2015ApJ...798..132F

Query : 2015ApJ...798..132F

2015ApJ...798..132F - Astrophys. J., 798, 132 (2015/January-2)

SEEDS adaptive optics imaging of the asymmetric transition disk Oph IRS 48 in scattered light.

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. and TAMURA M.

Abstract (from CDS):

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, 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.

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Journal keyword(s): instrumentation: adaptive optics - instrumentation: polarimeters - planets and satellites: formation - protoplanetary disks

Simbad objects: 7

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Number of rows : 7

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	V* V1213 Tau	Or*	04 31 37.5055489536	+18 12 24.383952396						K7	605	0
2	HD 135344	Or*	15 15 48.9462675744	-37 08 55.731368400		7.84	7.76			A0V	155	1
3	M 5	GlC	15 18 33.22	+02 04 51.7			5.95			~	2095	0
4	HD 145127	*	16 10 09.8786833224	-24 34 56.713510524		6.66	6.64			A0V	48	0
5	* rho Oph	**	16 25 35.11766	-23 26 49.8150	4.30	4.85	4.63	4.27	3.96	B2IV+B2V	670	0
6	IRAS 16245-2423	TT*	16 27 37.1906433768	-24 30 35.025246828				16.66	14.67	B5-F2	376	0
7	HD 148835	SB*	16 31 50.7288384432	-26 24 52.501739940		11.35	10.07			K0/1(III)	6	0

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