Kinematics of Arp 270: gas flows, nuclear activity and two regimes of star formation

Bibcode
2013MNRAS.432..998Z
DOI
10.1093/mnras/stt527
Zaragoza-Cardiel, J.; Font-Serra, J.; Beckman, J. E.; Blasco-Herrera, J.; García-Lorenzo, B.; Camps, A.; González-Martín, O.; Ramos-Almeida, C.; Loiseau, N.; Gutiérrez, L.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society, Volume 432, Issue 2, p.998-1009

Fecha de publicación:
6
2013
Revista
Monthly Notices of the Royal Astronomical Society
Número de autores
10
Número de autores del IAC
7
Número de citas
13
Número de citas referidas
12
Descripción
We have observed the Arp 270 system (NGC 3395 and NGC 3396) in Hα emission using the Galaxy Hα Fabry-Perot spectrometer on the 4.2 m William Herschel Telescope (La Palma). In NGC 3396, which is edge-on to us, we detect gas inflow towards the centre, and also axially confined opposed outflows, characteristic of galactic superwinds, and we go on to examine the possibility that there is a shrouded AGN in the nucleus. The combination of surface brightness, velocity and velocity dispersion information enabled us to measure the radii, FWHM, and the masses of 108 H II regions in both galaxies. We find two distinct modes of physical behaviour, for high and lower luminosity regions. We note that the most luminous regions show especially high values for their velocity dispersions and hypothesize that these occur because the higher luminosity regions form from higher mass, gravitationally bound clouds while those at lower luminosity H II regions form within molecular clouds of lower mass, which are pressure confined.
Proyectos relacionados
Poster Almeria Astronomy week
Estudios Cinemáticos, Estructurales y de Composición, de los Medios Interestelares e Intergalácticos

El objetivo básico del proyecto es investigar la evolución de las galaxias mediante el entendimiento de la interacción del medio interestelar y las estrellas. La técnica principal que utilizamos es la cinemática bidimensional de galaxias enteras observada por nuestro instrumento GHaFaS, un interferometro Fabry Perot en el telescopio William

Prof.
John E. Beckman
En ejecución
Imagen del Proyecto
Grupo de Estudios de Formación Estelar GEFE

El proyecto interno GEFE está enmarcado en el proyecto coordinado, ESTALLIDOS, financiado por el plan nacional desde el año 2001. El ultimo proyecto aprobado es ESTALLIDOS 6.0 (AYA2016- 79724-C4-2-P). En el proyecto GEFE trabajamos en base al caso científico del proyecto ESTALLIDOS 6.0. Los estallidos de formación estelar (Starbursts o SB) son

Casiana
Muñoz Tuñón
En ejecución
Tipo
Con árbitro
Regiones H II
Galaxias
Formación y Evolución de Galaxias (FYEG)

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