2011AJ....141..150J

Query : 2011AJ....141..150J

2011AJ....141..150J - Astron. J., 141, 150 (2011/May-0)

The variability of Hα equivalent widths in Be stars.

JONES C.E., TYCNER C. and SMITH A.D.

Abstract (from CDS):

Focusing on B-emission stars, we investigated a set of Hα equivalent widths (EWs) calculated from observed spectra acquired over a period of about four years from 2003 to 2007. During this time, changes in EW for our program stars were monitored. We have found a simple statistical method to quantify these changes in our observations. This statistical test, commonly called the F ratio, involves calculating the ratio of the external and internal error. We show that the application of this technique can be used to place bounds on the degree of variability of Be stars. This observational tool provides a quantitative way to find Be stars at particular stages of variability requiring relatively little observational data.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: emission-line, Be - stars: variables: general

Simbad objects: 58

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Number of rows : 58
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 * omi Cas Be* 00 44 43.5186007265 +48 17 03.731037403 3.91 4.44 4.50 4.45 4.50 B5IIIe 291 0
2 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1253 0
3 * phi And Be* 01 09 30.12562 +47 14 30.4594 3.84 4.18 4.25 4.22 4.27 B5IIIe 244 0
4 * phi Per Be* 01 43 39.6379691568 +50 41 19.433124998 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 594 0
5 HD 11606 Be* 01 55 42.8535736272 +59 16 24.421983852 6.22 7.08 7.02     B2Vne 90 0
6 * bet Per SB* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1265 1
7 HD 19243 Be* 03 08 54.1761981696 +62 23 04.549808184 7.778 6.719 6.498     B1V:e 102 0
8 HD 20336 Be* 03 19 59.2693390128 +65 39 08.285606820 3.93 4.70 4.85 4.88 5.01 B2.5Vn(e) 226 0
9 * psi Per Be* 03 36 29.3797327450 +48 11 33.484405927 3.60 4.17 4.23     B5Ve 431 0
10 * 17 Tau Be* 03 44 52.5370897890 +24 06 48.016260072 3.19 3.59 3.70 3.71 3.80 B6IIIe 415 1
11 * 23 Tau Be* 03 46 19.5858871361 +23 56 54.092177220 3.70 4.12 4.18   4.16 B6IV(e) 446 2
12 * eta Tau Be* 03 47 29.0765529 +24 06 18.488347 2.44 2.78 2.87 2.84 2.88 B7III 557 1
13 * 28 Tau Be* 03 49 11.2165977912 +24 08 12.156712008 4.73 5.01 5.09   5.08 B8Vne 494 0
14 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 1037 0
15 * lam Per * 04 06 35.0425894267 +50 21 04.541423730 4.27 4.31 4.29 4.21 4.19 A0IVn 116 0
16 * c Per Be* 04 08 39.6935695869 +47 42 45.038007366 3.45 4.00 4.03 3.91 3.93 B3Ve 394 0
17 * 56 Eri Be* 04 44 05.3207274312 -08 30 12.852684720 4.97 5.75 5.81 5.72 5.74 B2(V)nne 186 0
18 * eps Aur SB* 05 01 58.1343686760 +43 49 23.917115316 3.86 3.53 2.99 2.47 2.02 A9Ia 600 0
19 * 11 Cam Be* 05 06 08.4527318736 +58 58 20.543222820 4.31 5.00 5.08     B3Ve 221 0
20 * 105 Tau Be* 05 07 55.4349577176 +21 42 17.349368184 5.51 6.08 5.92     B2Ve 184 0
21 * psi01 Ori Be* 05 24 44.8273848312 +01 50 47.201915688 3.83 4.76 4.96 5.04 5.26 B1Vn 372 0
22 * zet Tau Be* 05 37 38.6854231 +21 08 33.158804 2.22 2.84 3.03 3.06 3.15 B1IVe_shell 751 0
23 * ome Ori Be* 05 39 11.1457980782 +04 07 17.288290296 3.73 4.48 4.59 4.57 4.67 B3Ve 424 1
24 * 17 Lep Sy* 06 04 59.1294521328 -16 29 03.969238632 5.29 5.17 4.93     A3+K/M 224 0
25 * nu. Gem Be* 06 28 57.7861342 +20 12 43.685624 3.51 4.00 4.14 4.17 4.28 B6IVe 269 0
26 * kap CMa Be* 06 49 50.4591124672 -32 30 30.523820933 2.73 3.68 3.89 3.91 4.05 B1.5Ve 298 0
27 * ome CMa Be* 07 14 48.6540133346 -26 46 21.603204215 2.90 3.64 3.82 3.80 3.90 B2.5Ve 373 0
28 * bet CMi Be* 07 27 09.0417373 +08 17 21.536745 2.52 2.80 2.89 2.90 2.96 B8Ve 400 0
29 * omi Pup Be* 07 48 05.1686329933 -25 56 13.810593657 3.42 4.43 4.49 4.37 4.37 B1IVe 228 0
30 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 891 1
31 * zet Crv Be* 12 20 33.6419830656 -22 12 57.241705320 4.73 5.11 5.21     B8V 86 0
32 * kap Dra Be* 12 33 28.9433168544 +69 47 17.659892220 3.18 3.75 3.89 3.84 3.92 B6IIIe 395 0
33 HD 141569 Or* 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 578 0
34 * 4 Her Be* 15 55 30.5919435384 +42 33 58.291421364 5.23 5.64 5.75   5.82 B9pe 184 0
35 * 48 Lib Be* 15 58 11.3682502453 -14 16 45.681109093 4.61 4.77 4.87 4.91 4.96 B5IIIp_sh 446 0
36 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 776 0
37 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 624 0
38 HD 155806 Be* 17 15 19.2478670712 -33 32 54.299379012 4.61 5.52 5.53     O7.5V((f))z(e) 240 0
39 * c Oph Be* 17 31 24.9538710166 -23 57 45.514802684 4.75 4.81 4.81 4.74 4.72 A0V 284 0
40 * 66 Oph Be* 18 00 15.7957050537 +04 22 07.122326765 3.77 4.58 4.60 4.47 4.49 B2Ve 358 0
41 * omi Her Be* 18 07 32.5511122149 +28 45 44.967836300 3.74 3.802 3.827     B9.5III 162 0
42 * 4 Aql Be* 18 44 49.9384627890 +02 03 36.140445685   4.948 5.005     B9IIIe 104 0
43 * bet Lyr SB* 18 50 04.7951442356 +33 21 45.600371200 2.85 3.42 3.42 3.31 3.29 B8.5Ib-II 955 0
44 HD 179218 Ae* 19 11 11.2538919456 +15 47 15.636008472 7.55 7.476 7.39 7.25 7.21 A0Ve 273 0
45 * b02 Cyg Be* 20 09 25.6190611128 +36 50 22.633958400 4.03 4.80 4.93     B2.5Ve 281 0
46 HD 192685 ** 20 15 15.8960557510 +25 35 31.062881681   4.58 4.75     B3V 149 0
47 * P Cyg s*b 20 17 47.2019733389 +38 01 58.549132671 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1200 1
48 * 1 Del ** 20 30 17.96064 +10 53 45.3233 5.94 6.05 6.08     A1:III 109 0
49 * lam Cyg ** 20 47 24.53766 +36 29 26.5737 3.93 4.43 4.54 4.58 4.69 B5V 312 0
50 * f01 Cyg Be* 20 59 49.5541247496 +47 31 15.363746436 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 514 0
51 * 60 Cyg Be* 21 01 10.9277453472 +46 09 20.795190696 4.23 5.226 5.432     B1Ve 217 0
52 * ups Cyg Be* 21 17 55.0858548408 +34 53 48.825463560 3.50 4.32 4.42 4.37 4.45 B2Vne 321 0
53 * eps Cap Be* 21 37 04.8311169408 -19 27 57.640399810 3.69 4.35 4.55 4.60 4.74 B3V 266 0
54 HD 206773 Be* 21 42 24.1853979312 +57 44 09.795762276 6.30 7.10 6.87     B0V:pe 178 0
55 * omi Aqr Be* 22 03 18.8440617830 -02 09 19.313835540 4.22 4.64 4.69 4.70 4.74 B5V 279 0
56 * 31 Peg Be* 22 21 31.0751048 +12 12 18.662815 4.08 4.89 4.99 5.06 5.20 B3III 227 0
57 * pi. Aqr Be* 22 25 16.6230017410 +01 22 38.634449478 3.64 4.60 4.64 4.48 4.48 B1III-IVe 436 0
58 * bet Psc Be* 23 03 52.6132153632 +03 49 12.164302217 3.90 4.40 4.52 4.54 4.67 B6Ve 259 0

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