The first detection of near-infrared CN bands in active galactic nuclei: signature of star formation
arXiv:astro-ph/0703272 · doi:10.1086/517999
Abstract
We present the first detection of the near-infrared CN absorption band in the nuclear spectra of active galactic nuclei (AGN). This feature is a recent star formation tracer, being particularly strong in carbon stars. The equivalent width of the CN line correlates with that of the CO at 2.3 microns, as expected in stellar populations (SP) with ages between ~ 0.2 and ~ 2 Gyr. The presence of the 1.1 microns CN band in the spectra of the sources is taken as an unambiguous evidence of the presence of young/intermediate SP close to the central source of the AGN. Near-infrared bands can be powerful age indicators for star formation connected to AGN, the understanding of which is crucial in the context of galaxy formation and AGN feedback.
Accepted for publication in The Astrophysical Journal Letters. 4 pages, 3 figures
References in corpus (2)
Cited by in corpus (25)
- Probing the near infrared stellar population of Seyfert galaxies
- The Nuclear Near-Infrared Spectral Properties of Nearby Galaxies
- A new stellar library in the region of the CO index at 2.3 m. New index definition and empirical fitting functions
- Modelling simple stellar populations in the near-ultraviolet to near-infrared with the X-shooter Spectral Library (XSL)
- Full Spectroscopic Model and Trihybrid Experimental-Perturbative-Variational Line List for CN
- The Stellar Populations of Starburst Galaxies Through near infrared spectroscopy
- Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations
- The Stellar Spectral Features of Nearby Galaxies in the Near-Infrared: Tracers of Thermally-Pulsing Asymptotic Giant Branch Stars?
- Optical/NIR stellar absorption and emission-line indices from luminous infrared galaxies
- Near-Infrared Coronal Line Observations of Dwarf Galaxies hosting AGN-driven Outflows
- Experimental energy levels of 12C14N through MARVEL analysis
- Mapping the stellar population and gas excitation of MaNGA galaxies with MEGACUBES. Results for AGN versus control sample
- Probing the Circumnuclear Stellar Populations of Starburst Galaxies in the Near-infrared
- Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: VI -- Stellar Populations
- Relics of Supermassive Black Hole Seeds: The Discovery of an Accreting Black Hole in an Optically Normal, Low Metallicity Dwarf Galaxy
- Obscuring fraction of active galactic nuclei implied by supernova and radiative feedbacks
- Differences between CO- and calcium triplet-derived velocity dispersions in spiral galaxies: evidence for central star formation?
- Unveiling the Narrow-Line Seyfert 1 Nature of Mrk 573 using near-Infrared spectroscopy
- Star formation in AGNs at the hundred parsec scale using MIR high resolution images
- Fingerprints of Stellar Populations in the Near-Infrared: An Optimised Set of Spectral Indices in the JHK-Bands
- Outflows, Inflows and Young Stars in the inner 200 pc of the Seyfert galaxy NGC 2110
- Strong spectral features from asymptotic giant branch stars in distant quiescent galaxies
- TP-AGB stars and stellar population properties of a post-starburst galaxy at through optical and NIR spectroscopy with JWST
- Extragalactic globular cluster near-infrared spectroscopy: I. Integrated near-infrared spectra of Centaurus A/NGC 5128
- SMARTY: The mileS Moderate resolution neAr-infRared sTellar librarY