TY - JOUR
T1 - Supermassive black holes with high accretion rates in active galactic nuclei. I. First results from a new reverberation mapping campaign
AU - Du, Pu
AU - Hu, Chen
AU - Lu, Kai Xing
AU - Wang, Fang
AU - Qiu, Jie
AU - Li, Yan Rong
AU - Bai, Jin Ming
AU - Kaspi, Shai
AU - Netzer, Hagai
AU - Wang, Jian Min
PY - 2014/2/10
Y1 - 2014/2/10
N2 - We report first results from a large project to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). Such objects may be different from other AGNs in being powered by slim accretion disks and showing saturated accretion luminosities, but both are not yet fully understood. The results are part of a large reverberation mapping (RM) campaign using the 2.4 m Shangri-La telescope at the Yunnan Observatory in China. The goals are to investigate the gas distribution near the BH and the properties of the central accretion disks, to measure BHmass and Eddington ratios, and to test the feasibility of using such objects as a newtype of cosmological candles. The paper presents results for three objects, Mrk 335, Mrk 142, and IRAS F12397+3333, with Hß time lags relative to the 5100Å continuum of 10.6+1.7 -2.9, 6.4+0.8 -2.2 and 11.4+2.9 -1.9 days, respectively. The corresponding BH masses are (8.3+2.6 -3.2)×106M⊙, (3.4+0.5 -1.2)×106M⊙, and (7.5+4.3 -4.1)×106M⊙, and the lower limits on the Eddington ratios are 0.6, 2.3, and 4.6 for the minimal radiative efficiency of 0.038. Mrk 142 and IRAS F12397+333 (extinction corrected) clearly deviate from the currently known relation between Hß lag and continuum luminosity. The three Eddington ratios are beyond the values expected in thin accretion disks and two of them are the largest measured so far among objects with RM-based BH masses. We briefly discuss implications for slim disks, BH growth, and cosmology.
AB - We report first results from a large project to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). Such objects may be different from other AGNs in being powered by slim accretion disks and showing saturated accretion luminosities, but both are not yet fully understood. The results are part of a large reverberation mapping (RM) campaign using the 2.4 m Shangri-La telescope at the Yunnan Observatory in China. The goals are to investigate the gas distribution near the BH and the properties of the central accretion disks, to measure BHmass and Eddington ratios, and to test the feasibility of using such objects as a newtype of cosmological candles. The paper presents results for three objects, Mrk 335, Mrk 142, and IRAS F12397+3333, with Hß time lags relative to the 5100Å continuum of 10.6+1.7 -2.9, 6.4+0.8 -2.2 and 11.4+2.9 -1.9 days, respectively. The corresponding BH masses are (8.3+2.6 -3.2)×106M⊙, (3.4+0.5 -1.2)×106M⊙, and (7.5+4.3 -4.1)×106M⊙, and the lower limits on the Eddington ratios are 0.6, 2.3, and 4.6 for the minimal radiative efficiency of 0.038. Mrk 142 and IRAS F12397+333 (extinction corrected) clearly deviate from the currently known relation between Hß lag and continuum luminosity. The three Eddington ratios are beyond the values expected in thin accretion disks and two of them are the largest measured so far among objects with RM-based BH masses. We briefly discuss implications for slim disks, BH growth, and cosmology.
KW - accretion, accretion disks
KW - black hole physics
KW - galaxies: active
UR - http://www.scopus.com/inward/record.url?scp=84893145611&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/782/1/45
DO - 10.1088/0004-637X/782/1/45
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AN - SCOPUS:84893145611
SN - 0004-637X
VL - 782
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 45
ER -