2015ApJ...803L..10R


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET21:16:44

2015ApJ...803L..10R - Astrophys. J., 803, L10 (2015/April-2)

Scattered light from dust in the cavity of the V4046 Sgr transition disk.

RAPSON V.A., KASTNER J.H., ANDREWS S.M., HINES D.C., MACINTOSH B., MILLAR-BLANCHAER M. and TAMURA M.

Abstract (from CDS):

We report the presence of scattered light from dust grains located in the giant planet formation region of the circumbinary disk orbiting the ∼20 Myr old close (∼0.045 AU separation) binary system V4046 Sgr AB based on observations with the new Gemini Planet Imager (GPI) instrument. These GPI images probe to within ∼7 AU of the central binary with a linear spatial resolution of ∼3 AU, and are therefore capable of revealing the dust disk structure within a region corresponding to the giant planets in our solar system. GPI imaging reveals a relatively narrow (FWHM ∼ 10 AU) ring of polarized near-infrared flux whose brightness peaks at ∼14 AU. This ∼14 AU radius ring is surrounded by a fainter outer halo of scattered light extending to ∼45 AU, which coincides with previously detected millimeter-wave thermal dust emission. The presence of small grains that efficiently scatter starlight well inside the millimeter-wavelength disk cavity supports current models of planet formation which suggest that planet-disk interactions can generate pressure traps that impose strong radial variations in the particle size distribution throughout the disk.

Abstract Copyright:

Journal keyword(s): circumstellar matter - polarization - stars: individual: V4046 Sgr - stars: pre-main sequence

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 CPD-36 6759 Y*O 15 15 48.4459023859 -37 09 16.026315179   9.21 8.708     F8V 339 1
2 HD 319139 BY* 18 14 10.4818974563 -32 47 34.516106830   11.47 10.68   9.11 K5+K7 280 0

    Equat.    Gal    SGal    Ecl

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2020.01.29-21:16:44

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