The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245

Autor: Patrick F. Roche, I. Valtchanov, Omaira González-Martín, N. A. Levenson, J. A. Acosta-Pulido, A. Alonso-Herrero, C. Ramos Almeida, Tanio Díaz-Santos, Miguel Pereira-Santaella, S. Fisher, I. García-Bernete, Maite Castillo, A. M. Pérez García, Chris Packham, Mirjana Pović, P. Esquej, M. Sánchez-Portal
Přispěvatelé: Ministerio de Ciencia e Innovación (España), La Caixa, Consejo Nacional de Ciencia y Tecnología (México), Ministerio de Economía y Competitividad (España), European Commission
Rok vydání: 2015
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Galaxies: individual: NGC 2993
Active galactic nucleus
Galaxies: individual: NGC 2992
active [Galaxies]
Radio galaxy
Astrophysics::High Energy Astrophysical Phenomena
Megamaser
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
individual: NGC 2992 [Galaxies]
Hubble sequence
symbols.namesake
galaxies [Infrared]
Spitzer Space Telescope
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Galaxy Astrophysics
Galaxies: nuclei
Luminous infrared galaxy
Physics
Star formation
Astronomy
Astronomy and Astrophysics
Galaxies: active
Infrared: galaxies
Galaxies: groups: individual: Arp 245
Astrophysics - Astrophysics of Galaxies
Galaxy
groups: individual: Arp 245 [Galaxies]
13. Climate action
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
nuclei [Galaxies]
symbols
Astrophysics::Earth and Planetary Astrophysics
individual: NGC 2993 [Galaxies]
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 1365-2966
0035-8711
Popis: We present subarcsecond resolution infrared (IR) imaging and mid-IR (MIR) spectroscopic observations of the Seyfert 1.9 galaxy NGC 2992, obtained with the Gemini North Telescope and the Gran Telescopio CANARIAS (GTC). The N-band image reveals faint extended emission out to ∼3 kpc, and the polycyclic aromatic hydrocarbon features detected in the GTC/CanariCam 7.5–13 μm spectrum indicate that the bulk of this extended emission is dust heated by star formation. We also report arcsecond resolution MIR and far-IR imaging of the interacting system Arp 245, taken with the Spitzer Space Telescope and the Herschel Space Observatory. Using these data, we obtain nuclear fluxes using different methods and find that we can only recover the nuclear fluxes obtained from the subarcsecond data at 20–25 μm, where the active galactic nuclei (AGN) emission dominates. We fitted the nuclear IR spectral energy distribution of NGC 2992, including the GTC/CanariCam nuclear spectrum (∼50 pc), with clumpy torus models. We then used the best-fitting torus model to decompose the Spitzer/IRS 5–30 μm spectrum (∼630 pc) in AGN and starburst components, using different starburst templates. We find that, whereas at shorter MIR wavelengths the starburst component dominates (64 per cent at 6 μm), the AGN component reaches 90 per cent at 20 μm. We finally obtained dust masses, temperatures and star formation rates for the different components of the Arp 245 system and find similar values for NGC 2992 and NGC 2993. These measurements are within those reported for other interacting systems in the first stages of the interaction.
IGB acknowledges financial support from the Instituto de Astrofísica de Canarias through Fundacion La Caixa. This research was partly supported by a Marie Curie Intra European Fellowship within the 7th European Community Framework Programme (PIEF-GA-2012-327934). CRA and IGB acknowledge financial support from the Spanish Ministry of Science and Innovation (MICINN) through project PN AYA2013-47742-C4-2-P. AAH acknowledges funding from the Spanish Ministry of Economy and Competitiveness under grant AYA2012-31447, which is party funded by the FEDER program. PE acknowledges support from the Spanish Plan Nacional de Astronomía y Astrofísica under grant AYA2012-31277. OGM acknowledges support from grant AYA2012-39168-C03-01. TDS was supported by ALMA-CONICYT grant number 31130005.
Databáze: OpenAIRE
Externí odkaz: