About
Contact
Help
Sending publications
How to publish
Advanced Search
View Item 
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse byCommunities and CollectionsDateAuthorsTitlesSubjectsThis CollectionDateAuthorsTitlesSubjects

My Account

Login to my accountRegister
Biblioteca Digital - Universidad de Chile
Revistas Chilenas
Repositorios Latinoamericanos
Tesis LatinoAmericanas
Tesis chilenas
Related linksRegistry of Open Access RepositoriesOpenDOARGoogle scholarCOREBASE
My Account
Login to my accountRegister

Spiral Arms in the Disk of HD 142527 from CO Emission Lines with ALMA

Artículo
Thumbnail
Open/Download
IconSPIRAL-ARMS-IN-THE-DISK-OF-HD142527.pdf (1.111Mb)
Publication date
2014-04-10
Metadata
Show full item record
Cómo citar
Christiaens, Valentin
Cómo citar
Spiral Arms in the Disk of HD 142527 from CO Emission Lines with ALMA
.
Copiar
Cerrar

Author
  • Christiaens, Valentin;
  • Casassus Montero, Simón;
  • Pérez, Sebastián;
  • Van der Plas, Gerrit;
  • Ménard, Francois;
Abstract
In view of both the size of its gap and the previously reported asymmetries and near-infrared spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. This paper focuses on the morphology of the outer disk through ALMA observations of 12CO J = 2–1, 12CO J = 3–2, and 13CO J = 2–1. Both 12CO J = 2–1 and 12CO J = 3–2 show spiral features of different sizes. The innermost spiral arm (S1) is a radio counterpart of the first near-infrared spiral observed by Fukagawa, but it is shifted radially outward. However, the most conspicuous CO spiral arm (S2) lies at the outskirts of the disk and has not been detected before. It corresponds to a cold density structure, with both brightness and excitation temperatures of order 13±2 K and conspicuous in the 12CO J = 2–1 peak-intensity map, but faint in 12CO J = 3–2. There is also a faint counterarm (S3), at a point-symmetric location of S2 with respect to the star. These three spirals are modeled separately with two different formulae that approximate the loci of density maxima in acoustic waves due to embedded planets. S1 could be fit relatively well with these formulae, compared to S2 and S3. Alternative scenarios such as gravitational instability or external tidal interaction are discussed. The impact of channelization on spectrally and spatially resolved peak intensity maps is also briefly addressed.
General note
Artículo de publicación ISI
Identifier
URI: https://repositorio.uchile.cl/handle/2250/126484
DOI: doi:10.1088/2041-8205/785/1/L12
Quote Item
The Astrophysical Journal Letters, 785:L12 (5pp), 2014 April 10
Collections
  • Artículos de revistas
xmlui.footer.title
31 participating institutions
More than 73,000 publications
More than 110,000 topics
More than 75,000 authors
Published in the repository
  • How to publish
  • Definitions
  • Copyright
  • Frequent questions
Documents
  • Dating Guide
  • Thesis authorization
  • Document authorization
  • How to prepare a thesis (PDF)
Services
  • Digital library
  • Chilean academic journals portal
  • Latin American Repository Network
  • Latin American theses
  • Chilean theses
Dirección de Servicios de Información y Bibliotecas (SISIB)
Universidad de Chile

© 2020 DSpace
  • Access my account