The HST ultraviolet spectrum of the nucleus of NGC 1275: Fermi-accelerated Lyalpha emission

Details The HST ultraviolet spectrum of the nucleus of NGC 1275: Fermi-accelerated Lyalpha emission The HST ultraviolet spectrum of the nucleus of NGC 1275: Fermi-accelerated Lyalpha emission

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.273..625j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 273, Issue 3, pp. 625-631.

Astronomy and Astrophysics

Astronomy

9

Line: Profiles, Galaxies: Active, Cooling Flows, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Individual: Ngc 1275, Ultraviolet Galaxies

Scientific paper

We present an HST FOS spectrum of the nucleus of NGC 1275. The narrow part of the Lyalpha line is double-peaked, with one emission line centred at the systemic velocity of the 5000 km s^-1 system and the other blueshifted by ~450 km s^-1. We show that the short-wavelength component is probably formed by Fermi acceleration across a shock front. The conditions required for this process occur in the inner parts of cooling flows.

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