Fast outflows and star formation quenching in quasar host galaxies
Por:
Carniani S., Marconi A., Maiolino R., Balmaverde B., Brusa M., Cano-Díaz M., Cicone C., Comastri A., Cresci G., Fiore F., Feruglio C., La Franca F., Mainieri V., Mannucci F., Nagao T., Netzer H., Piconcelli E., Risaliti G., Schneider R., Shemmer O.
Publicada:
1 jul 2016
Resumen:
Negative feedback from active galactic nuclei (AGN) is considered a key
mechanism in shaping galaxy evolution. Fast, extended outflows are
frequently detected in the AGN host galaxies at all redshifts and
luminosities, both in ionised and molecular gas. However, these outflows
are only potentially able to quench star formation, and we are still
lacking decisive evidence of negative feedback in action. Here we
present observations obtained with the Spectrograph for INtegral Field
Observations in the Near Infrared (SINFONI) H- and K-band integral-field
of two quasars at z similar to 2.4 that are characterised by fast,
extended outflows detected through the [OIII]lambda 5007 line. The
high signal-to-noise ratio of our observations allows us to identify
faint narrow (FWHM < 500 km s(-1)) and spatially extended components in
[OIII]lambda 5007 and H alpha emission associated with star formation
in the host galaxy. This star formation powered emission is spatially
anti-correlated with the fast outflows. The ionised outflows therefore
appear to be able to suppress star formation in the region where the
outflow is expanding. However, the detection of narrow spatially
extended H alpha emission indicates star formation rates of at least
similar to 50-90 M-circle dot yr(-1), suggesting either that AGN
feedback does not affect the whole galaxy or that many feedback episodes
are required before star formation is completely quenched. On the other
hand, the narrow H alpha emission extending along the edges of the
outflow cone may also lead also to a positive feedback interpretation.
Our results highlight the possible double role of galaxy-wide outflows
in host galaxy evolution.
Filiaciones:
Carniani S.:
Univ Florence, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy
INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England
Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, Sesto Fiorentino (Firenze), 50019, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, 50125, Italy
Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Ave., Cambridge, CB3 0HE, United Kingdom
Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom
Marconi A.:
Univ Florence, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy
INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, Sesto Fiorentino (Firenze), 50019, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, 50125, Italy
Maiolino R.:
Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England
Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Ave., Cambridge, CB3 0HE, United Kingdom
Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom
Balmaverde B.:
Univ Florence, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy
Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, Sesto Fiorentino (Firenze), 50019, Italy
Brusa M.:
Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy
INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy
Dipartimento di Fisica e Astronomia, Università di Bologna, viale Berti Pichat 6/2, Bologna, 40127, Italy
INAF, Osservatorio Astronomico di Bologna, via Ranzani 1, Bologna, 40127, Italy
Cano-Díaz M.:
Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 70-264, México D.F., 04510, Mexico
Cicone C.:
ETH, Dept Phys, Inst Astron, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland
Institute for Astronomy, Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 27, Zurich, 8093, Switzerland
Comastri A.:
INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy
INAF, Osservatorio Astronomico di Bologna, via Ranzani 1, Bologna, 40127, Italy
Cresci G.:
INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, 50125, Italy
Fiore F.:
INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy
INAF, Osservatorio Astronomico di Roma, via Frascati 33, Monteporzio Catone, 00040, Italy
Feruglio C.:
INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy
Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy
IRAM Inst RadioAstron Millimetr, 300 Rue Piscine, F-38406 St Martin Dheres, France
INAF, Osservatorio Astronomico di Roma, via Frascati 33, Monteporzio Catone, 00040, Italy
Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy
IRAM-Institut de RadioAstronomie Millimétrique, 300 rue de la Piscine, Saint-Martin d Hères, 38406, France
La Franca F.:
Univ Rome Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy
Dipartimento di Matematica e Fisica, Università Roma Tre, via della Vasca Navale 84, Roma, 00146, Italy
Mainieri V.:
European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
European Southern Observatory, Karl-Schwarzschild-Str. 2, Garching bei München, 85748, Germany
Mannucci F.:
INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, 50125, Italy
Nagao T.:
Ehime Univ, Res Ctr Space & Cosm Evolut, Bunkyo Cho 2-5, Matsuyama, Ehime 7908577, Japan
Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho 2-5, Matsuyama, Ehime, 790-8577, Japan
Netzer H.:
Tel Aviv Univ, Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
School of Physics and Astronomy, Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv, 69978, Israel
Piconcelli E.:
INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy
INAF, Osservatorio Astronomico di Roma, via Frascati 33, Monteporzio Catone, 00040, Italy
Risaliti G.:
INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, 50125, Italy
Schneider R.:
INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy
INAF, Osservatorio Astronomico di Roma, via Frascati 33, Monteporzio Catone, 00040, Italy
Shemmer O.:
Univ North Texas, Dept Phys, Denton, TX 76203 USA
Department of Physics, University of North Texas, Denton, TX 76203, United States
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