BeppoSAX unveils the nuclear component in NGC 6240

P. Vignati, S. Molendi, G. Matt, M. Guainazzi, L. A. Antonelli, L. Bassani, William Nielsen Brandt, A. C. Fabian, K. Iwasawa, R. Maiolino, G. Malaguti, A. Marconi, G. G. Perola

Research output: Contribution to journalReview article

136 Citations (Scopus)

Abstract

The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed by BeppoSAX. It is seen through an absorber with NH ∼ 2 × 1024 cm-2. The 2-10 keV X-ray luminosity of > 1044 erg s-1 definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical LX/Lbol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.

Original languageEnglish (US)
JournalAstronomy and Astrophysics
Volume349
Issue number2
StatePublished - Dec 1 1999

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galaxies
Infrared Astronomy Satellite
erg
quasars
absorbers
x rays
luminosity
output
energy

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Vignati, P., Molendi, S., Matt, G., Guainazzi, M., Antonelli, L. A., Bassani, L., ... Perola, G. G. (1999). BeppoSAX unveils the nuclear component in NGC 6240. Astronomy and Astrophysics, 349(2).
Vignati, P. ; Molendi, S. ; Matt, G. ; Guainazzi, M. ; Antonelli, L. A. ; Bassani, L. ; Brandt, William Nielsen ; Fabian, A. C. ; Iwasawa, K. ; Maiolino, R. ; Malaguti, G. ; Marconi, A. ; Perola, G. G. / BeppoSAX unveils the nuclear component in NGC 6240. In: Astronomy and Astrophysics. 1999 ; Vol. 349, No. 2.
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abstract = "The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed by BeppoSAX. It is seen through an absorber with NH ∼ 2 × 1024 cm-2. The 2-10 keV X-ray luminosity of > 1044 erg s-1 definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical LX/Lbol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.",
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Vignati, P, Molendi, S, Matt, G, Guainazzi, M, Antonelli, LA, Bassani, L, Brandt, WN, Fabian, AC, Iwasawa, K, Maiolino, R, Malaguti, G, Marconi, A & Perola, GG 1999, 'BeppoSAX unveils the nuclear component in NGC 6240', Astronomy and Astrophysics, vol. 349, no. 2.

BeppoSAX unveils the nuclear component in NGC 6240. / Vignati, P.; Molendi, S.; Matt, G.; Guainazzi, M.; Antonelli, L. A.; Bassani, L.; Brandt, William Nielsen; Fabian, A. C.; Iwasawa, K.; Maiolino, R.; Malaguti, G.; Marconi, A.; Perola, G. G.

In: Astronomy and Astrophysics, Vol. 349, No. 2, 01.12.1999.

Research output: Contribution to journalReview article

TY - JOUR

T1 - BeppoSAX unveils the nuclear component in NGC 6240

AU - Vignati, P.

AU - Molendi, S.

AU - Matt, G.

AU - Guainazzi, M.

AU - Antonelli, L. A.

AU - Bassani, L.

AU - Brandt, William Nielsen

AU - Fabian, A. C.

AU - Iwasawa, K.

AU - Maiolino, R.

AU - Malaguti, G.

AU - Marconi, A.

AU - Perola, G. G.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed by BeppoSAX. It is seen through an absorber with NH ∼ 2 × 1024 cm-2. The 2-10 keV X-ray luminosity of > 1044 erg s-1 definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical LX/Lbol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.

AB - The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed by BeppoSAX. It is seen through an absorber with NH ∼ 2 × 1024 cm-2. The 2-10 keV X-ray luminosity of > 1044 erg s-1 definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical LX/Lbol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.

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M3 - Review article

AN - SCOPUS:0002297247

VL - 349

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 2

ER -

Vignati P, Molendi S, Matt G, Guainazzi M, Antonelli LA, Bassani L et al. BeppoSAX unveils the nuclear component in NGC 6240. Astronomy and Astrophysics. 1999 Dec 1;349(2).