Testing the ULIRG/QSO transition hypothesis

Details Testing the ULIRG/QSO transition hypothesis Testing the ULIRG/QSO transition hypothesis

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.2853a&link_type=abstract

ATNF proposal C2247, Semester: April, 2010

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Active Galactic Nuclei / Quasars, Atca

Scientific paper

In the current scenario linking extreme starburst galaxies and optically powerful QSOs, both can be triggered by a merger of two gas-rich galaxies, which yields cool ultra-luminous IR galaxies (ULIRGs) and eventually IR-warm/optically bright QSOs. However, a recent ATCA high-fidelity imaging of a prototypical ULIRG to QSO transition object (HE 0450-298; z=0.29) showed a "wet-dry" interaction between a gas-rich ULIRG and a gas-poor elliptical, suggesting that other possible mechanisms trigger some of the most energetic events in the Universe. Finally such events, where the bulk of the stars forms away from the QSO during a merger process, may represent the very built-up of the well-known black-hole to stellar mass relation M_BH/M_star caught in the act (Elbaz et al. 2009). Here, we propose the first ever systematic study of such interactions by imaging the molecular gas distribution in four HST-imaged large ellipticals hosting the most optically luminous QSOs (Mv<-24) at z~0.3-0.4.

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