The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 40 Issue 2
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- Pages.35.4-36
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- 2015
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- 1226-2692(pISSN)
Inner disk properties of a Class I young stellar object revealed by IGRINS
- Lyo, A-Ran (Korea Astronomy and Space Science Institute) ;
- Kim, Jongsoo (Korea Astronomy and Space Science Institute) ;
- Byun, Do-Young (Korea Astronomy and Space Science Institute) ;
- Kang, Jihyun (Korea Astronomy and Space Science Institute)
- Published : 2015.10.15
Abstract
Gaseous inner disks are the main controller of the final structure of planetary systems as well as the building place of planets, especially of terrestrial planets. However, the inner disk of <5AU is still difficult to be spatially resolved even at the closest star forming regions. Resolving velocity structure in the disk with high resolution infrared spectroscopic study is the best approach to study the inner disk at this moment. Here, we present the IGRINS (Immersion GRating INfrared Spectrometer) result of the Class I young stellar object, ESO Ha 279a, in the Serpens molecular cloud region. IGRINS has a resolving power of R=40,000, corresponding to the velocity resolution of 7 km/s at K-band, which is perfect to study the hot inner disk structure. We report that NaI and CO overtone emission lines are indeed good tracers of the rotating inner warm disk tracing from ~0.04 to ~7AU of this source. We also report the disk properties using other emission lines.
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