Bibcode
Esparza-Arredondo, D.; González-Martín, Omaira; Dultzin, Deborah; Alonso-Herrero, Almudena; Ramos Almeida, C.; Díaz-Santos, Tanio; García-Bernete, I.; Martinez-Paredes, Mariela; Rodríguez-Espinosa, J. M.
Referencia bibliográfica
The Astrophysical Journal, Volume 859, Issue 2, article id. 124, 33 pp. (2018).
Fecha de publicación:
6
2018
Revista
Número de citas
21
Número de citas referidas
20
Descripción
We studied the circumnuclear mid-IR emission in a sample of 19 local
active galactic nuclei (AGNs) with high spatial resolution spectra using
T-ReCS (Gemini) and CanariCam (GTC), together with Spitzer/IRS
observations. We measured the flux and the equivalent width for the 11.3
μm PAH feature and the [S IV] line emission as a function of
galactocentric distance. This allowed us to study the star formation
(SF) at subkiloparsec scales from the nucleus for a large sample of
nearby AGNs. The [S IV] line emission could be tracing the AGN radiation
field within a few thousand times the sublimation radius (R
sub), but it often peaks at distances greater than 1000 R
sub. One possibility is that the SF is contributing to the [S
IV] total flux. We found an 11.3 μm PAH emission deficit within the
inner few tens of parsecs from the AGN. This deficit might be due to the
destruction of the molecules responsible for this feature or the lack of
SF at these distances. We found a sensible agreement in the expected
shift of the relation of the AGN bolometric luminosity and the SF rate.
This indicates that numerical models attributing the link between AGN
activity and host galaxy growth to mergers are in agreement with our
data, for most inner galaxy parts.
Proyectos relacionados
Actividad Nuclear en Galaxias: una Perspectiva 3D del Núcleo y su Entorno
Nuestro proyecto puede dividirse en dos líneas principales de investigación. En primer lugar, el estudio de los vientos producidos por cuásares luminosos oscurecidos y del impacto que estos tienen en sus galaxias anfitrionas (retroalimentación del AGN). Para ello hemos obtenido observaciones infrarrojas y ópticas con los instrumentos del Gran
Cristina
Ramos Almeida