English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Substructures in the Keplerian disc around the O-type (proto-)star G17.64+0.16

Maud, L. T., Cesaroni, R., Kumar, M. S. N., Rivilla, V. M., Ginsburg, A., Klaassen, P. D., et al. (2019). Substructures in the Keplerian disc around the O-type (proto-)star G17.64+0.16. Astronomy and Astrophysics, 627: L6. doi:10.1051/0004-6361/201935633.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-6314-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-6315-5
Genre: Journal Article

Files

show Files
hide Files
:
Substructures in the Keplerian disc around the O-type (proto-)star G17.64+0.16.pdf (Any fulltext), 5MB
 
File Permalink:
-
Name:
Substructures in the Keplerian disc around the O-type (proto-)star G17.64+0.16.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Maud, L. T., Author
Cesaroni, R., Author
Kumar, M. S. N., Author
Rivilla, V. M., Author
Ginsburg, A., Author
Klaassen, P. D., Author
Harsono, D., Author
Sánchez-Monge, Á., Author
Ahmadi, A., Author
Allen, V., Author
Beltrán, M. T., Author
Beuther, H., Author
Galván-Madrid, R., Author
Goddi, C., Author
Hoare, M. G., Author
Hogerheijde, M. R., Author
Johnston, K. G., Author
Kuiper, R., Author
Moscadelli, L., Author
Peters, T.1, Author              
Testi, L., Authorvan der Tak, F. F. S., Authorde Wit, W. J., Author more..
Affiliations:
1Cosmology, MPI for Astrophysics, Max Planck Society, ou_159876              

Content

show
hide
Free keywords: -
 Abstract: We present the highest angular resolution (∼20 × 15 mas–44 × 33 au) Atacama Large Millimeter/sub-millimeter Array (ALMA) observations that are currently possible of the proto-O-star G17.64+0.16 in Band 6. The Cycle 5 observations with baselines out to 16 km probe scales < 50 au and reveal the rotating disc around G17.64+0.16, a massive forming O-type star. The disc has a ring-like enhancement in the dust emission that is especially visible as arc structures to the north and south. The Keplerian kinematics are most prominently seen in the vibrationally excited water line, H2O 55, 0−64, 3 ν2 = 1 (Eu = 3461.9 K). The mass of the central source found by modelling the Keplerian rotation is consistent with 45 ± 10 M⊙. The H30α (231.9 GHz) radio-recombination line and the SiO (5-4) molecular line were detected at up to the ∼10σ level. The estimated disc mass is 0.6 − 2.6 M⊙ under the optically thin assumption. Analysis of the Toomre Q parameter in the optically thin regime indicates that the disc stability is highly dependent on temperature. The disc currently appears stable for temperatures > 150 K; this does not preclude that the substructures formed earlier through disc fragmentation.

Details

show
hide
Language(s):
 Dates: 2019-06-09
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1051/0004-6361/201935633
Other: LOCALID: 3150025
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 627 Sequence Number: L6 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1