2016A&A...593L..20K


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.25CEST11:29:13

2016A&A...593L..20K - Astronomy and Astrophysics, volume 593, L20-20 (2016/9-1)

Spirals in protoplanetary disks from photon travel time.

KAMA M., PINILLA P. and HEAYS A.N.

Abstract (from CDS):

Spiral structures are a common feature in scattered-light images of protoplanetary disks, and of great interest as possible tracers of the presence of planets. However, other mechanisms have been put forward to explain them, including self-gravity, disk-envelope interactions, and dead zone boundaries. These mechanisms explain many spirals very well, but are unable to easily account for very loosely wound spirals and single spiral arms. We study the effect of light travel time on the shape of a shadow cast by a clump orbiting close (within ∼1au) of the central star, where there can be significant orbital motion during the light travel time from the clump to the outer disk and then to the sky plane. This delay in light rays reaching the sky plane gives rise to a variety of spiral- and arc-shaped shadows, which we describe with a general fitting formula for a flared, inclined disk.

Abstract Copyright: © ESO, 2016

Journal keyword(s): scattering - methods: observational - protoplanetary disks

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* AA Tau Or* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 655 0
2 NGC 2264 OpC 06 40 58 +09 53.7           ~ 1633 0
3 CPD-36 6759 Y*O 15 15 48.4459023859 -37 09 16.026315179   9.21 8.708     F8V 381 1
4 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 873 0

    Equat.    Gal    SGal    Ecl

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2021.06.25-11:29:13

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