Naslov
Near-Infrared and the Inner Regions of Protoplanetary Disks

Autori
Vinković, Dejan ; Ivezić, Željko ; Jurkić, Tomislav ; Elitzur, Moshe

Izvornik
The Astrophysical Journal (0004-637X) 636 (2006), 1; 348-361

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

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

Sažetak
We examine the "puffed-up inner disk" model proposed by Dullemond, Dominik, & Natta for explaining the near-IR excess radiation from Herbig Ae/Be stars. Detailed model computations show that the observed near-IR excess requires more hot dust than is contained in the puffed-up disk rim. The rim can produce the observed near-IR excess only if its dust has perfectly gray opacity, but such dust is in conflict with the observed 10 &#956; m spectral feature. We find that a compact (~10 AU), tenuous (&#964; V<~0.4), dusty halo around the disk inner regions contains enough dust to readily explain the observations. Furthermore, this model also resolves the puzzling relationship noted by Monnier & Millan-Gabet between luminosity and the interferometric inner radii of disks.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA