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Lenticular Galaxy Formation - Possible Luminosity Dependence

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arxiv astro-ph/0703657 v2 pith:XCEIZRQE submitted 2007-03-26 astro-ph

Lenticular Galaxy Formation - Possible Luminosity Dependence

Sudhanshu Barway (1) , Ajit Kembhavi (1) , Yogesh Wadadekar (2) , C.D. Ravikumar (3) , Y. D. Mayya (4)(1- Inter University center for Astronomy , Astrophysics (IUCAA) , Pune-India; 2- Department of Astrophysical Sciences , Princeton University
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Princeton; 3- Department of Physics University of Calicut Kerala-India; 4- Instituto Nacional de Astrofisica Optica y Electronica Puebla-Mexico)
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keywords correlationdifferentdiskformationgalaxiesgalaxylenticularlenticulars
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We investigate the correlation between the bulge effective radius (r_e) and disk scale length (r_d), in the near-infrared K band for lenticular galaxies in the field and in clusters. We find markedly different relations between the two parameters as a function of luminosity. Lenticulars with total absolute magnitude fainter than M_T = -24.5 show a positive correlation, in line with predictions of secular formation processes for the pseudo bulges of late-type disk galaxies. But brighter lenticulars with M_T < -24.5 show an anti-correlation, indicating that they formed through a different mechanism. The available data are insufficient to reliably determine the effect of galaxy environment on this correlation.

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Cited by 2 Pith papers

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  1. Too many quiescent late-type galaxies or a matter of misclassification?

    astro-ph.GA 2026-07 accept novelty 6.0

    Quiescent late-type galaxies in SDSS morphological catalogues are overestimated by a factor of ~2 due to misclassified edge-on S0 galaxies.

  2. Fuelling the central region of galaxies with misaligned gas accretion

    astro-ph.GA 2026-07 conditional novelty 6.0

    Kinematically misaligned gas accretion sustains main-sequence-level star formation only below ~1e10 Msun; above that, central gas is present but dilution by pre-existing mass keeps specific star formation low.