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

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.

Sessions
Welcome
General Properties, Surveys
High Energy Emission, Jets and Outflows
Masses, Host Galaxies, Evolution
Poster

Welcome

Welcome PoS(NLS1)001 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 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 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 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 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 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 G. Risaliti

Contemporaneous Chandra HETG and Suzaku X-ray observations of NGC 4051 PoS(NLS1)029 A. Lobban

Disentangling the complex absorption spectrum of NGC 7314 PoS(NLS1)030 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 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 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 A. Chekhtman

Poster

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 S. Komossa

Inhomogeneous partial covering in Markarian 766 PoS(NLS1)057 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 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

Communicate with the PoS Editorial Office