NDLI: The mix of disky and boxy ellipticals

Content Provider	Springer Nature Link
Author	Khochfar, Sadegh Burkert, Andreas
Copyright Year	2003
Abstract	We use semi-analytical modelling of galaxy formation to predict the mix of elliptical galaxies with boxy and disky isophotes, assuming they originated from major mergers of different mass ratios. Numerical simulations of merging spiral galaxies indicate equal mass mergers leading to boxy and merger with a mass ratio of 3:1 to disky ellipticals. Assigning isophotal shapes to elliptical galaxies in our model we find bright disky ellipticals being as frequent or more frequent as bright boxy ellipticals, in contrast to observations which indicate that most of the bright ellipticals should be boxy. The precursors of bright ellipticals in our model are mainly also ellipticals which merge with each other later. Assuming that the merger of two ellipticals results in boxy ellipticals increases the fraction of bright boxy ellipticals. By defining a disky as a bulge dominated galaxy with an additional disk mass of more than 20% the total baryonic mass, increases the fraction of low mass disky ellipticals and reproduces the observed trend of a steep increase in the fraction of low mass disky ellipticals.
Starting Page	401
Ending Page	404
Page Count	4
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	284
Issue Number	2
e-ISSN	1572946X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Ellipticals with Disky and Boxy Isophotes in High Density Environments

Intrinsic shapes of discy and boxy ellipticals

Dynamical Properties of a Sample of Ellipticals

Strong Balmer lines in old ellipticals

Dust Effects on Kinematic Models of Ellipticals

The ages and metallicities of ellipticals from continuum colors

Is the deficit of Z > 1 field ellipticals real?

Mg/Fe Ratios in Hierarchically-Forming Ellipticals

Abundances in ellipticals traced by globular clusters

The mix of disky and boxy ellipticals

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Ellipticals with Disky and Boxy Isophotes in High Density Environments

Intrinsic shapes of discy and boxy ellipticals

Dynamical Properties of a Sample of Ellipticals

Strong Balmer lines in old ellipticals

Dust Effects on Kinematic Models of Ellipticals

The ages and metallicities of ellipticals from continuum colors

Is the deficit of Z > 1 field ellipticals real?

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