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The most obscured AGN in the COSMOS field
Astronomy and Astrophysics, 578 (2015); A120. https://doi.org/10.1051/0004-6361/201526036
Lanzuisi, G.; Pernar, Margareta; Delvecchio, I.; Berta, S.; Brusa, M.; Cappelluti, N.; Comastri, A.; Gilli, R.; Gruppioni, C.; Mignoli, M.; Pozzi, F.; Vietri, G.; Vignali, C.; Zamorani, G.

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Lanzuisi, G., Pernar, M., Delvecchio, I., Berta, S., Brusa, M., Cappelluti, N. ... Zamorani, G. (2015). The most obscured AGN in the COSMOS field. Astronomy and Astrophysics, 578.. doi: 10.1051/0004-6361/201526036

Lanzuisi, G., et al. "The most obscured AGN in the COSMOS field." Astronomy and Astrophysics, vol. 578, 2015. https://doi.org/10.1051/0004-6361/201526036

Lanzuisi, G., Margareta Pernar, I. Delvecchio, S. Berta, M. Brusa, N. Cappelluti, A. Comastri, et al. "The most obscured AGN in the COSMOS field." Astronomy and Astrophysics 578 (2015). https://doi.org/10.1051/0004-6361/201526036

Lanzuisi, G., et al. (2015) 'The most obscured AGN in the COSMOS field', Astronomy and Astrophysics, 578. doi: 10.1051/0004-6361/201526036

Lanzuisi G, Pernar M, Delvecchio I, Berta S, Brusa M, Cappelluti N, i sur.. The most obscured AGN in the COSMOS field. Astronomy and Astrophysics [Internet]. 2015. [pristupljeno 22.01.2025.];578. doi: 10.1051/0004-6361/201526036

G. Lanzuisi, et al., "The most obscured AGN in the COSMOS field", Astronomy and Astrophysics, vol. 578, 2015. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:442812. [Citirano: 22.01.2025.]

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Naslov (engleski)The most obscured AGN in the COSMOS field
AutorG. Lanzuisi
AutorMargareta Pernar
AutorI. Delvecchio
AutorS. Berta
AutorM. Brusa
AutorN. Cappelluti
AutorA. Comastri
AutorR. Gilli
AutorC. Gruppioni
AutorM. Mignoli
AutorF. Pozzi
AutorG. Vietri
AutorC. Vignali
AutorG. Zamorani
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Astronomija i astrofizika
Sažetak (engleski)
Highly obscured active galactic nuclei (AGN) are common in nearby galaxies, but are difficult to observe beyond the local Universe, where they are expected to significantly contribute to the black hole accretion rate density. Furthermore, Compton-thick (CT) absorbers (NH >∼ 1024 cm−2) suppress even the hard X-ray (2−10 keV) AGN nuclear emission, and therefore the column density distribution above 1024 cm−2 is largely unknown. We present the identification and multi-wavelength properties of a heavily obscured (NH >∼ 1025 cm−2), intrinsically luminous (L2−10 > 1044 erg s−1) AGN at z = 0.353 in the COSMOS field. Several independent indicators, such as the shape of the X-ray spectrum, the decomposition of the spectral energy distribution and X-ray/[NeV] and X-ray/6 μm luminosity ratios, agree on the fact that the nuclear emission must be suppressed by a >∼1025 cm−2 column density. The host galaxy properties show that this highly obscured AGN is hosted in a massive star-forming galaxy, showing a barred morphology, which is known to correlate with the presence of CT absorbers. Finally, asymmetric and blueshifted components in several optical high-ionization emission lines indicate the presence of a galactic outflow, possibly driven by the intense AGN activity (LBol/LEdd = 0.3−0.5). Such highly obscured, highly accreting AGN are intrinsically very rare at low redshift, whereas they are expected to be much more common at the peak of the star formation and BH accretion history, at z ∼ 2−3. We demonstrate that a fully multi-wavelength approach can recover a sizable sample of such peculiar sources in large and deep surveys such as COSMOS.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaAstronomy and Astrophysics
Brojčani podacivol. 578, A120
p-ISSN0004-6361
DOIhttps://doi.org/10.1051/0004-6361/201526036
URN:NBNurn:nbn:hr:217:442812
Datum objave publikacije2015
URL dokumentahttps://www.aanda.org/articles/aa/abs/2015/06/aa26036-15/aa26036-15.html
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Javna napomena© 2015 ESO. Received 6 March 2015. Accepted 15 April 2015. Published online 15 June 2015.
Datum i vrijeme pohrane2020-01-11 19:41:46