| タイトル | Seeds Adaptive Optics Imaging of the Asymmetric Transition Disk OPH IRS 48 in Scattered Light |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150008993 |
| 著者（英） | Henning, Thomas; Hayashi, Saeko; Carson, Joseph; Hashimoto, Jun; Brandner, Wolfgang; Hayano, Yutaka; Fukagawa, Misato; Muto, Takayuki; Hodapp, Klaus; Russell, Ray W.; Swearingen, Jeremy R.; Akiyama, Eiji; Currie, Thayne; Egner, Sebastian E.; van der Marel, Nienke; Maaskant, Koen; Takami, Michihiro; Champney, Elizabeth H.; Min, Michiel; Brandt, Timothy D.; Hayashi, Masahiko; Close, Laird M.; Mayama, Satoshi; Kudo, Tomoyuki; Kuchner, Marc J.; Feldt, Markus; Sitko, Michael L.; Ishii, Miki; Kusakabe, Nobuhiko; Grady, Carol A.; Abe, Lyu; Guyon, Olivier; Goto, Miwa; McElwain, Michael W.; Follette, Katherine B. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2015-01-08 |
| 言語 | eng |
| 内容記述 | We present the first resolved near-infrared imagery of the transition disk Oph IRS 48 (WLY 2-48), which was recently observed with ALMA to have a strongly asymmetric submillimeter flux distribution. H-band polarized intensity images show an approximately 60 AU radius scattered light cavity with two pronounced arcs of emission, one from northeast to southeast and one smaller, fainter, and more distant arc in the northwest. K-band scattered light imagery reveals a similar morphology, but with a clear third arc along the southwestern rim of the disk cavity. This arc meets the northwestern arc at nearly a right angle, revealing the presence of a spiral arm or local surface brightness deficit in the disk, and explaining the east-west brightness asymmetry in the H-band data. We also present 0.8 - 5.4 microns IRTF SpeX spectra of this object, which allow us to constrain the spectral class to A0 +/- 1 and measure a low mass accretion rate of 108.5 solar mass per yr, both consistent with previous estimates. We investigate a variety of reddening laws in order to fit the multiwavelength spectral energy distribution of Oph IRS 48 and find a best fit consistent with a younger, higher luminosity star than previous estimates. |
| NASA分類 | Astrophysics; Instrumentation and Photography; Optics |
| レポートNO | GSFC-E-DAA-TN22028 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/558810 |
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