2010A&A...516A..48V


Query : 2010A&A...516A..48V

2010A&A...516A..48V - Astronomy and Astrophysics, volume 516, A48-48 (2010/6-2)

HD 95881: a gas rich to gas poor transition disk?

VERHOEFF A.P., MIN M., ACKE B., VAN BOEKEL R., PANTIN E., WATERS L.B.F.M., TIELENS A.G.G.M., VAN DEN ANCKER M.E., MULDERS G.D., DE KOTER A. and BOUWMAN J.

Abstract (from CDS):

Based on the far infrared excess the Herbig class of stars is divided into a group with flaring circumstellar disks (group I) and a group with flat circumstellar disks (group II). Dust sedimentation is generally proposed as an evolution mechanism to transform flaring disks into flat disks. Theory predicts that during this process the disks preserve their gas content, however observations of group II Herbig Ae stars demonstrate a lack of gas. We map the spatial distribution of the gas and dust around the group II Herbig Ae star HD95881. We analyze optical photometry, Q-band imaging, infrared spectroscopy, and K and N-band interferometric spectroscopy. We use a Monte Carlo radiative transfer code to create a model for the density and temperature structure which quite accurately reproduces all the observables. We derive a consistent picture in which the disk consists of a thick puffed up inner rim and an outer region which has a flaring gas surface and is relatively void of ``visible'' dust grains. HD95881 is in a transition phase from a gas rich flaring disk to a gas poor self-shadowed disk.

Abstract Copyright:

Journal keyword(s): infrared: stars - stars: pre-main sequence - stars: planetary systems: protoplanetary disks

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 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 187 1
2 HD 95881 Em* 11 01 57.6218887080 -71 30 48.316074624   8.37 8.23     A0 94 0
3 HD 98922 Be* 11 22 31.6743077592 -53 22 11.457008148   6.80 6.76     B9Ve 126 1
4 HD 100901 PM* 11 35 45.0535599072 -72 50 30.991784136   7.701 6.525     K0/1III 18 0
5 HD 101412 Be* 11 39 44.4564911064 -60 10 27.719780304   9.465 9.288     A3VaekA0mA0_lB 131 0
6 V* V918 Cen LP* 11 47 19.1412363000 -57 41 47.402548440   7.055 5.407     K5III 45 0
7 Ass Sco OB 2-4 * 15 50.2 -25 23           ~ 7 0
8 HD 142666 TT* 15 56 40.0221861696 -22 01 40.005872148 9.41 9.37 8.82 8.31 8.01 F0V_sh 246 0

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2023.02.07-16:33:41

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