2004AJ....127.2246W

Query : 2004AJ....127.2246W

2004AJ....127.2246W - Astron. J., 127, 2246-2251 (2004/April-0)

A search for warm circumstellar disks in the TW Hydrae association.

WEINBERGER A.J., BECKLIN E.E., ZUCKERMAN B. and SONG I.

Abstract (from CDS):

A search for previously undetected optically thin disks around stars in the nearby, young, TW Hydrae Association (TWA) was conducted around 16 stars with sensitive 12 and 18 µm photometry. The survey could detect zodiacal-like dust, with temperature 200-300 K, at levels of LIR/L*=7x10–3. Possible mid-infrared excess emission from TWA 17 was detected at the 2 σ level, but none of the other stars showed evidence for circumstellar dust. The rapid disappearance of large amounts of dust around the K- and M-type stars in this sample may mean that any planet formation in the terrestrial planet region was completed very quickly. There appears to be a bimodal distribution of dust disks in TWA, with stars having either copious or negligible warm dust.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - Stars: Planetary Systems: Protoplanetary Disks - Stars: Late-Type - Stars: Pre-Main-Sequence

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 119 0
2 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 207 1
3 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1892 1
4 NAME TW Hya Association As* 11 01.9 -34 42           ~ 942 0
5 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 82 0
6 V* V1217 Cen BY* 11 21 05.4814169256 -38 45 16.522915140   14.04 12.58 12.34 10.515 M1Ve 78 0
7 CD-34 7390A TT* 11 21 17.2193334624 -34 46 45.503251608   12.88 11.46 11.43 9.57 M1Ve 100 0
8 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 58 0
9 CD-34 7390B TT* 11 21 17.4430606440 -34 46 49.775810700   13.43 11.96 11.31 9.88 M1Ve 70 0
10 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 190 0
11 TWA 19B Em* 11 47 20.5931919840 -49 53 04.336507860   13.82 12.30   10.21 K7e 30 0
12 HD 102458 Y*O 11 47 24.5438206248 -49 53 03.018484572   9.70 9.07   8.40 G4V 93 0
13 TWA 23 TT* 12 07 27.3763935312 -32 47 00.242923776   14.157 12.638 12.273   M2.5Ve 70 0
14 V* V1249 Cen TT* 12 15 30.7203201048 -39 48 42.606684144   13.09 11.160 10.919 9.50 M0.5 116 0
15 V* V1250 Cen TT* 12 34 20.4720080040 -48 15 19.545583716   13.3 12.2   11.80 M3 37 0
16 V* V1251 Cen TT* 12 34 20.6481372456 -48 15 13.531352148   13.3 12.2   11.90 M3.5 44 0
17 TWA 16 ** 12 34 56.302608 -45 38 07.63332   14.05 12.58 12.21 10.310 M2.5 56 0
18 HD 109573 PM* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774 7.25 5.81 A0V 634 1
19 V* V1267 Cen TT* 13 20 45.3877266600 -46 11 37.711450572   14.0 12.7   10.78 K5IVe 42 0
20 V* V1268 Cen TT* 13 21 37.2192317688 -44 21 51.861714228     12.952   10.965 M0.5 43 0

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