English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/135393
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Corrugated velocity patterns in the spiral galaxies: NGC 278, NGC 1058, NGC 2500 & UGC 3574

AuthorsCarmen Sánchez-Gil, M.; Alfaro, Emilio J. ; Pérez Jiménez, Enrique
KeywordsGalaxies: star formation
Stars: kinematics and dynamics
Instrumentation: spectrographs
Galaxies: spiral
Issue Date2015
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 454(4): 3376- 3390 (2015)
AbstractWe address the study of the H α vertical velocity field in a sample of four nearly face-on galaxies using long-slit spectroscopy taken with the Intermediate dispersion Spectrograph and Imaging System (ISIS), attached to the William Herschel Telescope (WHT) at the Roque de los Muchachos Observatory (Spain). The spatial structure of the velocity vertical component shows a radial corrugated pattern with spatial scales higher or within the order of 1 kpc. The gas is mainly ionized by high-energy photons: only in some locations of NGC 278 and NGC 1058 is there some evidence of ionization by low-velocity shocks, which, in the case of NGC 278, could be due to minor mergers. The behaviour of the gas in the neighbourhood of the spiral arms fits, in the majority of the observed cases, with that predicted by the so-called hydraulic bore mechanism, where a thick magnetized disc encounters a spiral density perturbation. The results obtained show that it is difficult to explain the H α large-scale velocity field without the presence of a magnetized, thick galactic disc. Larger samples and spatial covering of the galaxy discs are needed to provide further insight into this problem.
URIhttp://hdl.handle.net/10261/135393
DOI10.1093/mnras/stv2206
Identifiersdoi: 10.1093/mnras/stv2206
issn: 1365-2966
Appears in Collections:(IAA) Artículos
Files in This Item:
File Description SizeFormat 
IAA_2015-MNRAS_Alfaro.pdf4,19 MBAdobe PDFThumbnail
View/Open
Show full item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.