English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Interstellar Plunging Waves: ALMA resolves the physical structure of nonstationary MHD shocks

Cosentino, G., Jiménez-Serra, I., Caselli, P., Henshaw, J. D., Barnes, A. T., Tan, J. C., et al. (2019). Interstellar Plunging Waves: ALMA resolves the physical structure of nonstationary MHD shocks. The Astrophysical Journal Letters, 881(2): L42. doi:10.3847/2041-8213/ab38c5.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-397B-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-397C-1
Genre: Journal Article

Files

show Files
hide Files
:
Interstellar Plunging Waves ALMA Resolves the Physical Structure of Nonstationary.pdf (Any fulltext), 951KB
 
File Permalink:
-
Name:
Interstellar Plunging Waves ALMA Resolves the Physical Structure of Nonstationary.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Cosentino, Giuliana, Author
Jiménez-Serra, Izaskun, Author
Caselli, Paola1, Author              
Henshaw, Jonathan D., Author
Barnes, Ashley T., Author
Tan, Jonathan C., Author
Viti, Serena, Author
Fontani, Francesco, Author
Wu, Benjamin, Author
Affiliations:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

Content

show
hide
Free keywords: -
 Abstract: Magnetohydrodynamic (MHD) shocks are violent events that inject large amounts of energy in the interstellar medium dramatically modifying its physical properties and chemical composition. Indirect evidence for the presence of such shocks has been reported from the especial chemistry detected toward a variety of astrophysical shocked environments. However, the internal physical structure of these shocks remains unresolved since their expected spatial scales are too small to be measured with current instrumentation. Here we report the first detection of a fully spatially resolved, MHD shock toward the infrared dark cloud (IRDC) G034.77-00.55. The shock, probed by silicon monoxide (SiO) and observed with the Atacama Large Millimeter/submillimeter Array (ALMA), is associated with the collision between the dense molecular gas of the cloud and a molecular gas flow pushed toward the IRDC by the nearby supernova remnant (SNR) W44. The interaction is occurring on subparsec spatial scales thanks to the enhanced magnetic field of the SNR, making the dissipation region of the MHD shock large enough to be resolved with ALMA. Our observations suggest that molecular flow–flow collisions can be triggered by stellar feedback, inducing shocked molecular gas densities compatible with those required for massive star formation.

Details

show
hide
Language(s):
 Dates: 2019-08-21
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.3847/2041-8213/ab38c5
Other: LOCALID: 3177233
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 881 (2) Sequence Number: L42 Start / End Page: - Identifier: ISSN: 2041-8205
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215