SDSS J143244.91+301435.3: a link between radio-loud narrow-line Seyfert 1 galaxies and compact steep-spectrum radio sources?
Alessandro Caccianiga,Sonia Anton,Sonia Anton,Lucía Ballo,Daniele Dallacasa,Daniele Dallacasa,R. Della Ceca,R. Fanali,Luigi Foschini,Timothy S. Hamilton,Alexander Kraus,Tommaso Maccacaro,Karl-Heinz Mack,M. J. M. Marchã,Ana Paulino-Afonso,Eleonora Sani,Paola Severgnini +16 more
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TLDR
In this article, the authors presented SDSSJ143244.91+301435.3, a new case of radio-loud narrow line Seyfert 1 (RL NLS1) with a relatively high radio power (P1.4GHz=2.1x10^25 W Hz^-1) and large radioloudness parameter (R 1.4=600+/-100).Abstract:
We present SDSSJ143244.91+301435.3, a new case of radio-loud narrow line Seyfert 1 (RL NLS1) with a relatively high radio power (P1.4GHz=2.1x10^25 W Hz^-1) and large radioloudness parameter (R1.4=600+/-100). The radio source is compact with a linear size below ~1.4 kpc but, contrary to most of the RL NLS1 discovered so far with such a high R1.4, its radio spectrum is very steep (alpha=0.93) and not supporting a 'blazar-like' nature. Both the small mass of the central super-massive black-hole and the high accretion rate relative to the Eddington limit estimated for this object (3.2x10^7 Msun and 0.27, respectively, with a formal error of ~0.4 dex on both quantities) are typical of the class of NLS1. Through a modeling of the spectral energy distribution of the source we have found that the galaxy hosting SDSSJ143244.91+301435.3 is undergoing a quite intense star-formation (SFR=50 Msun y^-1) which, however, is expected to contribute only marginally (~1 per cent) to the observed radio emission. The radio properties of SDSSJ143244.91+301435.3 are remarkably similar to those of compact steep spectrum (CSS) radio sources, a class of AGN mostly composed by young radio galaxies. This may suggest a direct link between these two classes of AGN, with the CSS sources possibly representing the misaligned version (the so-called parent population) of RL NLS1 showing blazar characteristics.read more
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Journal ArticleDOI
The Black Hole Mass–Stellar Velocity Dispersion Relation of Narrow-line Seyfert 1 Galaxies
TL;DR: In this paper, the authors investigate the relation of NLS1s in comparison with broad-line AGNs and find no strong evidence that the NLS 1s deviates from the relation, which is defined by reverberation-mapped type 1 AGNs.
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Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
Luigi Foschini,Marco Berton,Alessandro Caccianiga,Stefano Ciroi,Valentina Cracco,Bradley M. Peterson,E. Angelakis,V. Braito,Lars Fuhrmann,Luigi C. Gallo,Dirk Grupe,Emilia Järvelä,S. Kaufmann,S. Komossa,Yuri Y. Kovalev,Yuri Y. Kovalev,Anne Lähteenmäki,Mikhail M. Lisakov,Matthew L. Lister,Smita Mathur,J. L. Richards,P. Romano,A. Sievers,Gianpiero Tagliaferri,Joni Tammi,Omar Tibolla,Omar Tibolla,Merja Tornikoski,S. Vercellone,G. La Mura,L. Maraschi,Piero Rafanelli +31 more
TL;DR: In this article, the authors conducted a multi-wavelength survey of 42 radio loud narrow-1ine Seyfert 1 galaxies (RLNLS1s), selected by searching among all the known sources of this type and omitting those with steep radio spectra.
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Searching for the Physical Drivers of the Eigenvector 1 Correlation Space
TL;DR: In this article, a search for the most important physical parameters that are likely to govern correlations and data point distribution in E1 space was conducted, focusing on the principal optical parameter plane involving the width of the H-β broad component and the equivalent width ratio between the FeII blend at 4570 A and H-beta broad component.
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Compact steep-spectrum and peaked-spectrum radio sources
TL;DR: In this article, the authors reviewed the multi-frequency observational properties and current theories of radio sources with emphasis on developments since the earlier review of O'Dea (PASP 110:493-532, https://doi.org/10.1086/316162, 1998).
References
More filters
Journal ArticleDOI
The wide-field infrared survey explorer (wise): mission description and initial on-orbit performance
Edward L. Wright,Peter Eisenhardt,Amy Mainzer,Michael E. Ressler,Roc M. Cutri,Thomas H. Jarrett,J. Davy Kirkpatrick,Deborah L. Padgett,Robert S. McMillan,Michael F. Skrutskie,Spencer A. Stanford,Spencer A. Stanford,Martin Cohen,Russell G. Walker,John C. Mather,David Leisawitz,Thomas N. Gautier,Ian S. McLean,Dominic J. Benford,Carol J. Lonsdale,Andrew Blain,B. Mendez,William R. Irace,Valerie G. Duval,Fengchuan Liu,Don Royer,I. Heinrichsen,Joan Howard,Mark A. Shannon,Martha Kendall,Amy L. Walsh,Mark F. Larsen,Joel Cardon,Scott Schick,Mark Schwalm,Mohamed Abid,Beth Fabinsky,Larry Naes,Chao-Wei Tsai +38 more
TL;DR: The Wide-field Infrared Survey Explorer (WISE) is mapping the whole sky following its launch on 14 December 2009 and completed its first full coverage of the sky on July 17 as discussed by the authors.
Journal ArticleDOI
Star formation in galaxies along the hubble sequence
TL;DR: In this article, the authors focus on the broad patterns in the star formation properties of galaxies along the Hubble sequence and their implications for understanding galaxy evolution and the physical processes that drive the evolution.
Journal ArticleDOI
The NRAO VLA Sky Survey
James J. Condon,W. D. Cotton,Eric W. Greisen,Q. F. Yin,Richard A. Perley,G. B. Taylor,J. J. Broderick +6 more
TL;DR: The NRAO VLA Sky Survey (NVSS) covers the sky north of J2000 at 1.4 GHz as discussed by the authors, including a set of 2326 4?? 4? continuum cubes with three planes containing Stokes I, Q, and U images plus a catalog of almost 2? 106 discrete sources stronger than S 2.5 mJy.
Journal ArticleDOI
Unified Schemes for Radio-Loud Active Galactic Nuclei
C. Megan Urry,Paolo Padovani +1 more
TL;DR: In this paper, the authors describe the radio-loud active galactic nuclei (AGN) classification and general properties of AGN, including radio galaxies, quasars, and blazars.
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