Probing the Balance of AGN and Star-forming Activity at z 0 with ChaMP

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The combination of the SDSS and the Chandra Multiwavelength Project (ChaMP) offers the currently largest sample of nearby galaxies that can be investigated in terms of the relation between X-ray nuclear emission, nebular line-emission, black hole masses, and properties of the associated stellar populations. We present here novel constraints that both X-ray luminosity and X-ray spectral estimates of the neutral hydrogen column density bring to the evolutionary sequence H II ->
Seyfert/Transition Object -> LINER, suggested by optical data, and discuss implications to the degree to which the local low luminosity AGN phenomenon fits into the massive black-hole/spheroid co-evolution paradigm.

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