2006A&A...456.1045B


Query : 2006A&A...456.1045B

2006A&A...456.1045B - Astronomy and Astrophysics, volume 456, 1045-1068 (2006/9-4)

Modeling of PMS Ae/Fe stars using UV spectra.

BLONDEL P.F.C. and TJIN A DJIE H.R.E.

Abstract (from CDS):

Spectral classification of HAeFe stars, based on visual observations, may lead to ambiguous conclusions. We aim to reduce these ambiguities by using UV spectra for the classification of these stars, because the rise of the continuum in the UV is highly sensitive to the stellar spectral type of A/F-type stars. We analyse the low-resolution UV spectra in terms of a 3-component model, that consists of spectra of a central star, of an optically-thick accretion disc, and of a boundary-layer between the disc and star. The disc-component was calculated as a juxtaposition of Planck spectra, while the 2 other components were simulated by the low-resolution UV spectra of well-classified standard stars (taken from the IUE spectral atlases). The hot boundary-layer shows strong similarities to the spectra of late-B type supergiants (see Appendix A). We modeled the low-resolution UV spectra of 37 HAeFe stars. Each spectral match provides 8 model parameters: spectral type and luminosity-class of photosphere and boundary-layer, temperature and width of the boundary-layer, disc-inclination and circumstellar extinction. From the results of these analyses, combined with available theoretical PMS evolutionary tracks, we could estimate their masses and ages and derive their mass-accretion rates. For a number of analysed PMS stars we calculated the corresponding SEDs and compared these with the observed SEDs. All stars (except BPC) show indications of accretion, that affect the resulting spectral type of the stellar photosphere. Formerly this led to ambiguities in classificaton of PMS stars as the boundary-layer was not taken into consideration. We give evidence for an increase of the mass-accretion rate with stellar mass and for a decreases of this rate with stellar age.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - accretion, accretion disks

CDS comments: Appendix C Associations Ori T4,Tau T4 and Aur T1 not in Simbad.

Simbad objects: 157

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Number of rows : 157
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 232121 EB* 00 10 42.0679172568 +54 53 29.361482988   9.67 8.97     B5+K3III 177 0
2 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 576 0
3 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 509 0
4 * mu. And PM* 00 56 45.2090751570 +38 29 57.603377713 4.14 3.99 3.87 3.72 3.64 A6V 213 0
5 V* U Cep EB* 01 02 18.4439850768 +81 52 32.081564352   6.92 6.92     G2III:+B8/9 464 0
6 HD 10307 SB* 01 41 47.1268541099 +42 36 48.221567818 5.69 5.58 4.96 4.43 4.10 G1V 485 0
7 * 107 Psc PM* 01 42 29.7625251280 +20 16 06.645657710 6.57 6.08 5.24 4.55 4.12 K1V 528 0
8 * alf Hyi PM* 01 58 46.1946699 -61 34 11.494778 3.33 3.13 2.84 2.55 2.39 F0IV 209 0
9 * 53 Cas * 02 03 00.1876117560 +64 23 24.064866924 5.69 5.930 5.614     A0Ib 109 0
10 V* RZ Cas EB* 02 48 55.5102370536 +69 38 03.441502644   6.40 6.26     A3V 447 0
11 * 16 Per dS* 02 50 35.0597875 +38 19 07.108023   4.57   4.0   F2III 119 0
12 HD 20346 * 03 17 45.7545100344 +39 17 00.141698796   6.005 5.967     A2IV 46 0
13 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 853 0
14 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 820 1
15 HD 21071 Pu* 03 25 57.3820460520 +49 07 14.729885580 5.53 6.02 6.09     B7V 158 0
16 HD 21291 s*b 03 29 04.1328896160 +59 56 25.201164588 4.40 4.63 4.22 3.84 3.46 B9Ia 285 0
17 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1818 1
18 * del Per Be* 03 42 55.5042561 +47 47 15.174633 2.38 2.89 3.01 2.99 3.10 B5III 312 0
19 * 17 Tau Be* 03 44 52.5368818 +24 06 48.011217 3.19 3.59 3.70 3.71 3.80 B6IIIe 390 1
20 * 18 Tau PM* 03 45 09.7401340368 +24 50 21.343198416 5.21 5.57 5.64 5.61 5.68 B8V 266 0
21 * eta Tau Be* 03 47 29.0765529 +24 06 18.488347 2.44 2.78 2.87 2.84 2.88 B7III 524 1
22 * 27 Tau SB* 03 49 09.7425852 +24 03 12.300277 3.18 3.54 3.63 3.62 3.68 B8III 375 0
23 HD 275874 * 03 49 28.2430797096 +39 07 05.815100352 12.5 10.18 9.77     A4 5 0
24 V* XY Per Ae* 03 49 36.3365862552 +38 58 55.548299928 12.12 10.14 9.58 9.54 8.40 A2II+B6 146 0
25 LDN 1449 DNe 03 53.3 +37 39           ~ 16 0
26 * 45 Tau PM* 04 11 20.2822395072 +05 31 22.987999632   6.057 5.699 5.487 5.284 F4V 234 0
27 * 51 Tau SB* 04 18 23.2109961408 +21 34 45.188971896   5.945 5.631     F0V 256 0
28 HD 27524 PM* 04 21 31.6490057568 +21 02 23.557097868   7.215 6.779 6.531 6.283 F5V 164 0
29 V* RY Tau Or* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 675 1
30 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 276 0
31 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 431 0
32 HD 28527 dS* 04 30 33.6326139192 +16 11 38.449696416   4.975 4.764 6.52   A6IV 190 0
33 * rho Tau dS* 04 33 50.9178322656 +14 50 39.941657592 4.98 4.90 4.65 4.41 4.29 A8V 215 0
34 NAME Per B AGN 04 37 04.37510272 +29 40 13.8184969   21.7       ~ 497 2
35 HD 283817 Or* 04 40 32.6389055304 +24 26 31.329782988   11.49 10.61     K2e+A 37 0
36 HD 29646 * 04 41 19.7614386744 +28 36 53.958282516   5.736 5.729     A2V 68 0
37 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1000 2
38 V* SU Aur Or* 04 55 59.3866872552 +30 34 01.499608092   10.33 9.30 9.17   G2IIIne 568 0
39 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 464 0
40 V* UX Ori Ae* 05 04 29.9878898040 -03 47 14.286732072 10.25 10.93 8.70 9.62 9.43 A4IVe 352 1
41 LDN 1616 DNe 05 07 00 -03 21.1           ~ 31 0
42 HD 287841 Y*O 05 24 42.8032369656 +01 43 48.249234516 10.55 10.45 10.17 9.99 9.80 A8V 98 0
43 V* CO Ori Or* 05 27 38.3386648 +11 25 38.974625 12.96 12.33 10.30 10.33 9.63 F7Ve 162 0
44 HD 35929 dS* 05 27 42.7906489200 -08 19 38.446702140   8.55 8.11     F2IV/V 100 0
45 HD 36112 Ae* 05 30 27.5285630040 +25 19 57.076288752   8.57 8.27     A8Ve 420 0
46 V* HK Ori Ae* 05 31 28.049808 +12 09 10.30212 11.82 12.235 11.716 11.632 10.56 A2?e+G0?e 186 1
47 * alf Lep V* 05 32 43.8161188 -17 49 20.241380 3.02 2.77 2.57 2.35 2.14 F0Ib 274 0
48 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 286 0
49 HD 245185 Ae* 05 35 09.6034684104 +10 01 51.465413208 10.05 10.07 9.93     A0Vae 116 0
50 M 42 HII 05 35 17.3 -05 23 28           ~ 3935 0
51 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 132 1
52 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 59 0
53 V* NV Ori Ae* 05 35 31.3686116448 -05 33 08.872027056 10.36 10.21 8.70 9.48 9.22 F6IIIe 97 0
54 V* T Ori Ae* 05 35 50.4482802768 -05 28 34.925254536 12.724 11.637 11.248 10.09 10.043 A3IVeb 243 0
55 V* CQ Tau Ae* 05 35 58.4666264136 +24 44 54.091450572 11.290 10.780 10.000   8.33 F5IVe 283 0
56 NGC 1999 RNe 05 36 25 -06 42.7   9.5       ~ 101 0
57 BD-06 1253 Ae* 05 36 25.4320468080 -06 42 57.684730284   11.65 10.9 10.29   A1e 423 1
58 V* BN Ori Ae* 05 36 29.3484433464 +06 50 02.169401568   10.04 8.80 9.59   F4e 64 0
59 V* BF Ori Ae* 05 37 13.2623828280 -06 35 00.568242528 10.37 10.00 9.69 10.06 9.31 A7III 280 0
60 NAME Ori A MoC 05 38 -07.1           ~ 2868 0
61 V* RR Tau Ae* 05 39 30.5115918672 +26 22 26.967444996 11.64 12.09 11.28 10.58 10.17 A0:IVe 222 0
62 V* V350 Ori Y*O 05 40 11.7638894112 -09 42 11.086012692 12.74 12.08 11.42 11.38 10.96 A7V 73 0
63 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 697 1
64 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1286 0
65 V* V351 Ori Ae* 05 44 18.7949456328 +00 08 40.410217104 9.44 9.22 8.87     A7V 108 0
66 V* FU Ori Or* 05 45 22.3647842544 +09 04 12.291320064   10.72 9.60     F0Iab 767 1
67 LDN 1630 DNe 05 45.5 -00 59           ~ 371 0
68 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1796 1
69 * eta Lep PM* 05 56 24.2934904501 -14 10 03.718335613 4.05 4.05 3.72 3.39 3.23 F2V 329 0
70 HD 250550 Ae* 06 01 59.9892055464 +16 30 56.727549864   9.60 9.593 9.64   B9e 239 1
71 * 12 Lyn ** 06 46 14.13019 +59 26 30.0227       6.11   A2.5V 101 0
72 V* Z CMa Ae* 07 03 43.1599411656 -11 33 06.209065836 10.51 9.99 8.80     B5/8eq+F5/7 555 3
73 NAME CMa R1 As* 07 08 21.3 -11 04 50           ~ 81 1
74 CD-44 3318 Ae* 07 19 28.2886716751 -44 35 11.235575735   10.47 9.99     A1e/F2IIIe 120 0
75 * eta CMa s*b 07 24 05.70228 -29 18 11.1798 1.65 2.37 2.45 2.38 2.44 B5Ia 359 0
76 HD 59612 * 07 29 51.4122982920 -23 01 27.444741492 5.27 5.10 4.86 4.58 4.38 A5/7Iab/II 123 1
77 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1079 1
78 * b Vel V* 08 40 37.5701711 -46 38 55.476997 4.86 4.52 3.81 3.16 2.62 F0Ia 131 0
79 * iot UMa A SB* 08 59 12.4531549177 +48 02 30.562298470   3.36 3.13     A7V(n) 253 0
80 * iot UMa ** 08 59 12.45362 +48 02 30.5741 3.40 3.33 3.14 2.92 2.85 A6 290 0
81 * tau UMa SB* 09 10 55.0419835680 +63 30 49.216366332   5.008 4.640     F6IIIn 224 1
82 * tet UMa PM* 09 32 51.4338939 +51 40 38.281102 3.67 3.64 3.18 2.74 2.47 F7V 399 0
83 * kap Hya V* 09 40 18.3649593 -14 19 56.267439   4.909 5.052     B3/5IV/V 159 0
84 * ups Car * 09 47 06.12170 -65 04 19.2267   3.25 2.99 4.92   A9 66 0
85 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 428 0
86 * phi Vel * 09 56 51.7416742 -54 34 04.039043 2.81 3.35 3.45 3.51 3.59 B5Ib 124 0
87 * eta Leo * 10 07 19.9518606 +16 45 45.580270 3.17 3.39 3.41 3.32 3.35 A0Ib 329 0
88 * 21 LMi dS* 10 07 25.7629578 +35 14 40.896470 4.74 4.67 4.49 4.31 4.24 A7V(n) 220 0
89 * zet Leo V* 10 16 41.4159679 +23 25 02.322080 3.89 3.72 3.41 3.09 2.91 F0IIIa 221 0
90 * bet Sex a2* 10 30 17.4802898904 -00 38 13.314537996 4.43 4.96 5.10 5.13 5.27 B5IV/V 184 0
91 V* RZ Cha EB* 10 42 24.1088348064 -82 02 14.183233152   8.54 8.09     F3/5V 103 0
92 HD 95881 Em* 11 01 57.6218887080 -71 30 48.316074624   8.37 8.23     A0 94 0
93 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 504 0
94 HD 97240 Em* 11 09 18.1478666304 -77 47 39.915579372   8.91 8.50     F5V 37 0
95 HD 98922 Be* 11 22 31.6743077592 -53 22 11.457008148   6.80 6.76     B9Ve 125 1
96 * iot Leo SB* 11 23 55.45273 +10 31 46.2195   4.35   3.8   F3V 269 0
97 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 729 1
98 * bet Vir PM* 11 50 41.7185158616 +01 45 53.001539131 4.26 4.15 3.60 3.13 2.85 F9V 895 0
99 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0Ve+K2V 387 0
100 * eps Cha ** 11 59 37.57634 -78 13 18.6179           B9V(n) 98 0
101 V* DX Cha Ae* 12 00 05.0868602544 -78 11 34.565724312   6.81 6.60     A0_sh 323 0
102 * del Crv PM* 12 29 51.8551642 -16 30 55.552542 2.80 2.89 2.94 2.99 3.03 A0IV(n)kB9 196 0
103 HD 111775 * 12 52 05.4335107656 -48 05 39.401348892   6.328 6.304     A0V 36 0
104 * g UMa ** 13 25 13.5378333 +54 59 16.654781 4.260 4.180 4.010 3.85 3.78 A5V+M3-4V 300 0
105 * tau Vir * 14 01 38.7934143 +01 32 40.314540   4.331 4.237   4.11 A2IV/V 139 0
106 * gam UMi dS* 15 20 43.7160391 +71 50 02.459561   3.067 3.002     A2III 145 0
107 * iot Dra V* 15 24 55.7746265 +58 57 57.834445 5.68 4.45 3.29 2.51 1.91 K2III 391 1
108 HD 139614 Ae? 15 40 46.3820275416 -42 29 53.538761832   8.47 8.24     A9VekA5mA5(_lB) 184 0
109 Ass Sco OB 2-2 * 15 43.6 -27 19           ~ 18 0
110 HD 142666 TT* 15 56 40.0221861696 -22 01 40.005872148 9.41 9.37 8.82 8.31 8.01 F0V_sh 242 0
111 * phi Ser PM* 15 57 14.5708375584 +14 24 52.132920192   6.677 5.530     K1IV 108 0
112 HD 144432 Ae* 16 06 57.9533126832 -27 43 09.760564056 8.47 8.53 8.19 7.82 7.53 A9/F0V 229 1
113 V* V856 Sco Ae* 16 08 34.2870044544 -39 06 18.325711332 7.66 7.41 7.05 6.92   A7IIIne_sh 372 0
114 V* V1027 Sco a2* 16 08 34.5616203192 -39 05 34.278268848   6.552 6.629 6.66   A0/3III 184 0
115 Lupus 3 SFR 16 09.6 -39 03           ~ 306 0
116 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1245 1
117 NAME Sco R1 As* 16 20 -22.0           ~ 10 0
118 * gam Her ** 16 21 55.2144050 +19 09 11.261793 4.22 4.03 3.76 3.47 3.33 A9IIIbn 172 0
119 * 15 Dra * 16 27 59.0145650664 +68 46 05.293510572 4.84 4.906 4.949     B9.5IV 86 0
120 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3396 1
121 NAME Sco-Oph Region reg 16 30.0 -21 00           ~ 72 0
122 NAME dze Oph Cloud Cld 16 37 09 -10 34.0           ~ 107 0
123 HD 150193 Be* 16 40 17.9243127240 -23 53 45.193372692 9.69 9.32 8.79 8.41   B9.5Ve 306 0
124 LDN 1729 DNe 16 43.0 -24 06           ~ 31 0
125 V* AK Sco Ae* 16 54 44.8491575376 -36 53 18.566586456 9.80 9.63 9.00     F5V 258 1
126 EM* AS 220 Ae* 17 10 08.1238 -27 15 18.801 12.86 12.79 12.22 12.03 10.82 A6Ve+G5Ve 137 0
127 HD 156208 EB* 17 16 14.2604265768 +02 11 10.330286712 6.57 6.41 6.18 5.98   A1IV 67 0
128 * bet Dra * 17 30 25.9616959 +52 18 04.999351 4.43 3.79 2.81 2.12 1.64 G2Ib-IIa 402 0
129 * alf Oph ** 17 34 56.06945 +12 33 36.1346 2.32 2.22 2.07 1.93 1.85 A5IVnn 461 0
130 HD 160365 PM* 17 38 57.8551898904 +13 19 45.311464560   6.678 6.123     F6III 84 0
131 * mu.01 Her ** 17 46 27.5472960785 +27 43 14.560978925 4.56 4.17 3.42 2.89 2.51 G5IV 676 0
132 HD 163296 Ae* 17 56 21.2881851168 -21 57 21.871819008 7.00 6.93 6.85 6.86 6.67 A1Vep 976 0
133 * zet Ser PM* 18 00 29.0113725 -03 41 24.968552   4.982 4.616     F2V 186 0
134 * 67 Oph * 18 00 38.7157893000 +02 55 53.633402904 3.34 3.96 3.93 3.84 3.81 B5I 396 0
135 * mu. Sgr s*b 18 13 45.8088401 -21 03 31.794073 3.60 4.07 3.85 3.58 3.38 B8Iab(e) 338 0
136 HD 169142 Ae* 18 24 29.7799891464 -29 46 49.327400568   8.42 8.16     F1VekA3mA3_lB? 397 2
137 * 110 Her PM* 18 45 39.7256792847 +20 32 46.713086264 4.66 4.65 4.19 3.80 3.54 F5.5IV-V 396 0
138 V* R CrA Ae* 19 01 53.6764322232 -36 57 08.299341828 12.781 12.651 11.917 11.242 10.412 B5IIIpe 466 1
139 V* WW Vul Ae* 19 25 58.7494120560 +21 12 31.333658616 11.46 10.99 10.25 10.38 10.12 A2IVe 221 0
140 HD 183143 s*b 19 27 26.5636061496 +18 17 45.193019136 8.25 8.08 6.86 5.74 4.79 B6Ia 426 0
141 * sig Dra PM* 19 32 21.5902098601 +69 39 40.235805206 5.860 5.460 4.680 4.04 3.63 K0V 604 0
142 * tet Cyg PM* 19 36 26.5343563 +50 13 15.964573 4.83 4.86 4.48 4.13 3.92 F3+V 339 1
143 * del Cyg PM* 19 44 58.4785413 +45 07 50.916066 2.75 2.85 2.87 2.88 2.90 A0IV 284 0
144 * 15 Vul a2* 20 01 06.0484585 +27 45 12.863884   4.829 4.651     A4III 231 0
145 * alf Cyg sg* 20 41 25.91514 +45 16 49.2197 1.11 1.34 1.25 1.14 1.04 A2Ia 734 0
146 * eta Cep PM* 20 45 17.3755540 +61 50 19.616737 4.960 4.320 3.410 2.76 2.27 K0IV 431 0
147 HD 199143 PM* 20 55 47.6748292416 -17 06 51.061731768   7.84 7.32 8.29   F8V 115 0
148 * sig Cyg sg* 21 17 24.9524404 +39 23 40.852798 3.98 4.37 4.24 4.06 3.92 A0Ia 260 0
149 BD+46 3471 Ae* 21 52 34.0992801288 +47 13 43.605617340 10.72 10.56 10.15     A0.5IIIer 205 1
150 IC 5146 OpC 21 53 29 +47 14.8           ~ 429 2
151 HD 210221 Pu* 22 07 25.5851458248 +53 18 26.773650216 6.81 6.555 6.171     A3Ib 78 0
152 * 4 Lac * 22 24 30.9914928480 +49 28 35.010584652 4.33 4.67 4.58 4.45 4.35 A0Ib 178 0
153 * 1 Psc * 22 54 59.4854027112 +01 03 53.649607140   6.31 6.11     A3IV 41 0
154 V* DI Cep Or* 22 56 11.5377385392 +58 40 01.773069276   12.01 11.95     G8IVe 133 0
155 * alf PsA ** 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1186 3
156 BD+47 4206 * 23 36 40.4886243000 +48 14 26.656336464   9.54 9.23     F2 8 0
157 Ass Ori OB 1a As* ~ ~           ~ 217 0

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2022.09.26-09:10:23

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