24 1
29 EM* GGA 104 HXB 01 47 00.2124077208 +61 21 23.663788056 11.76 12.09 11.366 11.00 10.52 B1IIIe 205 0
30 NGC 663 124 Be* 01 47 03.7497404040 +61 17 32.049000312     12.281 12.07   B2Ve 26 0
31 NGC 663 151 Be* 01 47 17.5279575144 +61 13 17.621286924           B5-7Ve 11 0
32 EM* GGA 108 Be* 01 47 26.7678254136 +61 08 44.133943920   12.11 11.53     B0-1Ve 35 0
33 EM* GGA 109 Be* 01 47 39.3759246120 +61 18 20.557961964   13.12 12.383     B1Ve 24 0
34 EM* GGA 110 Be* 01 48 23.0657043432 +61 15 53.051065812 11.12 11.3 10.867     B2Ve 24 0
35 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
36 NGC 2345 OpC 07 08 21.4 -13 11 44   8.58 7.7     ~ 92 0
37 NGC 7419 OpC 22 54 19.0 +60 48 50     13.0     ~ 113 0

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