2001A&A...378..861C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST16:52:15

2001A&A...378..861C - Astronomy and Astrophysics, volume 378, 861-882 (2001/11-2)

High and intermediate-resolution spectroscopy of Be stars. An atlas of Hγ, HeI 4471 and MgII 4481 lines.

CHAUVILLE J., ZOREC J., BALLEREAU D., MORRELL N., CIDALE L. and GARCIA A.

Abstract (from CDS):

We present an atlas of Hγ, HeI λ 4471 and Mg II λ 4481 line profiles obtained in a 10 year observation period of 116 Be stars, which enabled many of them to be observed at quite different emission epochs. From the best fit of the observed HeI λ 4471 line profiles with non-LTE, uniform (Teff,logg) and full limb-darkened model line profiles, we determined the Vsini of the program stars. To account, to some degree, for the line formation peculiarities related to the rapid rotation-induced non-uniform distributions of temperature and gravity on the stellar surface, the fit was achieved by considering (Teff,logg) as free parameters. This method produced Vsini estimations that correlate with the rotational velocities determined by Slettebak (1982ApJS...50...55S) within a dispersion σ≤30km/s and without any systematic deviation. They can be considered as given in the new Slettebak's et al. (1975ApJS...29..137S) system. Only 13 program stars have discrepant Vsini values. In some objects, this discrepancy could be attributed to binary effects. Using the newly determined Vsini parameters, we found that the ratio of true rotational velocities V/Vc of the program Be stars has a very low dispersion around the mean value. Assuming then that all the stars are rigid rotators with the same ratio V(<ω>)/Vc, we looked for the value of <ω> that better represents the distribution of Vsini/Vc for randomly oriented rotational axes. We obtained <ω≥0.795. This value enabled us to determine the probable inclination angle of the stellar rotation axis of the program stars. In the observed line profiles of Hγ, HeI λ 4471, MgII λ 4481 and FeII λ 4351 we measured several parameters related to the absorption and/or emission components, such as: equivalent width, residual emission and/or absorption intensity, FWHM, emission peak separations, etc. The parameters related to the Hγ line emission profiles were used to investigate the structure of the nearby environment of the central star. From the characteristics of the correlations between these quantities and the inferred inclination angle, we concluded that in most of cases the Hγ line emission forming regions may not be strongly flattened. Using a simple representation of the radiation flux emitted by the star+envelope system, we derived first order estimates of physical parameters characterizing the Hγ line emission formation region. Thus, we obtained that the total extent of the Hγ region is Rf≃2.5±1.0R* and that the density distribution in these layers can be mimicked with a power law ρ∼R–α, where α=2.5+2.2–0.6. The same approach enabled us to estimate the optical depth of the Hγ line emission formation region. From its dependence with the aspect angle, we concluded that these regions are caracterized by a modest flattening and that the ρ(equator)/ρ(pole) density contrast of the circumstellar envelope near the star should be two orders of magnitude lower than predicted by models based on a priori disc-shaped circumstellar envelopes. We found that the separation between the emission peaks, Δp, and the full width at half maximum, Δ1/2, of the Hγ line emission are not only sensitive to kinematic effects, but to line optical depth as well. This finding agrees with previous theoretical predictions and confirms that Huang's (1972ApJ...171..549H) relation overestimates the extent of the Hγ line emission formation region.

Abstract Copyright:

Journal keyword(s): stars: emission-line, Be - stars: fundamental parameters - techniques: spectroscopic - line: profiles

VizieR on-line data: <Available at CDS (J/A+A/378/861): stars.dat table2.dat table3.dat table4.dat table5.dat table6.dat table7.dat tables.tex fit/*>

Simbad objects: 115

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Number of rows : 115

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * 10 Cas Be* 00 06 26.5378574380 +64 11 46.169112510 5.37 5.56 5.59     B9IIIe 103 0
2 * omi Cas Be* 00 44 43.5186650 +48 17 03.713573 3.91 4.44 4.50 4.45 4.50 B5IIIe 267 0
3 * gam Cas Be* 00 56 42.5317 +60 43 00.265 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1137 2
4 * phi And Be* 01 09 30.12562 +47 14 30.4594 3.84 4.18 4.25 4.22 4.27 B5IIIe 230 0
5 HD 9612 Be* 01 37 22.2209245299 +74 18 03.440202389 6.27 6.589 6.573     B8IV 29 0
6 * alf Eri Be* 01 37 42.84548 -57 14 12.3101 -0.36 0.30 0.46 0.49 0.60 B6Vpe 445 0
7 * phi Per Be* 01 43 39.6379209 +50 41 19.432832 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 530 0
8 HD 11606 Be* 01 55 42.8536085670 +59 16 24.420680595 6.22 7.08 7.02     B2Vne 77 0
9 HD 18552 Be* 03 00 11.8861321435 +38 07 54.200034089 5.67 6.05 6.11     B7IVe 81 0
10 HD 19243 Be* 03 08 54.1780106560 +62 23 04.529427265 7.778 6.719 6.498     B1V:e 90 0
11 HD 20336 Be* 03 19 59.2722182726 +65 39 08.251851271 3.93 4.70 4.85 4.88 5.01 B2.5Vn(e) 207 0
12 * psi Per Be* 03 36 29.3798227 +48 11 33.478941 3.60 4.17 4.23     B5Ve 396 0
13 HD 22780 Be* 03 41 07.8568858723 +37 34 48.728888670 5.09 5.50 5.57     B7Vn 88 0
14 * 13 Tau Be* 03 42 18.9478060134 +19 42 00.925169042 5.41 5.68 5.69     B9Vne 91 0
15 * 17 Tau Be* 03 44 52.5368818 +24 06 48.011217 3.19 3.59 3.70 3.71 3.80 B6IIIe 374 1
16 * 23 Tau Be* 03 46 19.5738428 +23 56 54.081244 3.70 4.12 4.18   4.16 B6IV(e) 412 2
17 * eta Tau Be* 03 47 29.0765529 +24 06 18.488347 2.44 2.78 2.87 2.84 2.88 B7III 512 1
18 HD 23552 Be* 03 48 18.0744583437 +50 44 12.355029498 5.88 6.20 6.14     B8V 79 1
19 * 28 Tau Be* 03 49 11.2175463444 +24 08 12.172181348 4.73 5.01 5.09   5.08 B8Vne 434 0
20 V* X Per HXB 03 55 23.0778791365 +31 02 45.045745259 6.090 6.840 6.720     O9.5III 903 0
21 * c Per Be* 04 08 39.6921578 +47 42 45.042937 3.45 4.00 4.03 3.91 3.93 B3Ve 365 0
22 * 228 Eri Be* 04 29 06.9257908165 -13 02 54.131950447 4.45 5.23 5.41 5.46 5.63 B2(V)ne 267 0
23 * 56 Eri Be* 04 44 05.3208488091 -08 30 12.847764696 4.97 5.75 5.81 5.72 5.74 B2(V)nne 173 0
24 * 11 Cam Be* 05 06 08.4523644964 +58 58 20.548606420 4.31 5.00 5.08     B3Ve 201 0
25 * lam Eri Be* 05 09 08.7831482 -08 45 14.690823 3.17 4.07 4.27 4.35 4.55 B2III(e)p 283 1
26 * eta Ori Al* 05 24 28.61672 -02 23 49.7311 2.25 3.18 3.35 3.44 3.65 B1V+B2: 379 0
27 * psi01 Ori Be* 05 24 44.8269466961 +01 50 47.202396831 3.83 4.76 4.96 5.04 5.26 B1Vn 322 0
28 * 120 Tau Be* 05 33 31.6300068628 +18 32 24.830592843 4.94 5.70 5.69     B2IV-Ve 138 0
29 * zet Tau Be* 05 37 38.6854231 +21 08 33.158804 2.22 2.84 3.03 3.06 3.15 B1IVe_shell 695 0
30 * ome Ori Be* 05 39 11.1463172 +04 07 17.279475 3.73 4.48 4.59 4.57 4.67 B3Ve 388 1
31 * alf Col Be* 05 39 38.9410319 -34 04 26.794991 2.10 2.53 2.65 2.65 2.74 B9Ve 225 0
32 HD 41335 Be* 06 04 13.5022124890 -06 42 32.225555101 4.31 5.14 5.21 5.13 5.09 B3/5Vnne 272 0
33 HD 44458 Be* 06 21 24.7160978834 -11 46 23.657723467 4.74 5.56 5.55 5.38 5.34 B1.5IVe 146 1
34 * bet Mon A Be* 06 28 49.0688084600 -07 01 59.016107399 3.87 4.50 4.60     B4Veshell 240 0
35 * bet Mon ** 06 28 49.06971 -07 01 59.0101 2.85 3.59 3.74 3.75 3.91 B4Ve+B2Vn(e)+B3V:nne 219 0
36 HD 45995 Be* 06 31 09.5620873293 +11 15 04.958757782 5.20 6.06 6.14     B1.5Vne 142 0
37 HD 47054 Be* 06 36 35.3296957645 -05 12 40.100498706 5.05 5.44 5.52     B8IVe 92 0
38 * 10 CMa Be* 06 44 28.4678934368 -31 04 13.882146649 4.18 5.08 5.17 5.15 5.17 B2V 135 0
39 * kap CMa Be* 06 49 50.4593263 -32 30 30.522482 2.73 3.68 3.89 3.91 4.05 B1.5Ve 270 0
40 HD 54309 Be* 07 07 22.5872825901 -23 50 26.574480619 4.83 5.68 5.83 5.83 5.95 B3Vne 125 0
41 * 27 CMa Be* 07 14 15.2119175 -26 21 09.031206 3.76 4.45 4.65 4.64 4.73 B4Ve_sh 220 0
42 * ome CMa Be* 07 14 48.6538664 -26 46 21.609714 2.90 3.64 3.82 3.80 3.90 B2.5Ve 329 0
43 * ups02 Pup Be* 07 18 38.1863207637 -36 44 33.855733543 4.28 4.95 5.11 5.17 5.38 B3Vne 104 1
44 HD 58050 Be* 07 24 27.6487089696 +15 31 01.916787310 5.39 6.23 6.41     B2Ve 117 0
45 HD 58343 Be* 07 24 40.1874154193 -16 12 05.299273325 4.52 5.15 5.19 5.05 5.06 B2Vne 201 0
46 HD 58978 Be* 07 26 59.4826767357 -23 05 09.683936209 4.51 5.45 5.56 7.05   B0.5IVe 211 0
47 * z Pup Be* 07 33 51.0420559079 -36 20 18.207070870 4.67 5.37 5.44 5.33 5.32 B2Vne 118 0
48 * omi Pup Be* 07 48 05.1683937 -25 56 13.812276 3.42 4.43 4.49 4.37 4.37 B1IVe 197 0
49 HD 66194 Be* 07 58 50.5509056292 -60 49 28.055349036 4.92 5.72 5.81 5.77 5.83 B3Vn 120 0
50 * r Pup Be* 08 13 29.5171968 -35 53 58.266226 3.68 4.66 4.77 4.68 4.77 B2ne 175 0
51 * f Car Be* 08 46 42.5492831 -56 46 11.192208 3.58 4.31 4.49 4.59 4.78 B3V(n) 134 0
52 HD 77320 Be* 09 00 22.2554251602 -43 10 26.375272118 5.16 5.93 6.08 6.07 6.19 B2Vnn(e) 82 1
53 * I Hya Be* 09 41 17.0073191 -23 35 29.453418 4.07 4.65 4.76 4.75 4.84 B5V 160 0
54 HD 86612 Be* 09 59 06.3039004330 -23 57 02.770373603 5.51 6.13 6.25 6.14 6.19 B5Ve 89 0
55 HD 88661 Be* 10 11 46.4588844420 -58 03 37.956100045 4.77 5.66 5.75 5.66 5.70 B5Vne 137 0
56 * ome Car Be* 10 13 44.2173938 -70 02 16.456305 2.92 3.25 3.33 3.29 3.32 B8IIIe 110 0
57 HD 91120 Be* 10 30 59.8371633549 -13 35 18.495396994 5.38 5.54 5.58     B8/9IV/V 98 0
58 * p Car Be* 10 32 01.4629679 -61 41 07.196308 2.46 3.18 3.27 3.22 3.28 B4Vne 221 0
59 * del Cen Be* 12 08 21.4976373 -50 43 20.738614 1.51 2.39 2.52 2.48 2.62 B2Vne 293 0
60 HD 105521 Be* 12 08 54.5889247811 -41 13 53.770778181 4.87 5.402 5.498     B3IVe 74 0
61 * kap Dra Be* 12 33 28.9420577565 +69 47 17.633094524 3.18 3.75 3.89 3.84 3.92 B6IIIe 353 0
62 HD 110432 Be* 12 42 50.2655719413 -63 03 31.048323668 4.79 5.58 5.31     B0.5IVpe 269 0
63 * mu.02 Cru Be* 12 54 36.8837228156 -57 10 07.196143361 4.59 5.09 5.20 5.00 5.06 B5Vne 157 0
64 * lam Cru Be* 12 54 39.1825757 -59 08 48.122859 3.86 4.451 4.602     B3Vne 130 1
65 HD 113120 Be* 13 03 05.33940 -71 28 32.6285 5.21 6.08 6.03 7.40   B2IVne 112 0
66 * mu. Cen Be* 13 49 36.9886294 -42 28 25.429594 2.37 3.27 3.43 3.41 3.50 B2Vnpe 411 0
67 HD 124367 Be* 14 14 57.1404303053 -57 05 10.058117811 4.36 4.99 5.07     B4Vne 132 0
68 * eta Cen Be* 14 35 30.4241610 -42 09 28.170782 1.30 2.12 2.31 2.41 2.59 B2Ve 322 0
69 * tet Cir Be* 14 56 43.9873836 -62 46 51.657921 4.34 5.11 5.11 4.87 4.79 B2IV/V 101 0
70 * kap Lup Be* 15 11 56.0760514972 -48 44 16.127509644 3.55 3.67 3.70 3.75 3.76 B9.5Vne 88 0
71 * mu. Lup Be* 15 18 32.02296 -47 52 30.9957 3.82         B8Ve 95 0
72 * kap01 Aps Be* 15 31 30.8205174186 -73 23 22.534139337 4.60 5.37 5.49     B2Vnpe 103 0
73 HD 142184 Be* 15 53 55.86404 -23 58 41.1522 4.77 5.352 5.402     B2V 200 0
74 * 48 Lib Be* 15 58 11.3686950 -14 16 45.689426 4.61 4.77 4.87 4.91 4.96 B5IIIp_sh 425 0
75 * chi Oph Be* 16 27 01.4349892 -18 27 22.493784 3.95 4.71 4.43 3.97 3.73 B2Vne 564 0
76 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1726 2
77 * iot Ara Be* 17 23 16.0749238495 -47 28 05.514575023 4.32 5.14 5.25 5.12 5.20 B2(V)nne 135 0
78 * c Oph Be* 17 31 24.9541340 -23 57 45.513592 4.75 4.81 4.81 4.74 4.72 A0V 254 0
79 * alf Ara Be* 17 31 50.4915282 -49 52 34.122041 2.09 2.78 2.95 3.05 3.29 B2Vne 245 0
80 * 66 Oph Be* 18 00 15.7982457 +04 22 07.016285 3.77 4.58 4.60 4.47 4.49 B2Ve 326 0
81 HD 167128 Be* 18 17 07.5317926356 -56 01 24.087624857 4.62 5.30 5.36 5.32 5.36 B3II/III 85 0
82 HD 174237 Be* 18 46 43.0889592280 +52 59 16.650319177 5.06 5.80 5.90     B3+F5III 190 0
83 * lam Pav Be* 18 52 13.0342656 -62 11 15.332363 3.19 4.048 4.207     B2Ve 141 0
84 * 64 Ser Be* 18 57 16.5896724356 +02 32 07.250994190 5.29 5.545 5.551     B8/9II 102 0
85 HD 178175 Be* 19 08 16.7015956315 -19 17 25.039278668 4.79 5.43 5.49 5.50 5.51 B2Ve 136 0
86 HD 183656 Be* 19 30 33.1219944607 +03 26 39.858289092 5.69 6.064 6.082     B7III 120 0
87 * bet02 Cyg Be* 19 30 45.3960872028 +27 57 54.973848075 4.69 5.01 5.11     B8Ve 155 0
88 HD 184279 Be* 19 33 36.9169525187 +03 45 40.794859723 6.63 6.98 6.98     B0V 137 0
89 * 11 Cyg Be* 19 35 48.3042461762 +36 56 40.342023481 5.42 5.939 6.034     B8Vne 72 0
90 * 12 Vul Be* 19 51 04.1087903864 +22 36 36.165889039 4.15 4.84 4.96 4.98 5.12 B2.5Ve 175 0
91 * 25 Cyg Be* 19 59 55.1955299208 +37 02 34.394909755 4.33 5.02 5.19     B3IVe 144 1
92 * b02 Cyg Be* 20 09 25.6190867940 +36 50 22.596147551 4.03 4.80 4.93     B2.5Ve 246 0
93 * 20 Vul Be* 20 12 00.7017606281 +26 28 43.698928217 5.38 5.81 5.92     B7Ve 103 0
94 * 25 Vul Be* 20 22 03.4307625256 +24 26 45.952640844 5.06 5.45 5.56 5.59 5.58 B6IVe 98 0
95 * lam Cyg ** 20 47 24.53766 +36 29 26.5737 3.93 4.43 4.54 4.58 4.69 B5V 294 0
96 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 465 0
97 HD 201733 Be* 21 09 58.6314769304 +45 30 09.192113288 5.81 6.47 6.63     B4IVp 84 0
98 * ups Cyg Be* 21 17 55.0870156081 +34 53 48.769974820 3.50 4.32 4.42 4.37 4.45 B2Vne 300 0
99 * 6 Cep Be* 21 19 22.2202464 +64 52 18.682115 4.56 5.14 5.18     B3IVe 152 0
100 HD 204860 Be* 21 30 00.8934387116 +45 29 39.059590353   6.905 6.951     Be 27 0
101 * eps Cap Be* 21 37 04.8306787 -19 27 57.646354 3.69 4.35 4.55 4.60 4.74 B3V 239 0
102 * 16 Peg Be* 21 53 03.7682618 +25 55 30.490138 4.24 4.921 5.081     B3Ve 159 0
103 HD 208682 Be* 21 55 30.99976 +65 19 14.9142 5.05 5.80 5.86     B2Ve 120 1
104 * eta PsA Be* 22 00 50.22537 -28 27 13.4639 4.96         B8III_sh+B8.5IV 91 0
105 * omi Aqr Be* 22 03 18.8440292 -02 09 19.306758 4.22 4.64 4.69 4.70 4.74 B7IVe 253 0
106 HD 209522 Be* 22 04 36.7670935746 -26 49 20.492720775 5.16 5.793 5.953     B4IVe 86 0
107 * 25 Peg Be* 22 07 50.3036328703 +21 42 10.530347500 5.27 5.68 5.78     B7Vne 109 0
108 * 31 Peg Be* 22 21 31.0751048 +12 12 18.662815 4.08 4.89 4.99 5.06 5.20 B2IV-Ve 210 0
109 * pi. Aqr Be* 22 25 16.6228499 +01 22 38.634579 3.64 4.60 4.64 4.48 4.48 B1III-IVe 384 0
110 * 8 Lac B * 22 35 52.0983894362 +39 37 41.331148560 4.61 5.52 5.67 5.88 6.06 B1.5Vs 104 0
111 * eps PsA Be* 22 40 39.3446800341 -27 02 36.967874856 3.69 4.071 4.177     B8Ve 141 0
112 HD 217050 Be* 22 57 04.5017623555 +48 41 02.641244743 4.81 5.34 5.43     B4IIIpe 316 1
113 * bet Psc Be* 23 03 52.6134921 +03 49 12.166213 3.90 4.40 4.52 4.54 4.67 B6Ve 236 0
114 HD 224559 Be* 23 58 46.4391020038 +46 24 47.442722137 5.84 6.444 6.538     B4Vne 127 1
115 HD 224544 Be* 23 58 49.2358752349 +32 22 54.139968985 5.84 6.395 6.515     B6IVe 62 0

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2020.07.16-16:52:15

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