Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17041b&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Selecting on the basis of morphological type, distance, blue luminosity and degree of isolation, Torres et al. (2002, in prep.) have used the nearby optical galaxy catalog of Giuricin et al. (2000 ApJ 543, 178) to obtain a sample of candidate quasar remnants within 50 Mpc especially suitable for comparison with the arrival directions of ultra-high energy cosmic rays (UHECRs). We investigate preliminary evidence for a correlation with this population of objects. Physical attributes of special interest associated with these specific galaxies are examined. In particular, we use stellar velocity dispersions in the bulge to infer the mass of the black hole at the galactic core, compare this supermassive black hole mass to that of the bulge, and identify electromagnetic radiation level/limits associated with the nucleus. Using these physical constraints, we evaluate the feasibility of producing UHECRs via the putative compact black-hole dynamos hosted by these quasar remnants, such as in the scenario investigated by Boldt and Loewenstein (2000 MNRAS 316, L29) and by Levinson (2000 Phys. Rev. Lett. 85, 912).
Boldt Elihu
Hamilton Timothy
Loewenstein Michael
Torres Diego
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