Extreme starburst: Near and Far, August 15-19, 2005 The blueshift of the [O III] emission line in NLS1s W. Bian [1], Q. Yuan [1] & Y. Zhao [2] [1] Department of Physics, Nanjing Normal University, Nanjing , China [2] National Astronomical Observatories, Chinese Academy of Sciences, Beijing , China

Extreme starburst: Near and Far, August 15-19, 2005 Outline 1. Introduction: NLS1s, M- σrelation, the blueshift of [O III], the “ blue outlier ” 2. SDSS sample and analysis 3. Results 4. Summary

Extreme starburst: Near and Far, August 15-19, What are NLS1s ? Observation: Narrow Hβ line width. FWHM(Hβ) < 2000 km s -1 Narrow Hβ line width. FWHM(Hβ) < 2000 km s -1 Strong optical Fe II multiples Strong optical Fe II multiples Weak [O III] ([OIII]/Hβ < 3) Weak [O III] ([OIII]/Hβ < 3) Soft X-ray excess Soft X-ray excess Rapid soft/hard X-ray variability Rapid soft/hard X-ray variability Theory: Less massive black hole Higher Eddington ratio Early stage of AGN evolution 1. Introduction

Extreme starburst: Near and Far, August 15-19, NLS1s from SDSS EDR (Williams R.J., Pogge R.W., Mathur S, 2003, AJ, 124, 3042) 22 NLS1s from HST observation (Constantin & Shields, 2003, PASP, 115, 592)

Extreme starburst: Near and Far, August 15-19, M – σrelation in NLS1s (Bian & Zhao, MNRAS, 2004, 347, 607; Grupe & Mathur, 2004, ApJ, 606, L41; Botte, 2005, MNRAS, 356, 789) Dynamics of NLRs in NLS1s would be different than that of other AGN

Extreme starburst: Near and Far, August 15-19, low-redshift AGN (Zamanzov R., et al., 2002, ApJ, 576, L9) Two largest blueshift of [O III] (Aoki K., et al., 2005, ApJ, 618, 601) 1.3 The shift of the peak of [O III] relative to Hβ

Extreme starburst: Near and Far, August 15-19, 2005 The [O III] blueshift versus the FWHM( Hβ ), and Fe IIλ4570/ Hβ In the population A region of the Eigenvector 1 parameter domain => strong Fe II lines and narrow Hβ line

Extreme starburst: Near and Far, August 15-19, 2005 Ref: Boroson T. A., Oke J. B., 1987, PASP, 99, 809 Grupe D., Thomas H.-C., Leighly K. M., 2001, A&A, 369, 450 Veron-Cetty M.-P., Veron, P., Goncalves A. C., 2001, A&A, 372, 730 Grupe D., Leighly K. M. 2002, in X-Ray Spectroscopy of AGN with Chandra and XMM-Newton, ed. T. Boller (MPE Rep. 279; Garching: MPE), 287 Zamanzov R., et al., 2002, ApJ, 576, L9 Marziani P., et al., 2003, MNRAS, 345, 1133 Aoki K., Kawaguchi T., OhtacK., 2005, ApJ, 618, 601

Extreme starburst: Near and Far, August 15-19, SDSS sample and analysis 150 NLS1 in SDSS EDR 150 NLS1 in SDSS EDR IRAF-SPECFIT: correct the blue wind of [O III] IRAF-SPECFIT: correct the blue wind of [O III] (1) a power-law continuum (1) a power-law continuum (2) Fe II multiples (2) Fe II multiples (3) Three two-component sets for H β and (3) Three two-component sets for H β and [O III] 4959, [O III] 4959, 5007.

Extreme starburst: Near and Far, August 15-19, Results 3.1 Distributions of the blueshift

Extreme starburst: Near and Far, August 15-19, The “ blue outliers ” For SDSS J : Criterion:

Extreme starburst: Near and Far, August 15-19, 2005 For SDSS J :

Extreme starburst: Near and Far, August 15-19, Correlations between the blueshift and some parameters

Extreme starburst: Near and Far, August 15-19, Summary Two-component models to fit the emission lines of [O III] 4959, 5007 and Hβin SDSS NLS1s. Two-component models to fit the emission lines of [O III] 4959, 5007 and Hβin SDSS NLS1s. Mean blueshift is -52km s -1. Mean blueshift is -52km s -1. Seven ``blue outliers “ are found. The largest blueshift of SDSS is -931km s -1. Seven ``blue outliers “ are found. The largest blueshift of SDSS J is -931km s -1. Strong correlations between the [O III] blueshift and the Eddington ratio, and Fe IIλ4570/ Hβ. Clues to the origin of the ``blue outliers “. Strong correlations between the [O III] blueshift and the Eddington ratio, and Fe IIλ4570/ Hβ. Clues to the origin of the ``blue outliers “. [O III] =>σ [O III] =>σ

Extreme starburst: Near and Far, August 15-19, 2005 Thank you ! Thank you !