SIMBAD references

2007ApJ...666..466C - Astrophys. J., 666, 466-474 (2007/September-1)

The dust and gas around β Pictoris.

CHEN C.H., LI A., BOHAC C., KIM K.H., WATSON D.M., VAN CLEVE J., HOUCK J., STAPELFELDT K., WERNER M.W., RIEKE G., SU K., MARENGO M., BACKMAN D., BEICHMAN C. and FAZIO G.

Abstract (from CDS):

We have obtained Spitzer IRS 5.5-35 µm spectroscopy of the debris disk around β Pictoris. In addition to the 10 µm silicate emission feature originally observed from the ground, we also detect the crystalline silicate emission bands at 28 and 33.5 µm. This is the first time that the silicate bands at wavelengths longer than 10 µm have ever been seen in the β Pictoris disk. The observed dust emission is well reproduced by a dust model consisting of fluffy cometary and crystalline olivine aggregates. We searched for line emission from molecular hydrogen and atomic [S I], Fe II, and Si II gas but detected none. We place a 3 σ upper limit of <17 M on the H2S(1) gas mass, assuming an excitation temperature of Tex=100 K. This suggests that there is less gas in this system than is required to form the envelope of Jupiter. We hypothesize that some of the atomic Na I gas observed in Keplerian rotation around β Pictoris may be produced by photon-stimulated desorption from circumstellar dust grains.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Stars: Planetary Systems: Formation - Stars: Planetary Systems: Protoplanetary Disks - Stars: Individual: Constellation Name: β Pictoris

Simbad objects: 4

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2007ApJ...666..466C and select 'bookmark this link' or equivalent in the popup menu


2019.10.23-21:26:15

© Université de Strasbourg/CNRS

    • Contact