NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-18 T09:31:52 PDT
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For refcode 2014ApJ...788L..39F:
Retrieve 189 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2014ApJ...788L..39F Are (Pseudo)bulges in Isolated Galaxies Actually Primordial Relics? Fernandez Lorenzo, M.; Sulentic, J.; Verdes-Montenegro, L.; Blasco-Herrera, J.; Argudo-Fernandez, M.; Garrido, J.; Ramirez-Moreta, P.; Ruiz, J. E.; Sanchez-Exposito, S.; Santander-Vela, J. D. Abstract. We present structural parameters and (g - i) bulge/disk colors for a large sample (189) of isolated AMIGA galaxies. The structural parameters of bulges were derived from the two-dimensional bulge/disk/bar decomposition of Sloan Digital Sky Survey i-band images using GALFIT. Galaxies were separated between classical bulges (n_b_ > 2.5) and pseudobulges (n_b_ < 2.5), resulting in a dominant pseudobulge population (94%) with only 12 classical bulges. In the langmu_ e_rang-R_e_ plane, pseudobulges are distributed below the elliptical relation (smaller R_e_ and fainter mu_ e_), with the closest region to the Kormendy relation populated by those pseudobulges with larger values of B/T. We derived (g - i) bulge colors using aperture photometry and find that pseudobulges show median colors (g - i)_ b_ ~ 1.06, while their associated disks are much bluer, (g - i)_ d_ ~ 0.77. Moreover, 64% (113/177) of pseudobulges follow the red sequence of early-type galaxies. Bluer pseudobulges tend to be located in galaxies with the highest likelihood of tidal perturbation. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch and not much subsequent growth. Properties of bulges in isolated galaxies contrast with a picture where pseudobulges grow continuously via star formation. They also suggest that environment could be playing a role in rejuvenating the pseudobulges. Key words: galaxies: fundamental parameters, galaxies: general, galaxies: interactions
Retrieve 189 NED objects in this reference.
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