Activity of the Group for Astrophysical Spectroscopy -
GAS Luka Č. Popović
Astronomical Observatory, Belgrade, Serbia
Four projects financed by Ministry of education and science
Pr176001 – Astrophyscal spectroscopy of extragalactic Objects
• Edi Bon (PhD 2010)• Miodrag Dacic (until 2011, in pension)• Milan Dimitrijevic (until 2011, now involved in interdisciplinar project,
leaded by D. Jevremovic)• Natasa Gavrilovic-Bon (PhD in 2011) • Dragana Ilic• Predrag Jovanovic• Andjelka Kovacevic• Jelena Kovacevic (PhD in 2011)• Luka Popovic• Sasa Simic• Marko Stalevski (PhD student)
Pr176001 – Astrophyscal spectroscopy of extragalactic Objects – Participants from another institutions
• Evangelia Lyratzy (Greece)
• Evencio Mediavilla (Spain)
• Alla I. Shapovalova (Russia)
• Three EM students working on subjects from the project
• Payaswini, Nemanja and Luca
Some conferences – 8 SCSLSA
Last two years (2010 to 2012) we published 41 papers, 14 in the journals from ISI list
• 8 SCSLSA in June 2011, Proceedings in Baltic Astronomy, Vol. 20 (Eds. L. C. Popovic, D. Ilic and D. Jevremovic)
• Workshop on Supermassive Black Hole Binaries – Proc. New Astronomy Reviews, Volume 56, Issue 2 (Ed L. C. Popovic)
• SPIG 2010 Proc. in Journal of Physics: Conference Series, Volume 257, Issue 1 (Eds. L. C. Popovic and M. Kuraica)
• Three PhD thesis, Edi, Natasha and Jelena
• Participation in two COST actions: MP0905 Black Holes in a Violent Unvierse (MC L. Popovic and P. Jovanovic) and MP 1104 Polarization in Astronomy (MC D. Ilic and L. Popovic)
• Participation in EM master studies in Astrophysics – Astromundus (D. Ilic, L. Popovic)
Subjects
• Active Galactic Nuclei
• Gravitational Lensis
• Gamma Ray Bursts
АGN
AGN Part• Central Part (monitoring program with A.I. Shapovalova –
Russia, V. Chavushian – Mexico and W. Kollatschny – Germany) and SDSS spectra. Work of Payaswini and Nemanja
• Physics of the BLR (P. Rafanelli and G. La Mura – Italy)
• Broad Absorption Lines in AGN (E. Danezis and V. Lyratzi – Greece)
• Polarization in the BLR (here to talk with V. Afanasiev - Russia)
• AGN Torus (part of M. Stalevski PhD, M. Baes – Belgium)
• Stellar populations in AGNs (Natasha Gavrilovic-Bon, collaboration with Lyon Observatory – France)
Disk emission in the optical broad lines – geometry of the BLR – e.g. 3C390.3
• Eracleous & Halpern 1994, 2003, ApJ
• Shapovalova, Popovic, Burenkov et al. 2010, A&A
• Popovic, Shapovalova, Ilic et al. 2011, A&A
• Double peaked lines
• Very broad
• Radio loud AGN
• Variability in line intensities and line shapes (Shapovalova, Popovic et al. 2010, Popovic et al. 2011)
• Very small fraction, 3-5%, of BLAGN
Gravitational lensing
• Obs. 6m telescope
SAO (A. Moeseev)
Theoretical part
E. Mediavilla – Spain
Stalevski et al. 2012,
Sent to MNRAS
Lensing of the torus
Gamma ray bursts• Modified Shock
wave model
(Simic & Popovic
2012, IJMPD)
Luca is working on
multi-peaked GRB
light curves
Hierarchical galaxy formation in Hierarchical galaxy formation in CDM cosmology (Credit: MPA)CDM cosmology (Credit: MPA)
Mergers of galaxies & AGNs(see Popovic 2012, NewAR, review paper)
binary AGNs ~ 1.4 kpc
(Komossa et al., 2003)
IMBHs in global clusters?
NGC4472 (Maccorane et al, 2007, Nat)
SMBHBs at Sgr A*? (Hansen & Milosavljevic 2003)
Begelman, Blandford, Rees, 1980, Nat
Some interesting profiles
We are here to discuss
• E.g. Spectral line polarization and binary black holes
• UV & Optical spectra AGN
• Variabilty of AGNs, monitoring projects
• GRBs and high energy emission of AGNs
• The structure and physics of the BLR
• Etc.
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