Título

UNCOVERING THE DEEPLY EMBEDDED ACTIVE GALACTIC NUCLEUS ACTIVITY IN THENUCLEAR REGIONS OF THE INTERACTING GALAXY Arp 299

Autor

Itziar Aretxaga

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

Galaxies: individual (Arp 299, IC 694, NGC 3690) - (INSPEC) Galaxies: nuclei - (INSPEC) Galaxies: Seyfert - (INSPEC) Infrared: galaxies - (INSPEC) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) ASTRONOMÍA Y ASTROFÍSICA - (CTI) ASTRONOMÍA Y ASTROFÍSICA - (CTI)

Resumen o descripción

We present mid-infrared (MIR) 8–13μm spectroscopy of the nuclear regions of the interacting galaxy Arp 299(IC 694+NGC 3690) obtained with CanariCam (CC) on the 10.4 m Gran Telescopio Canarias (GTC). The highangular resolution (∼0”.3–0”.6) of the data allows us to probe nuclear physical scales between 60 and 120 pc,which is a factor of 10 improvement over previous MIR spectroscopic observations ofthis system. The GTC/CCspectroscopy displays evidence of deeply embedded active galactic nucleus (AGN) activity in both nuclei. The GTC/CC nuclear spectrum of NGC 3690/Arp 299-B1 can be explained as emission from AGN-heated dustin a clumpy torus with both a high covering factor and high extinction along the line of sight. The estimatedbolometric luminosity of the AGN in NGC 3690 is 3.2 ± 0.6 × 10⁴⁴ erg s⁻¹. The nuclear GTC/CC spectrum ofIC 694/Arp 299-A shows 11.3μm polycyclic aromatic hydrocarbon emission stemming from a deeply embedded (Av∼ 24 mag) region of less than 120 pc in size. There is also a continuum-emitting dust component. If associatedwith the putative AGN in IC 694, we estimate that it would be approximately five times less luminous than the AGN in NGC 3690. The presence of dual AGN activity makes Arp 299 a good example to study such phenomena in the early coalescence phase of interacting galaxies.

Editor

The American Astronomical Society

Fecha de publicación

10 de diciembre de 2013

Tipo de publicación

Artículo

Versión de la publicación

Versión aceptada

Recurso de información

http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2218

Formato

application/pdf

Idioma

Inglés

Audiencia

Estudiantes

Investigadores

Público en general

Sugerencia de citación

Alonso-Herrero, A., et al., (2013). UNCOVERING THE DEEPLY EMBEDDED ACTIVE GALACTIC NUCLEUS ACTIVITY IN THE NUCLEAR REGIONS OF THE INTERACTING GALAXY Arp 299, The Astrophysical Journal Letters, Vol. 779(L14):1-5

Repositorio Orígen

Repositorio Institucional del INAOE

Descargas

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