WORKSHOP JOSÉ LUIS SÉRSIC Instituto de Astronomía Teórica y Experimental, UNC, CONICET, Córdoba , 11 y 12 de Abril de 2013

,

Update of Physical Properties of

Galaxies with Peculiar Nuclei

Miriani Griselda PastorizaDepartamento de Astronomia IF/UFRGSPorto Alegre, Brasil

Summary Part I - Galaxies with peculiar nuclei . Morgan’s work at Yerkes Observatory , University of

Chicago - Galaxies with peculiar Nuclei . Sersic & Pastoriza’s works at Cordoba Observatory ,

UNC

Part II - High resolution observations of SP galaxies ( scale < 1 “) show a complex nucleus:

Starburst & Seyfert nucleus-The accretion disk of NGC1097-The dusty torus of NGC 1808

Bosque Alegre Observatory , Cordoba, Argentina

Observations: Newtonian focus of 60”inch

telescope at Bosque Alegre .

Instruments:Newtonian camera & nebular

spectrograph

From 174 galaxies brighter than

m=11.0 mag, a fraction of 14% of

the sample shows peculiar nuclei, all of

them are bar spirals .

Hα+[NII]

Radial velocity & emission lines

Photometric properties of the nuclei

500pc < Ring radius < 2 Kpc

The emisson regions are HII r

egions

complex

Rings are formed by gas accumulation at Lindblad resonances, under the continuous action of gravity torques

from the bar pattern.

Buta & Combes 1996 http://ned.ipac.caltech.edu/level5/Rings/frames.html

Formation of Inner ring

• Figure 75. Simulation of an inner ring from Schwarz (1979) and Simkin et al. (1980), showing the evolution from a spiral pseudoring (upper left) to a more closed ring pattern (lower right).

NGC5548

Stellar nucleus and broad HI y He emisson lines FWHM~ 8000km/sec Narrow emisson lines of ions [OIII], [SII], [NII] …, HI HeI FWHM~ 2000km/sec

Clasificacion Seyfert 1 ….. 1, 8 Kachikian & Weedman 1970

Karl Seyfert 1943ApJ....97...28S

The Seyfert 2 galaxy NGC 1068

(Antonucci & Miller 1985)

IAUS262 – RJ, Brazil, 2009. 21Image from: AGN news

Unified Model of AGN

Assuming the unified model for AGNs (Antonucci & Miller, 1985)

ApJ 2011, 734:33

The accretion disk of NGC1097

ESO optical image

Storchi-Bergmann, T., Baldwin, J. A., & Wilson, A. S. 1993, ApJ, 410, L11

Storchi-Bergmann, et al 1995, ApJ, 443, 617

Storchi-Bergmann et al ApJ

*A model of elliptical ring around a 106 solar mass nuclear black hole can reproduce the observed profile variations.

*The line-emitting ring is the result of the tidal disruption of a star by the black hole

The Model that reproduce the observed profile variation

Animaton Black Hole eating a star

The dusty torus of the seyfert 2 NGC 1808

K [FeII] HI (Br)

H2

Brγ traces young massive stars ( > 30 Doradus), while the [FeII] 1.64 µm line traces young supernova remnants Kotilainen, et al. A&A, 313, 771 (1996)

NGC1808 Xray and mid-IR emission in the central region of NGC1808

MidIR

Sales et al 2013 MNRAS 429

Model of the Mid-IR spectrum of dust disk

R< 26 pcs

PAHFIT decomposition of NGC1808 Mid-IR spectrum

*Silicate , PAH bands and dust

IAUS262 – RJ, Brazil, 2009. 32Image from: AGN news

Unified Model of AGN

Assuming the unified model for AGNs (Antonucci & Miller, 1985)

Nenkova’s Dusty Torus models with clouds

Nenkova et al , paper I e II Ap J 2008,2008

The dusty torus with clouds of NGC 1808

Grupo de Astronomia ExtragalaticaObservatorio de Cordoba, Argentina, 1969

Horacio Dottori, Estela Aguero, Dr Jose Luis Sersic, Dr Landi, Lic Gustavo Carranza, Lic Miriani G. Pastoriza , Mary

Dottori Horacio, Aguero Estela, Sersic Jose Luis, Landi , Mc L , Carranza Gustavo,Pastoriza Miriani, Pizarro Mari. (1966)

Bosque Alegre, Cordoba , Argentina 1972

Entre los presentes: Anita Gomez, Horacio Dottori , Elena Terlevich, Arnal, Miriani Pastoriza, Gustavo Carranza, Roberto Terlevich

Swedish calculator FACIT

Text editor : Mari Pizarro & OLIVETTI M 40

Imaging processing : J. Albarracin

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