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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731547.0, MPI für Astronomie / Publikationen_mpia
Cold CO gas in the disk of the young eruptive star EX Lup
Authors:Kóspál, Á.; Ábrahám, P.; Csengeri, T.; Gorti, U.; Henning, T.; Moór, A.; Semenov, D. A.; Szűcs, L.; Güsten, R.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:The Astrophysical Journal Letters
Volume:821
Issue / Number:1
Start Page:id. L4, (4 pp)
Audience:Not Specified
Abstract / Description:EX Lupi-type objects (EXors) form a sub-class of T Tauri stars, defined by sudden sporadic flare-ups of 1–5 mag at optical wavelengths. These eruptions are attributed to enhanced mass accretion from the circumstellar disk to the star, and may constitute important events in shaping the structure of the inner disk and the forming planetary system. Although disk properties must play a fundamental role in driving the outbursts, they are surprisingly poorly known. In order to characterize the dust and gas components of EXor disks, here we report on observations of the 12CO J = 3‑2 and 4–3 lines, and the 13CO 3–2 line in EX Lup, the prototype of the EXor class. We reproduce the observed line fluxes and profiles with a line radiative transfer model and compare the obtained parameters with corresponding ones of other T Tauri disks.
Free Keywords:stars: individual: EX Lup; stars: pre-main sequence; stars: variables: T Tauri; Herbig Ae/Be
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.3847/2041-8205/821/1/L4
URL:http://cdsads.u-strasbg.fr/abs/2016ApJ...821L...4K
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