Main Image

Narrow-Line Seyfert 1 Galaxies and their place in the Universe

April 4-6, 2011
Milano, Italy
In 1978, Davidson and Kinman wrote about Markarian 359: "This unusual object merits further observations...". In 1985, Osterbrock and Pogge defined a new class of active galactic nuclei (AGN), named Narrow-Line Seyfert 1 (NLS1). Twenty-five years later, NLS1s still continue to intrigue and bewilder. NLS1s manifest extreme behaviour at all wavelengths. They exhibit the most extreme X-ray variability seen in radio-quiet AGN, the most intense optical FeII emission, and high rates of star formation. In general, their characteristics are consistent of AGNs with relatively low mass black holes accreting close to the Eddington rate. The 2009 Fermi Gamma-ray Space Telescope discovery of high-energy (E>100 MeV) gamma rays in a handful of NLS1s has established the existence of relativistic jets in these systems -- a fact previously hinted at by the flat radio spectrum and high brightness temperature seen in some objects. Since NLS1 are generally hosted by spirals, this poses some intriguing questions on the galaxy evolution and on how relativistic jets are generated. It is therefore time for the broad community to come together and discuss what we have discovered in the last quarter century and lay the foundation for future work.

Workshop Topics: * Central engine: BH mass, accretion disk, BLR/NLR, jet * Host galaxy: morphology, star formation, merging history * NLS1 in the Universe: comparison with other types of AGN, surveys/statistics, formation/merging, cosmological evolution

Editorial Board: Luigi Foschini (chair), Monica Colpi, Luigi Gallo, Dirk Grupe, Stefanie Komossa, Karen Leighly, Smita Mathur.

conference main image
General Properties, Surveys
High Energy Emission, Jets and Outflows
Masses, Host Galaxies, Evolution
PoS(NLS1)001 file missing G. Pareschi
General Properties, Surveys
A quarter century of Narrow-Line Sefert 1s (invited)
PoS(NLS1)002 pdf R.W. Pogge
NLS1 properties and demographics (invited)
PoS(NLS1)003 pdf T.A. Boroson
Statistical analysis of an AGN sample with simultaneous UV and X-ray observations with Swift
PoS(NLS1)004 pdf D. Grupe
The continuum and emission line properties of NLS1s based on a new SDSS sample of low luminosity type-1 AGN
PoS(NLS1)005 file missing J. Stern
The narrow-line region of narrow-line Seyfert 1 galaxies
PoS(NLS1)006 pdf D. Xu and S. Komossa
Molecular hydrogen in NLSys and its implications for the SED
PoS(NLS1)013 pdf G. Ferland
The long-term variability of a large sample of AGN
PoS(NLS1)008 pdf R. Saxton
The near-IR broad-emission line region of AGN
PoS(NLS1)009 pdf H. Landt
Enhanced star formation in Narrow-Line Seyfert 1 galaxies
PoS(NLS1)010 pdf E. Sani
Hot dust, warm dust and star formation in NLS1s
PoS(NLS1)011 pdf R. Mor
Dynamics of clouds in the broad-line region
PoS(NLS1)014 pdf M. Krause, M. Schartmann and A. Burkert
Emission line profiles and X-ray observations of broad and narrow line Seyfert 1 galaxies
PoS(NLS1)056 pdf attachments G. La Mura, S. Ciroi, V. Cracco, D. Ilic, L. Popovic and P. Rafanelli
Water masers in NLS1 galaxies
PoS(NLS1)031 pdf A. Tarchi, P. Castangia, A. Columbano, F. Panessa and J.A. Braatz
High Energy Emission, Jets and Outflows
An X-ray view of NLS1 (invited)
PoS(NLS1)016 file missing A.C Fabian
The X-ray weak state of Narrow-Line Seyfert 1 galaxies
PoS(NLS1)017 pdf L. Gallo
X-ray signatures of circumnuclear gas in AGN
PoS(NLS1)018 file missing T.J. Turner
X-ray reverberation in NLS1
PoS(NLS1)019 pdf L. Miller and T.J. Turner
X-ray reverberation delays in NLS1
PoS(NLS1)020 file missing A. Zoghbi
The average hard X-ray spectrum of NLS1
PoS(NLS1)021 pdf C. Ricci
The INTEGRAL Narrow-Line Seyfert 1 Galaxies
PoS(NLS1)022 pdf F. Panessa, A. De Rosa, L. Bassani, A. Bazzano, T. Bird, R. Landi, A. Malizia, G. Miniutti, M. Molina and P. Ubertini
Evidence of powerful relativistic jets in narrow-line Seyfert 1 galaxies
PoS(NLS1)024 pdf L. Foschini
Global eVLBI observations of J0948+0022
PoS(NLS1)051 pdf M. Giroletti, Z. Paragi, H.E. Bignall, A. Doi, L. Foschini, K. Gabányi and C. Reynolds
Long-term multiwavelength properties of PKS 0558-504, a highly accreting BH with a radio jet
PoS(NLS1)025 file missing M. Gliozzi
Gamma-ray NLSy1s and 'classical' blazars: are they different at radio cm/mm bands?
PoS(NLS1)026 pdf L. Fuhrmann
Mass outflows in Narrow-Line Seyfert 1 Galaxies
PoS(NLS1)027 pdf M.D. Crenshaw
Outflowing clouds in the NLS1 Mrk 766
PoS(NLS1)028 file missing G. Risaliti
Contemporaneous Chandra HETG and Suzaku X-ray observations of NGC 4051
PoS(NLS1)029 file missing A. Lobban
Disentangling the complex absorption spectrum of NGC 7314
PoS(NLS1)030 file missing J. Ebrero
Masses, Host Galaxies, Evolution
Masses of Black Holes in Active Galactic Nuclei: Implications for Narrow-Line Seyfert 1 Galaxies'' (invited)
PoS(NLS1)032 pdf B. Peterson
Black hole scaling relationships and NLS1s
PoS(NLS1)033 pdf M. Bentz
Addressing systematic uncertainties in black hole mass measurements
PoS(NLS1)034 pdf K. Denney, R.J. Assef, M. Bentz, M. Dietrich, K. Horne, C.S. Kochanek, S. Mathur, B. Peterson, R.W. Pogge and M. Vestergaard
Host galaxies of NLS1s
PoS(NLS1)035 pdf S. Mathur
Past and present secular evolution in the host galaxies of NLS1s
PoS(NLS1)036 pdf G. Orban de Xivry, R. Davies, M. Schartmann, S. Komossa, A. Marconi, E. Hicks, H. Engel and L. Tacconi
Cosmic Evolution of NLS1 and the Growth of their Black Holes
PoS(NLS1)037 file missing R. Davies
Black hole mass estimations: limitations and uncertainties
PoS(NLS1)038 pdf M. Vestergaard, K. Denney, X. Fan, J.J. Jensen, B.C. Kelly, P.S. Osmer, B. Peterson and C.A. Tremonti
The overall uncertainty of single-epoch virial black hole mass estimators and its implication to the M-sigma relation
PoS(NLS1)039 pdf J.H. Woo and D. Park
The effect of radiation pressure on virial black hole mass estimates: the case of narrow line Seyfert 1 galaxies
PoS(NLS1)040 file missing A. Marconi
BH masses in NLS1: the role of the broad-line region geometry
PoS(NLS1)041 pdf R. Decarli, M. Dotti, F. Haardt and S. Zibetti
On the BH-galaxy relation of AGN and NLS1
PoS(NLS1)042 pdf A. Wandel
Mass determination of the supermassive black hole of NGC 4051 Seyfert 1 galaxy based on X-ray spectrum fitting with generic Comptonization model
PoS(NLS1)043 file missing A. Chekhtman
Rest optical spectroscopy of FeLoBALs and LoBALs at intermediate redshift
PoS(NLS1)044 pdf K. Aoki
X-ray properties of a sample of NLS1 selected from the SDSS
PoS(NLS1)046 pdf N. Castello-Mor
X-ray selected Narrow-Line Seyfert 1 Galaxies
PoS(NLS1)066 pdf A. Caccianiga, P. Severgnini, R. Della Ceca, A. Corral, R. Fanali and E. Marchese
Gamma-ray variability of radio-loud narrow-line Seyfert 1 galaxies
PoS(NLS1)045 pdf G. Calderone
Modelling the full X-ray spectra of MGC -6-30-15 with a relativistic reflection model
PoS(NLS1)048 pdf C.Y. Chiang and A.C Fabian
Narrow-Line Seyfert 1s: a luminosity dependent definition
PoS(NLS1)012 pdf D. Dultzin
Optical polarization observations of RL NLS1 Galaxies
PoS(NLS1)049 pdf J. Eggen, H.R. Miller and J. Maune
Are Narrow-Line Seyfert 1 Galaxies viewed pole-on?
PoS(NLS1)050 pdf T. Fischer, M.D. Crenshaw, S.B. Kraemer and H.R. Schmitt
New results in reverberation mapping
PoS(NLS1)052 pdf C. Grier, B. Peterson, K. Denney, M. Bentz and R.W. Pogge
WPVS 007 and Mkn 335: the link between NLS1s and BAL QSOs
PoS(NLS1)053 pdf D. Grupe
Is the SDSS J094533.99+100950.1 higher mass equivalent to narrow-line Seyfert 1 galaxies?
PoS(NLS1)055 pdf K. Hryniewicz
Radio properties of Narrow-Line Seyfert 1 Galaxies
PoS(NLS1)023 file missing S. Komossa
Inhomogeneous partial covering in Markarian 766
PoS(NLS1)057 file missing A.C. Liebmann
The properties of nearby BL Lac Objects with optical jets
PoS(NLS1)058 pdf E. Liuzzo, R. Falomo and A. Treves
A search for rapid optical variations in very radio-loud narrow-line Seyfert galaxies
PoS(NLS1)059 pdf J. Maune
Narrow-Line AGNs: confirming the relationship between metallicity and accretion rate
PoS(NLS1)065 pdf attachments D. Neri-Larios, R. Coziol, J.P. Torres-Papaqui, H. Andernach, J.M. Islas-Islas, I. Plauchu-Frayn and R.A. Ortega-Minakata
A preliminary census of soft excess occurrence from a small sample of RL-NLSy1
PoS(NLS1)060 pdf L. Pacciani
X-ray study of narrow line Seyfert 1 galaxies with strong Fe II emission
PoS(NLS1)061 file missing E. Piconcelli
Implications from the optical to UV flux ratio of FeII emission in SDSS DR7 quasars
PoS(NLS1)062 pdf H. Sameshima
High-energy emission from NGC 5506, the brightest hard X-ray NLS1
PoS(NLS1)063 pdf S. Soldi, V. Beckmann, N. Gehrels, S. De Jong and P. Lubinski
Variability, optical-to-X-ray slope and accretion disc properties in a sample of Seyfert 1s
PoS(NLS1)007 pdf R. Vasudevan, L. Gallo, D. Robertson and K. Fulford
MERLIN 18cm observations of intermediate redshift NLS1 galaxies
PoS(NLS1)064 pdf J. Zuther, S. Fischer and A. ECKART