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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 730253.0, MPI für Astronomie / Publikationen_mpia
SEEDS adaptive optics imaging of the asymmetric transition disk Oph IRS 48 in scattered light
Authors:Follette, K. B.; Grady, C. A.; Swearingen, J. R.; Sitko, M. L.; Champney, E. H.; van der Marel, N.; Takami, M.; Kuchner, M. J.; Close, L. M.; Muto, T.; Mayama, S.; McElwain, M. W.; Fukagawa, M.; Maaskant, K.; Min, M.; Russell, R. W.; Kudo, T.; Kusakabe, N.; Hashimoto, J.; Abe, L.; Akiyama, E.; Brandner, W.; Brandt, T. D.; Carson, J.; Currie, T.; Egner, S. E.; Feldt, M.; Goto, M.; Guyon, O.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K.; Ishii, M.; Iye, M.; Janson, M.; Kandori, R.; Knapp, G. R.; Kuzuhara, M.; Kwon, J.; Matsuo, T.; Miyama, S.; Morino, J.-I.; Moro-Martin, A.; Nishimura, T.; Pyo, T.-S.; Serabyn, E.; Suenaga, T.; Suto, H.; Suzuki, R.; Takahashi, Y.; Takato, N.; Terada, H.; Thalmann, C.; Tomono, D.; Turner, E. L.; Watanabe, M.; Wisniewski, J. P.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal
Volume:798
Issue / Number:2
Start Page:id. 132 (17 pp)
Audience:Not Specified
Abstract / Description: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 a ~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 μm 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 10-8.5 M yr-1, 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. Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
Free Keywords:instrumentation: adaptive optics; instrumentation: polarimeters; planets and satellites: formation; protoplanetary disks
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X
URL:http://cdsads.u-strasbg.fr/abs/2015ApJ...798..132F
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