202 citations · 2.6k across the 96 of their papers we have counts for
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The Mass Assembly of Fossil Groups of Galaxies in the Millennium Simulation
Ali Dariush, Habib G. Khosroshahi, Trevor J. Ponman +3
The evolution of present-day fossil galaxy groups is studied in the Millennium Simulation. Using the corresponding Millennium gas simulation and semi-analytic galaxy catalogues, we…
Scaling relations in fossil galaxy groups
Habib G. Khosroshahi, Trevor J. Ponman, Laurence R. Jones
Using Chandra X-ray observations and optical imaging and spectroscopy of a flux-limited sample of 5 fossil groups, supplemented by additional systems from the literature, we provid…
The central elliptical galaxy in fossil groups and formation of BCGs
Habib G. Khosroshahi, Trevor. J. Ponman, Laurence R. Jones
We study the dominant central giant elliptical galaxies in ``Fossil groups'' using deep optical (R-band) and near infrared (Ks-band) photometry. These galaxies are as luminous as t…
A fossil galaxy cluster; an X-ray and optical study of RX J1416.4+2315
Habib G. Khosroshahi, Ben J. Maughan, Trevor J. Ponman +1
We present a detailed X-ray and optical study of a distant fossil system RX J1416.4+2315 (z=0.13), combining Chandra and XMM-Newton observations, optical photometry and spectroscop…
The colour-magnitude relations of ClJ1226.9+3332, a massive cluster of galaxies at z=0.89
S. C. Ellis, L. R. Jones, D. Donovan +2
(Abridged) The colour-magnitude relations of one of the most massive, high redshift clusters of galaxies known have been studied. Photometry has been measured in the V, R, I, z, F6…
An old galaxy group: Chandra X-ray observations of the nearby fossil group NGC 6482
Habib Khosroshahi, Laurence Jones, Trevor Ponman
We present the first detailed X-ray observations, using Chandra, of NGC 6482 - the nearest known `fossil group'. The group is dominated by an optically luminous giant elliptical ga…
Scaling relations in early-type galaxies belonging to groups
H. G. Khosroshahi, S. Raychaudhury, T. J. Ponman +2
We present a photometric analysis of a large sample of early-type galaxies in 16 nearby groups, imaged with the Wide-Field Camera on the Isaac Newton Telescope. Using a two-dimensi…
Star Formation in the Interacting Pair NGC7733/34
M. Jahan-Miri, H. G. Khosroshahi
The problem of star formation within the interacting pair NGC7733/34 has been studied, based on the UBVRI photometry of the source. The distribution of the colors of selected regio…
A near infrared photometric plane for ellipticals and bulges of spirals
Habib G. Khosroshahi, Yogesh Wadadekar, Ajit Kembhavi +1
We report the existence of a single plane in the space of global photometric parameters describing elliptical galaxies and the bulges of early type spiral galaxies. The three param…
Correlations among global photometric properties of disk galaxies
Habib G. Khosroshahi, Yogesh Wadadekar, Ajit Kembhavi
Using a two-dimensional galaxy image decomposition technique, we extract global bulge and disk parameters for a complete sample of early type disk galaxies in the near infrared K b…
Angular momentum transfer to a star by gravitational waves
H. G. Khosroshahi, Y. Sobouti
Interaction of a stochastic background of gravitational radiation with celestial systems changes their dynamical elements in a random manner and give rise to secular changes in tim…