English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Mapping electron temperature variations across a spiral arm in NGC 1672

Ho, I.-T., Kreckel, K., Meidt, S. E., Groves, B., Blanc, G. A., Bigiel, F., et al. (2019). Mapping electron temperature variations across a spiral arm in NGC 1672. The Astrophysical Journal Letters, 885(2): L31. doi:10.3847/2041-8213/ab4feb.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
Mapping Electron Temperature Variations across a Spiral Arm in NGC 1672.pdf (Any fulltext), 5MB
 
File Permalink:
-
Name:
Mapping Electron Temperature Variations across a Spiral Arm in NGC 1672.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Ho, I-Ting, Author
Kreckel, Kathryn, Author
Meidt, Sharon E., Author
Groves, Brent, Author
Blanc, Guillermo A., Author
Bigiel, Frank, Author
Dale, Daniel A., Author
Emsellem, Eric, Author
Glover, Simon C. O., Author
Grasha, Kathryn, Author
Kewley, Lisa J., Author
Kruijssen, J. M. Diederik, Author
Lang, Philipp, Author
McElroy, Rebecca, Author
Kudritzki, Rolf-Peter, Author
Sanchez-Blazquez, Patricia, Author
Sandstrom, Karin, Author
Santoro, Francesco, Author
Schinnerer, Eva, Author
Schruba, Andreas1, Author              
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

Content

show
hide
Free keywords: -
 Abstract: We report one of the first extragalactic observations of electron temperature variations across a spiral arm. Using Multi Unit Spectroscopic Explorer mosaic observations of the nearby galaxy NGC 1672, we measure the [N ii]λ5755 auroral line in a sample of 80 H ii regions in the eastern spiral arm of NGC 1672. We discover systematic temperature variations as a function of distance perpendicular to the spiral arm. The electron temperature is lowest on the spiral arm itself and highest on the downstream side. Photoionization models of different metallicity, pressure, and age of the ionizing source are explored to understand what properties of the interstellar medium drive the observed temperature variations. An azimuthally varying metallicity appears to be the most likely cause of the temperature variations. The electron temperature measurements solidify recent discoveries of azimuthal variations of oxygen abundance based on strong lines, and rule out the possibility that the abundance variations are artifacts of the strong-line calibrations.

Details

show
hide
Language(s):
 Dates: 2019-11-06
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3847/2041-8213/ab4feb
Other: LOCALID: 3188177
 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: 885 (2) Sequence Number: L31 Start / End Page: - Identifier: ISSN: 2041-8205
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215