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Near Infrared Spectroscopy And The Search For CO Emission In 3 Extremely Luminous IRAS Sources

Evans, Aaron S. and Sanders, D. B. and Cutri, Roc M. and Radford, Simon J. E. and Solomon, Phil M. and Downes, Dennis and Kramer, Carsten (1999) Near Infrared Spectroscopy And The Search For CO Emission In 3 Extremely Luminous IRAS Sources. In: Galaxy Interactions at Low and High Redshift. International Astronomical Union Symposium (IAUS). No.186. Springer , Dordrecht, p. 354. ISBN 978-0-7923-5833-6.

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Rest-frame 0.48-1.1 μm emission line strengths and molecular gas mass (H_2) upper limits for three luminous infrared sources — the hyperluminous infrared galaxies (HyLIGs: L_(ir) ≥ 10^(13) L_⨀ where L_(ir) ∼ L(8 – 1000μm) IRAS F09105+4108 (z = 0.4417), IRAS F15307+3252 (z = 0.926), and the optically-selected QSO PG 1634+706 (z = 1.338) — are presented. Diagnostic emission-line ratios ([O III] λ5007/Hß, [S II] λ6724/Hα, [N II] λ6583/Hα, and [S III] λλ9069+9532/Hα) indicate a Seyfert 2-like spectrum for both infrared galaxies, consistent with previously published work. Upper limits on the molecular gas mass for all three sources are M(H_2) < 1 – 3 x 10^(10) h^(-2) M_⨀ (q_0 = 0.5, H_0 = 100h km s^(-1) Mpc^(-1)), less than the H_2 mass of the most gas-rich infrared galaxies in the local Universe. All three sources have L_(ir)/L′_(CO) ∼ 1300 – 2000, the most extreme values for extra-galactic sources measured to date. Given the relatively warm far-infrared colors for all three objects, much of their infrared luminosity may emanate from a relatively small quantity of hot dust near an AGN.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Evans, Aaron S.0000-0003-2638-1334
Sanders, D. B.0000-0002-1233-9998
Cutri, Roc M.0000-0002-0077-2305
Additional Information:© 1999 Springer Science+Business Media Dordrecht.
Group:Infrared Processing and Analysis Center (IPAC)
Subject Keywords:Infrared Spectroscopy; Emission Line; Near Infrared Spectroscopy; High Redshift; Line Strength
Series Name:International Astronomical Union Symposium (IAUS)
Issue or Number:186
Record Number:CaltechAUTHORS:20190607-135206260
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96209
Deposited By: Tony Diaz
Deposited On:07 Jun 2019 21:40
Last Modified:16 Nov 2021 17:19

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