2001A&A...375..927L

Query : 2001A&A...375..927L

2001A&A...375..927L - Astronomy and Astrophysics, volume 375927-936 (2001/9-1)

Halos around Herbig Ae/Be stars - more common than for the less massive T Tauri stars.

LEINERT C., HAAS M., ABRAHAM P. and RICHICHI A.

Abstract (from CDS):

We present sub-arcsec observations of a sample of 31 Herbig Ae/Be and related stars obtained with the technique of near-infrared speckle interferometry. In 18 of the 31 stars we find evidence for circumstellar halos. These halos have a typical size of 1.1'', corresponding to ≃1000AU at the distances of the objects. Most of the halos have blue colours, hence are seen in scattered light. The incidence of observable circumstellar matter is significantly higher than in a larger sample of T Tauri stars observed with the same technique (Leinert et al., 1993A&A...278..129L). We suggest that this difference results as a consequence of a faster initial evolution of the more massive Herbig Ae/Be stars. The near-infrared halos found in our study appear to correspond to the ``envelopes'' invoked to model the strong mid-infrared excesses of Herbig Ae/Be stars.

Abstract Copyright: ∼

Journal keyword(s): stars: circumstellar matter - stars: pre-main-sequence

Simbad objects: 41

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Number of rows : 41
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 EM* LkHA 198 Ae* 00 11 25.8495450336 +58 49 28.713961920   14.65 13.79 14.03   B9e 226 0
2 V* V376 Cas Ae* 00 11 26.5410514344 +58 50 03.929517960           A3/F2e 99 1
3 BD+61 154 Ae* 00 43 18.2566590360 +61 54 40.139212716 10.83 11.13 10.60     B8eq 217 1
4 NAME AFGL 4029 IRS 1 Y*O 03 01 29.2 +60 29 12           ~ 112 1
5 NAME W 5 East MoC 03 01 32 +60 29.2           ~ 130 2
6 RAFGL 490 Or* 03 27 38.7928952784 +58 47 00.025298088           ~ 359 0
7 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 324 0
8 V* DG Tau TT* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1092 1
9 EM* LkHA 101 Em* 04 30 14.4355820328 +35 16 23.983198932   17.91 15.71 13.33   F 376 1
10 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
11 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
12 Kim 1-3 * 04 37 15.1851892128 +25 17 30.619011984           K1III 24 0
13 2MASS J04484817+2538123 AB? 04 48 48.1790052768 +25 38 12.379060248           M2.0III 5 0
14 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1176 2
15 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 199 1
16 V* T Ori Ae* 05 35 50.4482802768 -05 28 34.925254536 12.724 11.637 11.248 10.09 10.043 A8VnekA1mA2_lB 259 0
17 BD-06 1253 Ae* 05 36 25.4320468080 -06 42 57.684730284   11.65 10.9 10.29   A1e 450 1
18 EM* LkHA 208 Ae* 06 07 49.5332003976 +18 39 26.487297072   11.78 11.30 11.39   F0Ve 129 1
19 V* R Mon Ae* 06 39 09.9542000448 +08 44 09.539482632 10.76 12.46 11.85 10.96 10.25 B8IIIe 525 0
20 EM* LkHA 25 Ae* 06 40 44.6376365304 +09 48 02.151653868 12.745 13.03 18.85 12.545 12.386 B4Ve 153 0
21 V* Z CMa Ae* 07 03 43.1599411656 -11 33 06.209065836 10.51 9.99 8.80     B5/8eq+F5/7 601 3
22 RAFGL 4176 Y*O 13 43 01.70352 -62 08 51.2304           ~ 163 0
23 [GGB2012] G308.9176+00.1231 HII 13 43 02.1 -62 08 52           ~ 59 0
24 V* V856 Sco Ae* 16 08 34.2870044544 -39 06 18.325711332 7.66 7.41 7.05 6.92   A9V_sh 405 0
25 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
26 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 164 0
27 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 205 0
28 CD-42 11721 Be* 16 59 06.7629322176 -42 42 08.404228224 12.16 12.28 11.00     B0IVe 179 0
29 CD-27 11501 Ae* 17 10 08.11008 -27 15 19.0116 12.86 12.787 12.225 12.03 10.82 A6Ve+G5Ve 147 0
30 IRAS 17216-3801 Y*O 17 25 06.51720 -38 04 00.4368           ~ 37 0
31 V* VV Ser Ae* 18 28 47.8620017808 +00 08 39.923474964 12.99 12.63 11.80 11.01 10.24 A5Ve 262 0
32 EM* MWC 300 Ae* 18 29 25.6913480400 -06 04 37.290320796 12.55 12.67 13.795     B1Ia+[e] 145 0
33 V* R CrA Ae* 19 01 53.6764322232 -36 57 08.299341828 12.781 12.651 11.917 11.242 10.412 B5IIIpe 499 2
34 V* T CrA Ae* 19 01 58.777008 -36 57 49.93704   14.087 13.130 11.823 10.678 F5? 179 0
35 Min 3-60 LP? 20 04 23.6504906400 +33 39 04.363566300           K?e 66 1
36 BD+40 4124 Ae* 20 20 28.2413946720 +41 21 51.529070088 11.11 11.36 10.62 10.510   B2Ve 303 0
37 V* PV Cep Or* 20 45 53.9540390184 +67 57 38.679941304   19.27 17.46 15.98 14.60 A5 282 1
38 V* V645 Cyg Ae* 21 39 58.2745507632 +50 14 21.042184668   14.23 13.10 13.82   O6/9eq 279 0
39 EM* LkHA 234 Ae* 21 43 06.8218113480 +66 06 54.202272804 13.65 13.61 12.73 11.98 11.20 B5Ve 295 0
40 EM* LkHA 233 Ae* 22 34 40.984104 +40 40 04.19520   14.356 13.527 13.673   A7Ve 150 0
41 EM* MWC 1080 Ae* 23 17 25.5895018656 +60 50 43.444557384   13.24 11.85 11.251   B0eq 331 0

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