Enhanced star formation in Narrow Line Syfert 1 galaxies

Elonora Sani; Dieter Lutz; Guido Risaliti; Hagai Netzer; Lugi Gallo; Benny Trakhtenbrot; Eckhard Sturm; Thomas Boller

Enhanced star formation in Narrow Line Syfert 1 galaxies

Elonora Sani, Dieter Lutz, Guido Risaliti, Hagai Netzer, Lugi Gallo, Benny Trakhtenbrot, Eckhard Sturm, Thomas Boller

School of Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present new Spitzer mid-IR spectroscopy of local NLS1s. We detect strong AGN continuum in all and clear PAH emission in 70% of the sources. The PAH luminosity spans three orders of magnitude, from ∼ 10³⁹ to ∼ 10⁴² erg/s, providing strong evidence for intense ongoing star formation in the circumnuclear regions of NLS1s. We constructed NLS1 and BLS1 subsamples to compare them in various ways. The comparison shows a clear separation according to FWHM such that objects with narrower broad Hβ lines are the strongest PAH emitters. We test this division in various ways trying to remove biases due to luminosity and aperture size. We find that star formation activity around NLS1 AGN is larger than around BLS1 of the same AGN luminosity. The above result seems to hold over the entire range of distance and luminosity. Moreover, the star formation rate is higher in low black hole mass and high L/LEdd systems indicating that black hole growth and star formation are occurring simultaneously.

Original language	English
Journal	Proceedings of Science
Volume	126
State	Published - 2011
Event	2011 Narrow-Line Seyfert 1 Galaxies and their Place in the Universe, NLS1 2011 - Milano, Italy Duration: 4 Apr 2011 → 6 Apr 2011

Cite this

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title = "Enhanced star formation in Narrow Line Syfert 1 galaxies",

abstract = "We present new Spitzer mid-IR spectroscopy of local NLS1s. We detect strong AGN continuum in all and clear PAH emission in 70% of the sources. The PAH luminosity spans three orders of magnitude, from ∼ 1039 to ∼ 1042 erg/s, providing strong evidence for intense ongoing star formation in the circumnuclear regions of NLS1s. We constructed NLS1 and BLS1 subsamples to compare them in various ways. The comparison shows a clear separation according to FWHM such that objects with narrower broad Hβ lines are the strongest PAH emitters. We test this division in various ways trying to remove biases due to luminosity and aperture size. We find that star formation activity around NLS1 AGN is larger than around BLS1 of the same AGN luminosity. The above result seems to hold over the entire range of distance and luminosity. Moreover, the star formation rate is higher in low black hole mass and high L/LEdd systems indicating that black hole growth and star formation are occurring simultaneously.",

author = "Elonora Sani and Dieter Lutz and Guido Risaliti and Hagai Netzer and Lugi Gallo and Benny Trakhtenbrot and Eckhard Sturm and Thomas Boller",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s).; null ; Conference date: 04-04-2011 Through 06-04-2011",

year = "2011",

language = "אנגלית",

volume = "126",

journal = "Proceedings of Science",

issn = "1824-8039",

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TY - JOUR

T1 - Enhanced star formation in Narrow Line Syfert 1 galaxies

AU - Sani, Elonora

AU - Lutz, Dieter

AU - Risaliti, Guido

AU - Netzer, Hagai

AU - Gallo, Lugi

AU - Trakhtenbrot, Benny

AU - Sturm, Eckhard

AU - Boller, Thomas

PY - 2011

Y1 - 2011

N2 - We present new Spitzer mid-IR spectroscopy of local NLS1s. We detect strong AGN continuum in all and clear PAH emission in 70% of the sources. The PAH luminosity spans three orders of magnitude, from ∼ 1039 to ∼ 1042 erg/s, providing strong evidence for intense ongoing star formation in the circumnuclear regions of NLS1s. We constructed NLS1 and BLS1 subsamples to compare them in various ways. The comparison shows a clear separation according to FWHM such that objects with narrower broad Hβ lines are the strongest PAH emitters. We test this division in various ways trying to remove biases due to luminosity and aperture size. We find that star formation activity around NLS1 AGN is larger than around BLS1 of the same AGN luminosity. The above result seems to hold over the entire range of distance and luminosity. Moreover, the star formation rate is higher in low black hole mass and high L/LEdd systems indicating that black hole growth and star formation are occurring simultaneously.

AB - We present new Spitzer mid-IR spectroscopy of local NLS1s. We detect strong AGN continuum in all and clear PAH emission in 70% of the sources. The PAH luminosity spans three orders of magnitude, from ∼ 1039 to ∼ 1042 erg/s, providing strong evidence for intense ongoing star formation in the circumnuclear regions of NLS1s. We constructed NLS1 and BLS1 subsamples to compare them in various ways. The comparison shows a clear separation according to FWHM such that objects with narrower broad Hβ lines are the strongest PAH emitters. We test this division in various ways trying to remove biases due to luminosity and aperture size. We find that star formation activity around NLS1 AGN is larger than around BLS1 of the same AGN luminosity. The above result seems to hold over the entire range of distance and luminosity. Moreover, the star formation rate is higher in low black hole mass and high L/LEdd systems indicating that black hole growth and star formation are occurring simultaneously.

UR - http://www.scopus.com/inward/record.url?scp=85053316461&partnerID=8YFLogxK

M3 - מאמר מכנס

AN - SCOPUS:85053316461

VL - 126

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

Y2 - 4 April 2011 through 6 April 2011

ER -

Enhanced star formation in Narrow Line Syfert 1 galaxies

Abstract

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