2012MNRAS.421L..97R

Query : 2012MNRAS.421L..97R

2012MNRAS.421L..97R - Mon. Not. R. Astron. Soc., 421, L97-L101 (2012/March-3)

WISE circumstellar discs in the young Sco-Cen association.

RIZZUTO A.C., IRELAND M.J. and ZUCKER D.B.

Abstract (from CDS):

We present an analysis of the WISE photometric data for 829 stars in the Sco-Cen OB2 association, using the latest high-mass membership probabilities. We detect infrared excesses associated with 135 BAF-type stars, 99 of which are secure Sco-Cen members. There is a clear increase in excess fraction with membership probability, which can be fitted linearly. We infer that 41±5 per cent of Sco-Cen OB2 BAF stars have excesses, while the field star excess fraction is consistent with zero. This is the first time that the probability of non-membership has been used in the calculation of excess fractions for young stars. We do not observe any significant change in excess fraction between the three subgroups. Within our sample, we have observed that B-type association members have a significantly smaller excess fraction than A- and F-type association members.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): planets and satellites: formation - protoplanetary discs - circumstellar matter - stars: early-type - open clusters and associations: individual (Sco-Cen, Sco OB2)

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 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
2 HD 87713 * 10 04 34.0709382864 -64 38 51.817616232   6.84 6.91     B9V 21 0
3 HD 89903 * 10 20 18.8414432928 -66 03 49.019500584   7.59 7.50     A0/1Vn 23 0
4 HD 89974 * 10 20 49.1243746440 -67 31 32.731402836   8.36 8.33     B9/A1(V) 19 0
5 HD 90856 * 10 27 06.6079871880 -68 29 54.491967312   8.24 8.26     B8V 18 0
6 HD 90837 * 10 27 30.2505358824 -63 31 23.762717940   8.52 8.32     A3IV 27 0
7 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
8 HD 93874 * 10 48 41.9556676536 -63 49 58.846928484   8.35 8.19     A3(IV) 44 0
9 HD 95086 * 10 57 03.0215719872 -68 40 02.449216128   7.60 7.36     A8III 208 1
10 HD 95911 * 11 02 45.0334632960 -63 29 40.574349492   9.69 9.26     F0V 27 0
11 HD 99149 * 11 23 39.1700827440 -65 50 04.051859136   8.27 8.14     A1V 20 0
12 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
13 HD 107301 * 12 20 28.2217292304 -65 50 33.568205244   6.149 6.186     B9V 57 0
14 HD 108904 * 12 31 12.6411305400 -61 54 31.491133380   8.48 7.99     F6V 57 0
15 HD 111161 * 12 48 16.6672879464 -67 07 52.362291864   7.78 7.60     A3III/IV 47 0
16 CPD-66 1944B * 12 48 18.9468926496 -67 07 54.197705208   9.05 8.69     ~ 25 0
17 HD 112383 * 12 57 26.1882805944 -67 57 38.531264580   6.831 6.771     A2IV/V 36 0
18 HD 112701 * 12 59 27.0099833808 -57 31 53.009296140   9.70 9.32     F2V 21 0
19 HD 121901 PM* 14 00 17.3911443816 -61 28 51.698057988   6.793 6.469     F0/2III/IV 36 0
20 HD 129683 * 14 44 56.8761120216 -34 22 53.756100804   10.21 9.72     F6V 33 0
21 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
22 HD 138204 PM* 15 32 04.1861397384 -38 37 21.147088080   6.424 6.219     A3III 38 0
23 HD 138276 * 15 34 14.4810115080 -60 48 28.535119884   7.23 7.17     B9/9.5V 18 0
24 HD 139731 PM* 15 40 37.8235742472 -25 35 33.054621720   8.34 7.96     F0V 33 0
25 HD 140817 ** 15 47 04.4561718672 -35 30 37.241353908   6.89 6.92     A0V 49 0
26 HD 141327 * 15 49 43.1037975984 -32 48 29.830563612   7.46 7.46     B9V 47 0
27 HD 141168 Pu* 15 50 07.0836208248 -53 12 35.174581380 5.51 5.72 5.78     B9V(n) 54 0
28 HD 142315 SB* 15 54 41.5962061728 -22 45 58.513986900   6.887 6.861     B9V 126 0
29 HD 142832 * 15 58 05.4575891064 -35 32 04.684514460   9.98 9.54     F3V 26 0
30 HD 143023 * 15 59 54.7771801080 -46 17 56.814542556   7.86 7.70     B9V 16 0
31 HD 144116 * 16 05 28.5767757480 -34 00 16.039712376   8.24 8.00     A2IV/V 17 0
32 HD 144432 Ae* 16 06 57.9533126832 -27 43 09.760564056 8.47 8.53 8.19 7.82 7.53 A9IVe 266 0
33 HD 144844 V* 16 08 43.7202865416 -23 41 07.483461252 5.59 5.90 5.88     B9V 168 0
34 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
35 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
36 HD 145984 * 16 15 37.1533231968 -41 38 58.765522416   9.22 8.85     F2V 39 0
37 HD 147009 * 16 20 03.9804239064 -20 02 41.528806944   8.32 8.06     A0V 97 1
38 HD 147911 * 16 25 24.1085916504 -21 41 18.712276656   9.62 9.17     A0V 38 0
39 HD 148657 * 16 31 11.6734176720 -38 22 58.746827244   8.81 8.55     A0V 32 1
40 HD 328333 * 16 31 28.4746939800 -44 55 43.951627452   10.79 10.25     F2IV 18 0
41 HD 149425 * 16 36 28.6730639112 -40 18 10.916595000   7.20 7.10     B9V 48 0
42 HD 150638 * 16 43 38.7239230704 -32 06 21.406227192   6.374 6.452     B8V 56 0
43 HD 151109 * 16 47 01.6778010840 -39 32 01.941644076   6.94 7.00     B9IV/V 43 0
44 CD-27 11363 TT* 17 00 34.9771479264 -27 38 04.401776472   11.67 10.88     K2Ve 39 0
45 HD 156623 * 17 20 50.6171972808 -45 25 15.003951564   7.35 7.26     A0V 76 0
46 HD 160959 * 17 44 45.3185724576 -39 50 54.313732176   8.94 8.60     F0V 29 0

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