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
N1 - Publisher Copyright:
© Copyright owned by the author(s).
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
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AN - SCOPUS:85053316461
SN - 1824-8039
VL - 126
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 2011 Narrow-Line Seyfert 1 Galaxies and their Place in the Universe, NLS1 2011
Y2 - 4 April 2011 through 6 April 2011
ER -