|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE | | C. Perrot
; A. Boccaletti
; E. Pantin
; J-C. Augereau
; A-M. Lagrange
; R. Galicher
; A-L. Maire
; J. Mazoyer
; J. Milli
; G. Rousset
; R. Gratton
; M. Bonnefoy
; W. Brandner
; E. Buenzli
; M. Langlois
; J. Lannier
; D. Mesa
; S. Peretti
; G. Salter
; E. Sissa
; G. Chauvin
; S. Desidera
; M. Feldt
; A. Vigan
; E. Di Folco
; A. Dutrey
; J. Péricaud
; P. Baudoz
; M. Benisty
; J. De Boer
; A. Garufi
; J. H. Girard
; F. Menard
; J. Olofsson
; S. P. Quanz
; D. Mouillet
; V. Christiaens
; S. Casassus
; J.-L. Beuzit
; P. Blanchard
; M. Carle
; T. Fusco
; E. Giro
; N. Hubin
; D. Maurel
; O. Moeller-Nilsson
; A. Sevin
; L. Weber
; | | Date: |
2 May 2016 | | Abstract: | Transition disks correspond to a short stage between the young protoplanetary
phase and older debris phase. Along this evolutionary sequence, the gas
component disappears leaving room for a dust-dominated environment where
already-formed planets signpost their gravitational perturbations. We endeavor
to study the very inner region of the well-known and complex debris, but still
gas-rich disk, around HD 141569A using the exquisite high-contrast capability
of SPHERE at the VLT. Recent near-infrared (IR) images suggest a relatively
depleted cavity within ~200 au, while former mid-IR data indicate the presence
of dust at separations shorter than ~100 au. We obtained multi-wavelength
images in the near-IR in J, H2, H3 and Ks bands with the IRDIS camera and a
0.95-1.35 micrometers spectral data cube with the IFS. Data were acquired in
pupil-tracking mode, thus allowing for angular differential imaging. We
discovered several new structures inside 1", of which the most prominent is a
bright ring with sharp edges (semi-major axis: 0.4") featuring a strong
north-south brightness asymmetry. Other faint structures are also detected from
0.4" to 1" in the form of concentric ringlets and at least one spiral arm.
Finally, the VISIR data at 8.6 micrometers suggests the presence of an
additional dust population closer in. Besides, we do not detect companions more
massive than 1-3 mass of Jupiter. The performance of SPHERE allows us to
resolve the extended dust component, which was previously detected at thermal
and visible wavelengths, into very complex patterns with strong asymmetries ;
the nature of these asymmetries remains to be understood. Scenarios involving
shepherding by planets or dust-gas interactions will have to be tested against
these observations. | | Source: | arXiv, 1605.0468 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER