천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제44권2호
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- Pages.50.2-50.2
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- 2019
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- 1226-2692(pISSN)
High-resolution optical and near-infrared spectroscopic study of 2MASS J06593158-0405277
- Park, Sunkyung (School of Space Research, Kyung Hee University) ;
- Lee, Jeong-Eun (School of Space Research, Kyung Hee University) ;
- Pyo, Tae-Soo (Subaru Telescope, National Astronomical Observatory of Japan) ;
- Sung, Hyun-Il (Korea Astronomy and Space Science Institute) ;
- Lee, Sang-Gak (Seoul National University) ;
- Kang, Wonseok (National Youth Space Center) ;
- Oh, Hyung-Il (Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
- Yoon, Tae Seog (Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
- Mace, Gregory N. (Department of Astronomy, University of Texas at Austin) ;
- Jaffe, Daniel T. (Department of Astronomy, University of Texas at Austin) ;
- Yoon, Sung-Yong (School of Space Research, Kyung Hee University) ;
- Green, Joel D. (Space Telescope Science Institute)
- 발행 : 2019.10.14
초록
We present the results of high-resolution (R ≥ 30,000) optical and near-infrared spectroscopic monitoring observations of a FU Orionis-type object, 2MASS J06593158-0405277. We have monitored 2MASS J06593158-0405277 with the Bohyunsan Optical Echelle Spectrograph (BOES) and the Immersion GRating INfrared Spectrograph (IGRINS) since December 2014. Various features produced by wind, disk, and outflow/jet were detected. The wind features varied over time and disappeared about a year after the outburst occurred. The double-peaked line profiles were detected in the optical and near-infrared, and the line widths decrease with increasing wavelength. The disk features in the optical spectra are fit well with G2-type or G5-type stellar spectra convolved with a disk rotational profile of about 45 km s-1, which corresponds to a disk radius of about 71 R⊙for a central mass of 0.75 M⊙. Disk features in near-infrared spectra are fit well with a K1-type stellar spectrum convolved with a disk rotational profile of about 35 km s-1, which corresponds to a disk radius of about 117 R⊙ for a central mass of 0.75 M⊙. We also detected [S II] and H2 emission lines, which are rarely found in FUors but are usually found in the earlier stage of young stellar objects. Therefore, we suggest that 2MASS J06593158-0405277 is in the relatively earlier part of Class II stage.
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