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Cold CO gas in the disk of the young eruptive star EX Lup | | Ágnes Kóspál
; Péter Ábrahám
; Timea Csengeri
; Uma Gorti
; Thomas Henning
; Attila Moór
; Dmitry A. Semenov
; László Szűcs
; Rolf Güsten
; | | Date: |
9 Mar 2016 | | Abstract: | EX Lupi-type objects (EXors) form a sub-class of T Tauri stars, defined by
sudden sporadic flare-ups of 1-5 magnitudes 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 $^{12}$CO J=3-2 and 4-3 lines, and the
$^{13}$CO 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. | | Source: | arXiv, 1603.2855 | | Services: | Forum | Review | PDF | Favorites | |
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