2003A&A...400L..21V


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.09CET17:52:45

2003A&A...400L..21V - Astronomy and Astrophysics, volume 400, L21-24 (2003/3-4)

Grain growth in the inner regions of Herbig Ae/Be star disks.

VAN BOEKEL R., WATERS L.B.F.M., DOMINIK C., BOUWMAN J., DE KOTER A., DULLEMOND C.P. and PARESCE F.

Abstract (from CDS):

We present new mid-infrared spectroscopy of the emission from warm circumstellar dust grains in Herbig Ae/Be stars. Our survey significantly extends the sample that was studied by Bouwman et al. (2001A&A...375..950B). We find a correlation between the strength of the silicate feature and its shape. We interpret this as evidence for the removal of small (0.1µm) grains from the disk surface while large (1-2µm) grains persist. If the evolution of the grain size distribution is dominated by gravitational settling, large grains are expected to disappear first, on a timescale which is much shorter than the typical age of our programme stars. Our observations thus suggest a continuous replenishment of micron sized grains at the disk surface. If the grain replenishment is due to the dredge-up of dust from the disk interior, the mineralogy we observe is representative of the bulk composition of dust in these stars.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: pre-main-sequence - infrared: ISM: lines and bands

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* UX Ori Ae* 05 04 29.9881676817 -03 47 14.288047238 10.25 10.93 8.70 9.62 9.43 A4IVe 328 1
2 HD 37357 Ae* 05 37 47.0795535305 -06 42 30.203876953   8.96 8.85     A1V 94 0
3 HD 37806 Be* 05 41 02.2930276072 -02 43 00.729083804 7.67 7.93 7.90     B9/9.5II/III 133 0
4 HD 95881 Em* 11 01 57.6212785173 -71 30 48.313329972   8.37 8.23     A0 84 0
5 HD 98922 Be* 11 22 31.6740564115 -53 22 11.456030308   6.80 6.76     B9Ve 111 1
6 HD 101412 Be* 11 39 44.4562795603 -60 10 27.717502041   9.465 9.288     A3VaekA0mA0_lB 111 0
7 V* DX Cha Ae* 12 00 05.0870448691 -78 11 34.559255151   6.81 6.60     A0_sh 299 0
8 HD 142666 TT* 15 56 40.0222941557 -22 01 40.004849949 9.41 9.37 8.82 8.31 8.01 F0V_sh 204 0
9 HD 144432 Ae* 16 06 57.9530266912 -27 43 09.758016578 8.47 8.53 8.19 7.82 7.53 A9/F0V 207 1
10 HD 150193 Be* 16 40 17.9242900066 -23 53 45.192676418 9.69 9.32 8.79 8.41   B9.5Ve 286 0
11 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 738 0

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2019.12.09-17:52:45

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