Redshift Evolution in Black Hole-Bulge Relations: Testing C IV-Based Black Hole Masses

We re-examine claims for redshift evolution in black hole-bulge scaling relations based on lensed quasars. In particular, we refine the black hole (BH) mass estimates using measurements of Balmer lines from near-infrared spectroscopy obtained with Triplespec at Apache Point Observatory. In support o...

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Bibliographic Details
Published in:The Astrophysical journal 2010-02, Vol.709 (2), p.937-937
Main Authors: Greene, Jenny E, Peng, Chien Y, Ludwig, Randi R
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
ACCELERATORS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BALMER LINES
BLACK HOLES
Black holes (astronomy)
CALIBRATION
COSMIC RADIO SOURCES
CYCLIC ACCELERATORS
CYCLOTRONS
EVOLUTION
GALACTIC EVOLUTION
GALAXIES
GALAXY NUCLEI
INFRARED SPECTRA
ISOCHRONOUS CYCLOTRONS
LINE WIDTHS
MASS
QUASARS
RED SHIFT
SPECTRA
SPECTROSCOPY
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Summary:We re-examine claims for redshift evolution in black hole-bulge scaling relations based on lensed quasars. In particular, we refine the black hole (BH) mass estimates using measurements of Balmer lines from near-infrared spectroscopy obtained with Triplespec at Apache Point Observatory. In support of previous work, we find a large scatter between Balmer and UV line widths, both Mg IIlambdalambda2796, 2803 and C IVlambdalambda1548, 1550. There is tentative evidence that C III]lambda1909, despite being a blend of multiple transitions, may correlate well with Mg II, although a larger sample is needed for a real calibration. Most importantly, we find no systematic changes in the estimated BH masses for the lensed sample based on Balmer lines, providing additional support to the interpretation that black holes were overly massive compared to their host galaxies at high redshift.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/709/2/937