Dust emission from Herbig Ae/Be stars: Evidence for disks and envelopes

被引：56

作者：

Miroshnichenko, A ^{[1
]}

Ivezic, Z

Vinkovic, D

Elitzur, M

机构：

[1] Pulkovo Observ, St Petersburg 196140, Russia

[2] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[3] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[4] Ctr Etud Saclay, Serv Astrophys, F-91190 Gif Sur Yvette, France

来源：

ASTROPHYSICAL JOURNAL | 1999年 / 520卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

accretion; accretion disks; circumstellar matter; dust; extinction stars : pre-main-sequence;

D O I：

10.1086/312159

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Infrared and millimeter-wave emission from Herbig Ae/Be stars has produced conflicting conclusions regarding the dust geometry in these objects. We show that the compact dimensions of the millimeter-wave-emitting regions are a decisive indication for disks. But a disk cannot explain the spectral energy distribution unless it is embedded in an extended envelope that (1) dominates the LR emission and (2) provides additional disk heating on top of the direct stellar radiation. Detailed radiative transfer calculations based on the simplest model for envelope-embedded disks successfully fit the data from UV to millimeter wavelengths and show that the disks have central holes. This model also resolves naturally some puzzling results of IR imaging.

引用

页码：L115 / L118

页数：4