The eROSITA Final Equatorial-Depth Survey (eFEDS)
| Autor: | R. Arcodia, Yoshiki Toba, Yuichi Higuchi, Tohru Nagao, Kirpal Nandra, Kaiki Taro Inoue, Toshihiro Kawaguchi, Yuichi Terashima, Marcella Brusa, Andy D. Goulding, Mara Salvato, Tanya Urrutia, Georg Lamer, Yoshihiro Ueda, Teng Liu, Masayuki Akiyama, Andrea Merloni, Johannes Buchner |
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| Přispěvatelé: | Toba Yoshiki, Brusa Marcella, Liu Teng, Buchner Johannes, Terashima Yuichi, Urrutia Tanya, Salvato Mara, Akiyama Masayuki, Arcodia Riccardo, Goulding,y D., Higuchi Yuichi, Inoue Kaiki T., Kawaguchi Toshihiro, Lamer Georg, Merloni,rea, Nagao Tohru, Ueda Yoshihiro, Nandra Kirpal |
| Rok vydání: | 2021 |
| Předmět: |
Active galactic nucleus
Infrared media_common.quotation_subject Population FOS: Physical sciences Astrophysics 01 natural sciences Luminosity 0103 physical sciences education galaxies: active X-rays: galaxies infrared: galaxies quasars: individual: WISE J090924.01+000211.1 Astrophysics - Astrophysics of Galaxies Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics media_common High Energy Astrophysical Phenomena (astro-ph.HE) Physics Luminous infrared galaxy education.field_of_study 010308 nuclear & particles physics Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Space and Planetary Science Sky Astrophysics of Galaxies (astro-ph.GA) Spectral energy distribution Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Astronomy & Astrophysics. 649:L11 |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | In this study, we investigate the X-ray properties of WISE J090924.01+000211.1 (WISEJ0909+0002), an extremely luminous infrared (IR) galaxy (ELIRG) at $z_{\rm spec}$= 1.871 in the eROSITA final equatorial depth survey (eFEDS). WISEJ0909+0002 is a WISE 22 $��$m source, located in the GAMA-09 field, detected by eROSITA during the performance and verification phase. The corresponding optical spectrum indicates that this object is a type-1 active galactic nucleus (AGN). Observations from eROSITA combined with Chandra and XMM-Newton archival data indicate a very luminous ($L$ (2--10 keV) = ($2.1 \pm 0.2) \times 10^{45}$ erg s$^{-1}$) unobscured AGN with a power-law photon index of $��$ = 1.73$_{-0.15}^{+0.16}$, and an absorption hydrogen column density of $\log\,(N_{\rm H}/{\rm cm}^{-2}) < 21.0$. The IR luminosity was estimated to be $L_{\rm IR}$ = (1.79 $\pm$ 0.09) $\times 10^{14}\, L_{\odot}$ from spectral energy distribution modeling based on 22 photometric data (X-ray to far-IR) with X-CIGALE, which confirmed that WISEJ0909+0002 is an ELIRG. A remarkably high $L_{\rm IR}$ despite very low $N_{\rm H}$ would indicate that we are witnessing a short-lived phase in which hydrogen gas along the line of sight is blown outwards, whereas warm and hot dust heated by AGNs still exist. As a consequence of eROSITA all-sky survey, $6.8_{-5.6}^{+16}\times 10^2$ such X-ray bright ELIRGs are expected to be discovered in the entire extragalactic sky ($|b| > 10^\circ$). This can potentially be the key population to constrain the bright-end of IR luminosity functions. 10 pages, 5 figures, and 3 tables, accepted for publication in A&A Letters (special Issue: First science highlights from SRG/eROSITA) |
| Databáze: | OpenAIRE |
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