2019ApJ...882...64R

Query : 2019ApJ...882...64R

2019ApJ...882...64R - Astrophys. J., 882, 64-64 (2019/September-1)

An exo-Kuiper Belt with an extended halo around HD 191089 in scattered light.

REN B., CHOQUET E., PERRIN M.D., DUCHENE G., DEBES J.H., PUEYO L., RICE M., CHEN C., SCHNEIDER G., ESPOSITO T.M., POTEET C.A., WANG J.J., AMMONS S.M., ANSDELL M., ARRIAGA P., BAILEY V.P., BARMAN T., BRUZZONE J.S., BULGER J., CHILCOTE J., COTTEN T., DE ROSA R.J., DOYON R., FITZGERALD M.P., FOLLETTE K.B., GOODSELL S.J., GERARD B.L., GRAHAM J.R., GREENBAUM A.Z., HAGAN J.B., HIBON P., HINES D.C., HUNG L.-W., INGRAHAM P., KALAS P., KONOPACKY Q., LARKIN J.E., MACINTOSH B., MAIRE J., MARCHIS F., MAROIS C., MAZOYER J., MENARD F., METCHEV S., MILLAR-BLANCHAER M.A., MITTAL T., MOERCHEN M., NIELSEN E.L., N'DIAYE M., OPPENHEIMER R., PALMER D., PATIENCE J., PINTE C., POYNEER L., RAJAN A., RAMEAU J., RANTAKYRO F.T., RUFFIO J.-B., RYAN D., SAVRANSKY D., SCHNEIDER A.C., SIVARAMAKRISHNAN A., SONG I., SOUMMER R., STARK C., THOMAS S., VIGAN A., WALLACE J.K., WARD-DUONG K., WIKTOROWICZ S., WOLFF S., YGOUF M. and NORMAN C.

Abstract (from CDS):

We have obtained Hubble Space Telescope STIS and NICMOS and Gemini/GPI scattered-light images of the HD 191089 debris disk. We identify two spatial components: a ring resembling the Kuiper Belt in radial extent (FWHM ∼ 25 au, centered at ∼46 au) and a halo extending to ∼640 au. We find that the halo is significantly bluer than the ring, consistent with the scenario that the ring serves as the "birth ring" for the smaller dust in the halo. We measure the scattering phase functions in the 30°-150° scattering-angle range and find that the halo dust is more forward- and backward-scattering than the ring dust. We measure a surface density power-law index of -0.68 ± 0.04 for the halo, which indicates the slowdown of the radial outward motion of the dust. Using radiative transfer modeling, we attempt to simultaneously reproduce the (visible) total and (near-infrared) polarized intensity images of the birth ring. Our modeling leads to mutually inconsistent results, indicating that more complex models, such as the inclusion of more realistic aggregate particles, are needed.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): protoplanetary disks - radiative transfer - stars: imaging - stars: individual: HD 191089 - techniques: image processing

Simbad objects: 9

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Number of rows : 9
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 * 49 Cet PM* 01 34 37.7786780856 -15 40 34.898673000   5.667 5.607   5.54 A1V 348 0
2 HD 35841 * 05 26 36.5868254712 -22 29 23.735043744   9.37 8.90     F3V 54 0
3 HD 36112 Ae* 05 30 27.5285630040 +25 19 57.076288752   8.57 8.27     A8Ve 551 0
4 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
5 CPD-68 1894 TT* 13 22 07.5421944624 -69 38 12.219391716   11.38 10.393   9.117 K1Ve 203 0
6 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
7 HD 181327 PM* 19 22 58.9437222504 -54 32 16.975668624   7.50 7.04   6.49 F6V 331 0
8 HD 191089 SB? 20 09 05.2156358688 -26 13 26.520165768   7.62 7.18     F5V 177 0
9 HD 196081 PM* 20 35 54.4765970400 -26 46 24.292850880   7.58 7.20     F5V 37 0

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