2018AJ....156...61D

Query : 2018AJ....156...61D

2018AJ....156...61D - Astron. J., 156, 61-61 (2018/August-0)

A study of the Hα variability of Be stars.

DIMITROV D.P., KJURKCHIEVA D.P. and IVANOV E.I.

Abstract (from CDS):

This paper presents the results of 4 years of high-resolution spectral observations of 69 emission-line stars, 54 of them being newly discovered sources. We classified the stars on the basis of their position in the two-color IR diagram and some additional criteria: shape and width of the Hα profile, presence of He lines, proper motion and parallax, membership to open cluster and associations. Sixty of our targets turned out to be Be stars. We also found four late giants, four pre-MS stars, and one late dwarf. The Hα emission profiles of our Be stars range from single peaked to typical shell profiles that can also be highly asymmetric or single-peaked profiles with a narrow absorption core. The emission profiles appear almost constant with time or highly variable in intensity and in their V/R ratio. The detected long-term variability of the Hα emission is important for investigating the on/off switch phenomenon of Be stars. Our study led to an increase of the number of the emission-line stars of 16 open clusters.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): line: profiles - open clusters and associations: general - stars: early-type - stars: emission-line, Be

VizieR on-line data: <Available at CDS (J/AJ/156/61): table1.dat table2.dat table4.dat>

Simbad objects: 99

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Number of rows : 99
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 7822 HII 00 01 08.58 +67 25 17.0           ~ 121 3
2 UCAC4 788-000083 Y*? 00 02 26.7821307696 +67 34 26.919212340   14.76 13.58 13.38   ~ 6 0
3 NGC 130 GiG 00 29 18.5409015096 +02 52 13.502672292   15       ~ 42 0
4 LS I +60 111 Em* 00 29 56.4423012744 +60 21 08.948554380 11.58 11.96 11.33     B 16 0
5 HIP 2382 Be* 00 30 24.4495706712 +60 10 09.248158092 11.27 11.35 10.89     B6III 37 0
6 NGC 129 OpC 00 30 25.8 +60 12 44   7.33 6.5     ~ 216 0
7 LS I +60 112 Em* 00 30 35.0972073240 +60 19 06.556666044 11.43 11.90 11.68     OB- 16 0
8 NGC 129 33 Em* 00 30 47.3284562928 +60 14 35.610185544 12.94 12.57 12.12     ~ 11 0
9 TYC 4019-49-1 Em* 00 33 27.5036629848 +63 29 22.102631448   11.52 11.00     ~ 2 0
10 Cl King 16 OpC 00 43 44.8 +64 10 13           ~ 32 0
11 UCAC4 771-005403 Em* 00 43 45.1059382248 +64 10 15.550566780       13.29   ~ 2 0
12 LS I +63 95 Em* 00 43 46.4057825259 +64 10 41.843472560   11.415 10.797     B 9 0
13 V* V386 Cas EB* 00 59 11.2667437224 +55 57 20.038443336           ~ 11 0
14 Cl Berkeley 62 OpC 01 01 13.3 +63 55 31   9.98 9.3     ~ 57 0
15 Cl Berkeley 62 1 Be* 01 01 25.548 +63 58 25.10   14.32 13.62 13.41   B7Ve 3 0
16 NGC 457 124 Be* 01 19 02.3624855904 +58 19 20.248805532 12.08 12.23 11.95     B3Ve 16 0
17 NGC 457 OpC 01 19 32.4 +58 16 40   6.97 6.4     ~ 259 2
18 NGC 457 6 Be* 01 19 32.9891856048 +58 17 25.462308228 10.65 11.22 10.60     B3Ve 15 0
19 BD+60 236 Em* 01 26 35.5846676856 +61 34 26.513273676   11.56 11.08     OB- 9 0
20 UCAC4 757-014461 Em* 01 28 10.6687742712 +61 18 15.847809732   14.33 13.70 13.62   ~ 1 0
21 IPHAS J013402.88+611358.6 Be* 01 34 02.8529960136 +61 13 58.601996220           B7-8Ve 2 0
22 IPHAS J013539.04+610341.6 Be* 01 35 39.0326930928 +61 03 41.600790504           B7Ve 2 0
23 BD+60 276 ** 01 35 40.0284758952 +61 17 12.859877760   10.29 9.97     ~ 7 0
24 Cl Trumpler 1 OpC 01 35 40.1 +61 17 09   8.35 8.1     ~ 108 0
25 UCAC4 759-014155 Em* 01 38 39.7859563272 +61 36 34.274337048     13.19 13.02   ~ 1 0
26 UCAC4 759-014393 Em* 01 40 30.6347334096 +61 42 17.541267804       13.84   ~ 2 0
27 BD+60 302 Em* 01 40 42.7226237880 +61 12 54.286194348   10.58 10.19     B2 4 0
28 TYC 4031-2439-1 Em* 01 41 03.5997701424 +61 40 36.266397276   12.67 12.31     ~ 1 0
29 UCAC4 755-019877 Em* 01 44 26.0044378992 +60 53 44.752096788     12.87 12.81   ~ 1 0
30 NGC 663 101 Em* 01 46 03.4557411168 +61 10 58.468852632     13.04 12.98   ~ 12 0
31 NGC 663 OpC 01 46 22.2 +61 12 53   7.78 7.1     ~ 269 0
32 NGC 663 14 Be* 01 46 28.6234136256 +61 13 50.419798320   13.32 12.67     B3Ve 18 0
33 UCAC4 763-016871 SB* 01 53 13.0103614872 +62 28 59.090751300     12.84 12.58   ~ 2 0
34 NGC 884 1772 Be? 02 20 52.7850825960 +57 13 27.799076496   11.782 11.1483   10.5630 B2 15 0
35 NGC 884 2085 Em* 02 21 42.9369067272 +57 05 30.612889284     11.2473   10.7916 B3 24 0
36 LS V +57 16 Em* 02 21 57.3650485680 +57 20 21.777407988   11.287 10.783     OB- 20 0
37 NGC 884 OpC 02 22 15.7 +57 08 59           ~ 503 0
38 NGC 884 2579 bC* 02 22 50.2867868448 +57 08 50.627383440   12.293 11.9367   11.4978 B3e 22 0
39 NGC 884 2622 Em* 02 23 00.0616460808 +57 12 13.977285300   12.309 11.858   11.354 B1.6V 18 0
40 2MASS J02324373+6128097 Y*O 02 32 43.7390814864 +61 28 09.691833900 15.31 14.93 14.166 13.628 13.108 A2 16 0
41 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
42 IC 1805 256 Y*O 02 34 24.5600748624 +61 32 53.656221444 14.69 14.59 13.87 13.72   B8 8 0
43 Cl King 4 OpC 02 36 07.1 +59 01 52   11.42 10.5     ~ 49 0
44 ATO J039.1706+58.9640 LP* 02 36 40.9633794240 +58 57 50.638772628   14.70 13.04 12.59   ~ 3 0
45 TYC 4055-1782-1 Em* 02 40 21.0143496120 +64 30 19.928719836   11.30 10.76     ~ 1 0
46 HD 17520 ** 02 51 14.4527711976 +60 23 10.057239852 7.86 8.54 8.24 7.96 7.73 O9.2Ve+O8Vz 151 0
47 IC 1848 OpC 02 51 19.4 +60 25 32   6.87 6.5     ~ 522 2
48 NGC 1960 47 Em* 05 36 07.2042246624 +34 08 03.267208104   10.56 10.44     ~ 13 0
49 M 36 OpC 05 36 19.8 +34 08 02   6.09 6.0     ~ 206 2
50 * 30 Gem PM* 06 43 59.2871476656 +13 13 40.799645724 6.82 5.65 4.49 3.63 3.03 K0+IIICa1 156 0
51 * mu. Leo PM* 09 52 45.8170136628 +26 00 25.024269924 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 479 0
52 HD 122796 PM* 14 03 27.3082842024 +27 30 35.762071572   8.263 7.182     G5 29 0
53 V* V988 Oph AB* 18 26 52.8363330600 +03 54 49.217099256   9.45 7.93     M5/6III 27 0
54 V* V1434 Aql AB* 18 46 55.5923040792 +09 25 09.197468652   9.50 7.74     M3 18 0
55 ZTF J194307.51+232602.8 LP* 19 43 07.5156306720 +23 26 02.858487072   15.68 15.38     ~ 12 0
56 NGC 6823 OpC 19 43 11.3 +23 18 32   7.71 7.1     ~ 279 2
57 UCAC4 567-089907 Em* 19 45 07.6195577832 +23 21 39.922282008       15.32   ~ 1 0
58 UCAC4 598-100628 Em* 19 51 34.0715038296 +29 25 10.466217768       14.39   ~ 1 0
59 UCAC4 598-100722 Em* 19 51 41.9679406392 +29 27 51.507804708       12.62   ~ 3 0
60 UCAC2 42121776 ** 19 52 11.2975990632 +29 25 10.594986204       11.70   ~ 4 0
61 TYC 2152-3196-1 Em* 19 52 11.7683741352 +29 13 14.554602948   12.98 12.94     ~ 1 0
62 NGC 6834 OpC 19 52 12.2 +29 23 54   8.46 7.8     ~ 98 0
63 UCAC2 42121941 Be* 19 52 21.2139810648 +29 20 20.424758640       13.25   B5Ve 2 0
64 UCAC4 598-101426 ** 19 52 53.104872 +29 26 33.35820       14.24   ~ 3 0
65 UCAC4 598-101452 Em* 19 52 55.8980847816 +29 28 47.297839548       14.76   ~ 2 0
66 IC 4996 23 Be* 20 16 29.0778948768 +37 38 52.146900996 12.13 11.36 11.03     B3e 10 0
67 IC 4996 OpC 20 16 32.7 +37 38 46           ~ 187 0
68 UCAC4 643-093153 ** 20 19 54.961200 +38 34 23.20500   16.25 14.81 14.43   ~ 4 0
69 Cl Berkeley 86 OpC 20 20 20.6 +38 42 15           ~ 130 0
70 EM* AS 405 Em* 20 20 22.7240992848 +38 38 13.091363520   13.75 12.62     B1Ve 7 0
71 Cl Berkeley 90 OpC 20 35 15.5 +46 50 30           ~ 36 0
72 UCAC3 274-184438 Be* 20 35 41.5154917728 +46 46 49.533103380   13.78 12.85 12.28   B0Ve 8 0
73 TYC 3191-1081-1 Em* 21 34 02.7623649672 +43 00 58.633181316   11.98 11.81     ~ 1 0
74 NGC 7128 OpC 21 43 58.0 +53 43 00   10.54 9.7     ~ 82 0
75 Cl* NGC 7128 BAR L Em* 21 44 05.6019348504 +53 42 01.193801796 15.24 15.22 14.40 14.34   ~ 5 0
76 ZTF J221058.23+572327.4 LP* 22 10 58.2440968920 +57 23 27.451168260   14.60 13.63 13.43   ~ 4 0
77 2MASS J22125596+5726391 Be* 22 12 55.9782452088 +57 26 39.031632636   12.55 12.60     Be 4 0
78 2MASS J22132130+5723029 Em* 22 13 21.3141457992 +57 23 02.883380892   14.52 14.51     ~ 2 0
79 2MASS J22134090+5707456 Y*? 22 13 40.9200776608 +57 07 45.557342001   14.74 14.60     ~ 4 0
80 NAME Pismis-Moreno 1 OpC 22 18 38.4 +63 14 19           ~ 44 0
81 TYC 4268-637-1 Em* 22 19 04.1836033536 +63 18 20.606508972   12.39 11.11     ~ 1 0
82 UCAC4 741-079991 Y*? 22 19 33.9385819872 +58 06 48.459996108   15.07 14.17 14.06   ~ 5 0
83 ATO J334.9643+58.1481 Be* 22 19 51.4517536440 +58 08 53.468826072   13.80 12.68 12.61   B0Ve 11 0
84 TYC 3990-519-1 Em* 22 20 10.0065961344 +57 57 28.699361856   12.17 11.73     ~ 1 0
85 ZTF J222013.11+580742.6 Be* 22 20 13.1210215536 +58 07 42.656251800   13.58 12.82 12.51   B0-1Ve 10 0
86 NGC 7261 OpC 22 20 14.8 +58 07 22   9.20 8.4     ~ 54 0
87 ATO J336.5654+46.7314 LP* 22 26 15.6932538048 +46 43 52.956114708   15.24 14.01 12.83   ~ 3 0
88 NGC 7380 OpC 22 47 23.4 +58 06 55           ~ 198 0
89 UCAC4 741-086760 Be* 22 47 40.1198644464 +58 09 03.661770384     13.678 13.517 12.702 B1-3Ve 8 0
90 [MJD95] J224742.63+580746.6 Be* 22 47 42.6157396440 +58 07 46.719237000   13.81 13.59     B5-7Ve 3 0
91 IRAS 23004+6300 LP* 23 02 28.5204757704 +63 16 31.035392724   13.569 12.938 12.827   ~ 11 0
92 NGC 7510 OpC 23 11 03.7 +60 34 40   8.77 7.9     ~ 107 1
93 UCAC4 754-077676 Em* 23 11 26.1759014112 +60 40 22.263239748       12.53   ~ 4 0
94 M 52 OpC 23 24 47.2 +61 35 32           ~ 200 0
95 NGC 7654 946 Em* 23 24 52.0539522456 +61 31 00.868481328   12.38 12.36     ~ 5 0
96 UCAC3 306-165872 Be* 23 49 46.7823045648 +62 42 36.908745372   14.45 13.62 13.56   B5Ve 7 0
97 Cl King 21 OpC 23 49 54.2 +62 42 18           ~ 35 0
98 UCAC3 306-165960 Be* 23 49 58.9326129432 +62 46 21.517591080   13.64 12.81 12.68   B3Ve 2 0
99 UCAC4 765-075625 Em* 23 50 46.7525031144 +62 50 07.216619028   14.99 14.22 14.16   ~ 1 0

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