the bh mass of nearby qsos

The BH mass of nearby QSOs

A comparison of the bulge luminosity and virial methods

M. Labita, A. TrevesUniversità dell’Insubria, Como, ItalyR. Falomo INAF, Osservatorio Astronomico di Padova, ItalyM. Uslenghi INAF-IASF, Milano, Italy

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The virial method

Elliptical galaxies

SMBHs

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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The virial method (AGN)

RBLR: reverberation mapping

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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The virial method (3)

BRL radius

Nuclear luminosity

Pian E., Falomo R., Treves A. 2005, MNRAS, 361, 919

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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MBH and global propertiesof the host galaxy

Locally: Velocity dispersion ; Galaxy Luminosity:

Coevolution of host galaxies and SMBHs

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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MBH for close-by quasars

Virial method Host galaxy luminosity method

Sample: HST WFPC2 images

HST FOS spectra

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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The sample

30 QSOs 18 RLQs 12 RQQs

0.1< z <0.6

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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The spectra

Continuum subtracted

rest-frame spectra

C IV emission lines:

FWHM determination

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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BH mass comparison

f=1.3f=√3/2

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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Main results

MBH – Lbulge correlation obtained locally

can be extrapolated to z ~ 0.4

f ~ 1.3 i.e. disc-like BLR geometry

with inclination angles 12° < i < 48°

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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FWHM distribution

_____observed FWHM

cumulative distribution

- - - - -expected cumulative

distribution in a disc-like

BLR geometry

picture

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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QSOs inclination angles

Kolmogorov –

Smirnov test of

compatibility:

12° < i < 48°

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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QSOs at high z

From

Falomo et al.

2004

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

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ESO 3.6m + EFOSC2

THE BH MASS OF NEARBY QSOs – M. Labita, A. Treves, R. Falomo, M. Uslenghi

QSOs at high z:spectra