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Sökning: onr:"swepub:oai:research.chalmers.se:ffca4e75-2c2d-4288-b358-6143709ed50a" > Extreme Nature of F...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004690naa a2200529 4500
001oai:research.chalmers.se:ffca4e75-2c2d-4288-b358-6143709ed50a
003SwePub
008230112s2022 | |||||||||||000 ||eng|
0247 a https://research.chalmers.se/publication/5341202 URI
0247 a https://doi.org/10.3847/1538-4357/aca4032 DOI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Noboriguchi, Akatokiu Ehime University,Tohoku University4 aut
2451 0a Extreme Nature of Four Blue-excess Dust-obscured Galaxies Revealed by Optical Spectroscopy
264 c 2022-12-23
264 1b American Astronomical Society,c 2022
338 a electronic2 rdacarrier
520 a We report optical spectroscopic observations of four blue-excess dust-obscured galaxies (BluDOGs) identified by the Subaru Hyper Suprime-Cam. BluDOGs are a subclass of dust-obscured galaxies (DOGs; defined with the extremely red color (i − [22])AB ≥ 7.0; Toba et al., showing a significant flux excess in the optical g and r bands over the power-law fits to the fluxes at the longer wavelengths. Noboriguchi et al. have suggested that BluDOGs may correspond to the blowing-out phase involved in a gas-rich major-merger scenario. However, the detailed properties of BluDOGs are not understood because of the lack of spectroscopic information. In this work, we carry out deep optical spectroscopic observations of four BluDOGs using Subaru/FOCAS and VLT/FORS2. The obtained spectra show broad emission lines with extremely large equivalent widths, and a blue wing in the C iv line profile. The redshifts are between 2.2 and 3.3. The averaged rest-frame equivalent widths of the C iv lines are 160 ± 33 Å, ∼7 times higher than the average of a typical type 1 quasar. The FWHMs of their velocity profiles are between 1990 and 4470 km s−1, and their asymmetric parameters are 0.05 and 0.25. Such strong C iv lines significantly affect the broadband magnitudes, which are partly the origin of the blue excess seen in the spectral energy distribution of BluDOGs. Their estimated supermassive black hole masses are 1.1 × 108 < M BH/M ⊙ <5.5 × 108. The inferred Eddington ratios of the BluDOGs are higher than 1 (1.1 < λ Edd < 3.8), suggesting that the BluDOGs are in a rapidly evolving phase of supermassive black holes.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
650 7a NATURVETENSKAPx Fysikx Den kondenserade materiens fysik0 (SwePub)103042 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Condensed Matter Physics0 (SwePub)103042 hsv//eng
7001 a Nagao, Tohruu Ehime University4 aut
7001 a Toba, Y.u Academia Sinica Taiwan,Kyoto University,Ehime University,National Astronomical Observatory of Japan4 aut
7001 a Ichikawa, Koheiu Tohoku University4 aut
7001 a Kajisawa, Masaruu Ehime University4 aut
7001 a Kato, Nanakou Ehime University4 aut
7001 a Kawaguchi, Toshihiro4 aut
7001 a Matsuhara, Hideou The Graduate University for Advanced Studies (SOKENDAI)4 aut
7001 a Matsuoka, Yoshikiu Ehime University4 aut
7001 a Onishi, Kyoko,d 1989u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)kyokoo
7001 a Onoue, Masafusau University of Tokyo, Japan,Beijing University of Technology,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Tamada, Nozomuu Ehime University4 aut
7001 a Terao, Kokiu National Astronomical Observatory of Japan,Tohoku University4 aut
7001 a Terashima, Yuichiu Ehime University4 aut
7001 a Ueda, Yoshihirou Kyoto University4 aut
7001 a Yamashita, Takujiu National Astronomical Observatory of Japan,Ehime University4 aut
7102 a Ehime Universityb Tohoku University4 org
7730 t Astrophysical Journald : American Astronomical Societyg 941:2q 941:2x 1538-4357x 0004-637X
8564 u https://research.chalmers.se/publication/534120/file/534120_Fulltext.pdfx primaryx freey FULLTEXT
8564 8u https://research.chalmers.se/publication/534120
8564 8u https://doi.org/10.3847/1538-4357/aca403

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