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Date and Time of the Query: 2019-06-19 T08:37:38 PDT
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For refcode 2014MNRAS.444.2700D:
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Copyright by Royal Astronomical Society. 2014MNRAS.444.2700D Depleted cores, multicomponent fits, and structural parameter relations for luminous early-type galaxies Dullo, Bililign T.; Graham, Alister W. Abstract. New surface brightness profiles from 26 early-type galaxies with suspected partially depleted cores have been extracted from the full radial extent of Hubble Space Telescope images. We have carefully quantified the radial stellar distributions of the elliptical galaxies using the core-Sersic model whereas for the lenticular galaxies a core-Sersic bulge plus an exponential disc model gives the best representation. We additionally caution about the use of excessive multiple Sersic functions for decomposing galaxies and compare with past fits in the literature. The structural parameters obtained from our fitted models are, in general, in good agreement with our initial study using radially limited (R <~ 10 arcsec) profiles, and are used here to update several 'central' as well as 'global' galaxy scaling relations. We find near-linear relations between the break radius R_b_ and the spheroid luminosity L such that R_b_ is proportional to L^1.13+/-0.13^, and with the supermassive black hole mass M_BH_ such that R_b is proportional to M_BH^{0.83 +/- 0.21}. This is internally consistent with the notion that major, dry mergers add the stellar and black hole mass in equal proportion, i.e. M_BH_ is proportional to L. In addition, we observe a linear relation R_b is proportional to R_e^{0.98 +/- 0.15} for the core-Sersic elliptical galaxies - where R_e_ is the galaxies' effective half-light radii - which is collectively consistent with the approximately linear, bright-end of the curved L-R_e_ relation. Finally, we measure accurate stellar mass deficits M_def_ that are in general 0.5-4 M_BH_, and we identify two galaxies (NGC 1399, NGC 5061) that, due to their high M_def_/M_BH_ ratio, may have experienced oscillatory core-passage by a (gravitational radiation)-kicked black hole. The galaxy scaling relations and stellar mass deficits favour core-Sersic galaxy formation through a few 'dry' major merger events involving supermassive black holes such that M_def is proportional to M_BH^{3.70 +/- 0.76}, for M_BH_ >~ 2 x 10^8^ M_sun_. Key words: galaxies: elliptical and lenticular, cD, galaxies: fundamental parameters, galaxies: nuclei, galaxies: photometry, galaxies: structure
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