2015ApJ...806L..10D

Query : 2015ApJ...806L..10D

2015ApJ...806L..10D - Astrophys. J., 806, L10 (2015/June-2)

Near-IR high-resolution imaging polarimetry of the SU Aur disk: clues for tidal tails?

DE LEON J., TAKAMI M., KARR J.L., HASHIMOTO J., KUDO T., SITKO M., MAYAMA S., KUSAKABE N., AKIYAMA E., LIU H.B., USUDA T., ABE L., BRANDNER W., BRANDT T.D., CARSON J., CURRIE T., EGNER S.E., FELDT M., FOLLETTE K., GRADY C.A., GOTO M., GUYON O., HAYANO Y., HAYASHI M., HAYASHI S., HENNING T., HODAPP K.W., ISHII M., IYE M., JANSON M., KANDORI R., KNAPP G.R., KUZUHARA M., KWON J., MATSUO T., McELWAIN M.W., 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. and TAMURA M.

Abstract (from CDS):

We present new high-resolution H-band imaging observations of the circumstellar disk around the T Tauri star SU Aur. Our observations with Subaru-HiCIAO have revealed the presence of scattered light as close as 0." 15 (Å20 AU) to the star. Within our image, we identify bright emission associated with a disk with a minimum radius of Å90 AU, an inclination of Å35° from the plane of the sky, and an approximate PA of for the major axis. We find a brightness asymmetry between the northern and southern sides of the disk due to a non-axisymmetric disk structure. We also identify a pair of asymmetric tail structures extending east and west from the disk. The western tail extends at least 2." 5 (350 AU) from the star, and is probably associated with a reflection nebula previously observed at optical and near-IR wavelengths. The eastern tail extends at least 1" (140 AU) at the present signal-to-noise. These tails are likely due to an encounter with an unseen brown dwarf, but our results do not exclude the explanation that these tails are outflow cavities or jets.

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Journal keyword(s): polarization - protoplanetary disks - stars: individual: SU Aur - stars: pre-main sequence

Simbad objects: 14

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Number of rows : 14
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* RY Tau TT* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 744 1
2 V* UX Tau A TT* 04 30 03.9932216088 +18 13 49.469925504   12.92 11.15     K2Ve 386 0
3 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1176 2
4 V* SU Aur Or* 04 55 59.3866872552 +30 34 01.499608092   10.33 9.30 9.17   G2IIIne 628 0
5 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 612 0
6 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 816 0
7 HD 36112 Ae* 05 30 27.5285630040 +25 19 57.076288752   8.57 8.27     A8Ve 551 0
8 V* Z CMa Ae* 07 03 43.1599411656 -11 33 06.209065836 10.51 9.99 8.80     B5/8eq+F5/7 601 3
9 CD-40 8434 TT* 14 08 10.1545500744 -41 23 52.573291080   13.42 12.18 11.71 10.506 K7IVe 546 0
10 HD 133218 * 15 04 28.7336392920 -36 50 46.523921352   10.77 10.25     F2V 9 0
11 HD 135344B Or* 15 15 48.4460065200 -37 09 16.024369824   9.21 8.708     F8V 548 0
12 ATO J241.0901-21.5080 Or* 16 04 21.6547947840 -21 30 28.550063304   13.3       K2 190 0
13 EM* SR 21A TT* 16 27 10.2778380120 -24 19 12.622467720   16.08 14.10     G1 293 1
14 IRAS 16245-2423 TT* 16 27 37.1906433768 -24 30 35.025246828       16.66 14.67 B5-F2 376 0

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