workshop josÉ luis sÉrsic instituto de astronomía teórica y experimental, unc, conicet,...
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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
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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
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Bosque Alegre Observatory , Cordoba, Argentina
Observations: Newtonian focus of 60”inch
telescope at Bosque Alegre .
Instruments:Newtonian camera & nebular
spectrograph
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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 .
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Hα+[NII]
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Radial velocity & emission lines
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Photometric properties of the nuclei
500pc < Ring radius < 2 Kpc
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The emisson regions are HII r
egions
complex
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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
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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).
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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
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The Seyfert 2 galaxy NGC 1068
(Antonucci & Miller 1985)
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IAUS262 – RJ, Brazil, 2009. 21Image from: AGN news
Unified Model of AGN
Assuming the unified model for AGNs (Antonucci & Miller, 1985)
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ApJ 2011, 734:33
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The accretion disk of NGC1097
ESO optical image
Storchi-Bergmann, T., Baldwin, J. A., & Wilson, A. S. 1993, ApJ, 410, L11
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Storchi-Bergmann, et al 1995, ApJ, 443, 617
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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
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Animaton Black Hole eating a star
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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)
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NGC1808 Xray and mid-IR emission in the central region of NGC1808
MidIR
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Sales et al 2013 MNRAS 429
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Model of the Mid-IR spectrum of dust disk
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R< 26 pcs
PAHFIT decomposition of NGC1808 Mid-IR spectrum
*Silicate , PAH bands and dust
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IAUS262 – RJ, Brazil, 2009. 32Image from: AGN news
Unified Model of AGN
Assuming the unified model for AGNs (Antonucci & Miller, 1985)
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Nenkova’s Dusty Torus models with clouds
Nenkova et al , paper I e II Ap J 2008,2008
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The dusty torus with clouds of NGC 1808
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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)
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Bosque Alegre, Cordoba , Argentina 1972
Entre los presentes: Anita Gomez, Horacio Dottori , Elena Terlevich, Arnal, Miriani Pastoriza, Gustavo Carranza, Roberto Terlevich
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Swedish calculator FACIT
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Text editor : Mari Pizarro & OLIVETTI M 40
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Imaging processing : J. Albarracin
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END!