2001ApJ...546..352S

Query : 2001ApJ...546..352S

2001ApJ...546..352S - Astrophys. J., 546, 352-357 (2001/January-1)

Ages of A-type Vega-like stars from uvbyβ photometry.

SONG I., CAILLAULT J.-P., BARRADO Y NAVASCUES D. and STAUFFER J.R.

Abstract (from CDS):

We have estimated the ages of a sample of A-type Vega-like stars by using Strömgren uvbyβ photometric data and theoretical evolutionary tracks. We find that 13% of these A stars have been reported as Vega-like stars in the literature and that the ages of this subset run the gamut from very young (50 Myr) to old (1 Gyr), with no obvious age difference compared to those of field A stars. We clearly show that the fractional IR luminosity decreases with the ages of Vega-like stars.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Stars: Planetary Systems - Stars: Early-Type

Simbad objects: 46

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Number of rows : 46
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 * kap Phe PM* 00 26 12.2013436436 -43 40 47.390371480 4.22 4.11 3.94 3.78 3.70 A5IVn 158 0
2 * bet03 Tuc ** 00 32 43.9053745704 -63 01 53.402028960 5.15 5.13 5.09     A0V 139 0
3 * tet Cas PM* 01 11 06.1620929203 +55 08 59.638991981 4.630 4.510 4.330 4.16 4.09 A7V 210 0
4 * gam Tri PM* 02 17 18.8672733581 +33 50 49.908545398   4.02 4.00   4.05 A1Vnn 213 0
5 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
6 * tau03 Eri PM* 03 02 23.4993592222 -23 37 28.098204536 4.33 4.25 4.09 3.96 3.87 A3IV-V 167 0
7 * zet Eri SB* 03 15 50.0256861408 -08 49 11.036581032 5.11 5.03 4.80 4.59 4.47 kA4hA9mA9V 154 0
8 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
9 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
10 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
11 * del Dor * 05 44 46.3699967519 -65 44 07.793159129 4.69 4.57 4.36 4.10 3.93 A7V 138 0
12 * zet Lep * 05 46 57.3413646658 -14 49 19.020570470   3.637 3.525     A2IV-V(n) 308 0
13 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 2087 1
14 * mu. Ori SB* 06 02 22.99668 +09 38 50.1820 4.40     3.94 3.86 A1Vm+F2V 268 0
15 * alf Pic PM* 06 48 11.45512 -61 56 29.0008   3.46 3.23     A8VnkA6 182 0
16 * 30 Mon PM* 08 25 39.6318651278 -03 54 23.137987255 3.85 3.88 3.90 3.87 3.92 A0Va 289 0
17 * del01 Vel ** 08 44 42.226383 -54 42 31.75567           A2IV+A4V 214 0
18 * alf Vol ** 09 02 26.7960439246 -66 23 45.868433822   4.144 3.990     kA3hA5mA5V 116 1
19 * f UMa PM* 09 08 52.2569720765 +51 36 16.731901694 4.87 4.75 4.48 4.21 4.10 kA3VmF5IIISr 163 0
20 * 21 LMi dS* 10 07 25.7623702826 +35 14 40.905120440 4.74 4.67 4.49 4.31 4.24 A7V(n) 234 0
21 HD 91312 SB* 10 33 13.8899225424 +40 25 31.966831164   4.921 4.715     A7IV 106 0
22 * bet UMa PM* 11 01 50.4797515135 +56 22 56.761138187 2.35 2.35 2.37 2.31 2.35 A1IVps 462 0
23 * gam Crt PM* 11 24 52.9236160183 -17 41 02.442764421   4.25 4.06 6.12   A7V(n) 139 0
24 * bet Leo dS* 11 49 03.57834 +14 34 19.4090 2.30 2.22 2.13 2.08 2.06 A3Va 605 1
25 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0V 417 0
26 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
27 * eps UMa a2* 12 54 01.7495922 +55 57 35.362645 1.76 1.75 1.77 1.79 1.82 A1III-IVpkB9 488 0
28 * lam Boo dS* 14 16 23.0184083839 +46 05 17.895459693 4.31 4.26 4.18 4.16 4.13 A0Va_lB 362 0
29 * eta Aps PM* 14 18 13.8958998144 -81 00 27.930594204   5.130 4.889     A2mA7-F2 61 0
30 * bet Cir PM* 15 17 30.8494520580 -58 48 04.345266926   4.153 4.057     A3Va 136 0
31 * 10 Ser PM* 15 28 38.2370204448 +01 50 31.486733628   5.40 5.17     A6III 70 0
32 * alf CrB SB* 15 34 41.2684881676 +26 42 52.866000089 2.19 2.22 2.24 2.21 2.25 A1IV 499 0
33 * bet Ser PM* 15 46 11.2551806454 +15 25 18.549468647 3.81 3.73 3.67 3.61 3.58 A2IV 189 0
34 * pi. Ara PM* 17 38 05.5153908936 -54 30 01.562028048   5.431 5.242     A5IV/V 104 0
35 * gam Oph PM* 17 47 53.5605898827 +02 42 26.204838837 3.83 3.80 3.75 3.71 3.71 A1VnkA0mA0 411 0
36 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
37 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
38 HD 172555 PM* 18 45 26.9009806435 -64 52 16.534807985   4.967 4.767     A7V 321 0
39 * alf CrA PM* 19 09 28.3415149600 -37 54 16.107840507   4.146 4.087     A2Va 120 0
40 * eta Tel PM* 19 22 51.2060774616 -54 25 26.145617376   5.035 5.020   4.99 A0V 228 0
41 * 33 Cyg PM* 20 13 23.8660633993 +56 34 03.803286781   4.384 4.271     A3IV-Vn 92 0
42 * rho Aql PM* 20 14 16.6186826232 +15 11 51.386417088   5.006 4.946     A1Va 137 0
43 * alf Cep PM* 21 18 34.77233 +62 35 08.0681 2.770 2.680 2.460 2.22 2.11 A8Vn 374 0
44 * bet Oct PM* 22 46 03.5109801 -81 22 53.811985   4.333 4.128     A9IV/V 69 0
45 * alf PsA PM* 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1303 3
46 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1285 0

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