| | |
| | |
Stat |
Members: 3643 Articles: 2'479'597 Articles rated: 2609
19 March 2024 |
|
| | | |
|
Article overview
| |
|
Radio continuum observations of the Virgo cluster spiral NGC 4522 The signature of ram pressure | B. Vollmer
; R. Beck
; J.D.P. Kenney
; J.H. van Gorkom
; | Date: |
2 Mar 2004 | Subject: | astro-ph | Affiliation: | 1,2), R. Beck , J.D.P. Kenney , J.H. van Gorkom ( CDS, Observatoire astronomique de Strasbourg, France, MPI fuer Radioastronomie, Bonn, Germany, Yale University, New Haven, USA, Columbia University, New York, USA | Abstract: | Radio continuum observations at 20 and 6 cm of the highly inclined Virgo spiral galaxy NGC 4522 are presented. Both, 20 and 6 cm total emission distributions are asymmetric with an extended component to the west where extraplanar atomic gas and Halpha emission are found. The 6 cm polarized emission is located at the eastern edge of the galactic disk. Its peak is located about 1 kpc to the east of the total emission peak. We argue that this phenomena is a characteristic feature for cluster galaxies which are experiencing significant pressure from the intracluster medium. The degree of polarization decreases from the east to the west. The flattest spectral index between 20 and 6 cm coincides with the peak of the 6 cm polarized emission. These findings are consistent with a picture of a large scale shock due to ram pressure located at the east of the galaxy where cosmic rays are accelerated. We conclude that it is likely that the galaxy experiences active ram pressure. | Source: | arXiv, astro-ph/0403054 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
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
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |