Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » 1612.7320

 Article overview


First scattered-light images of the gas-rich debris disk around 49 Ceti
É. Choquet ; J. Milli ; Z. Wahhaj ; R. Soummer ; A. Roberge ; J.-C. Augereau ; M. Booth ; O. Absil ; A. Boccaletti ; C. H. Chen ; J. H. Debes ; C. del Burgo ; W. R. F. Dent ; S. Ertel ; J. H. Girard ; E. Gofas-Salas ; D. A. Golimowski ; C. A. Gómez González ; J. B. Hagan ; P. Hibon ; D. C. Hines ; G. M. Kennedy ; A.-M. Lagrange ; L. Matrà ; D. Mawet ; D. Mouillet ; M. N'Diaye ; M. D. Perrin ; C. Pinte ; L. Pueyo ; A. Rajan ; G. Schneider ; S. Wolff ; M. Wyatt ;
Date 21 Dec 2016
AbstractWe present the first scattered-light images of the debris disk around 49 ceti, a ~40 Myr A1 main sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and molecular gas. The outer disk is revealed in reprocessed archival Hubble Space Telescope NICMOS F110W images, as well as new coronagraphic H band images from the Very Large Telescope SPHERE instrument. The disk extends from 1.1" (65 AU) to 4.6" (250 AU), and is seen at an inclination of 73degr, which refines previous measurements at lower angular resolution. We also report no companion detection larger than 3 M_Jup at projected separations beyond 20 AU from the star (0.34"). Comparison between the F110W and H-band images is consistent with a grey color of 49 ceti’s dust, indicating grains larger than >2microns. Our photometric measurements indicate a scattering efficiency / infrared excess ratio of 0.2-0.4, relatively low compared to other characterized debris disks. We find that 49 ceti presents morphological and scattering properties very similar to the gas-rich HD 131835 system. From our constraint on the disk inclination we find that the atomic gas previously detected in absorption must extend to the inner disk, and that the latter must be depleted of CO gas. Building on previous studies, we propose a schematic view of the system describing the dust and gas structure around 49 ceti and hypothetic scenarios for the gas nature and origin.
Source arXiv, 1612.7320
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  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 claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica