IUCAA Preprints

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Author: search.filters.author.Iqbal, NaseerHas files: Yes

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    Peculiar motions of galaxy clusters: correlation function approach
    (IUCAA, 2015-02) Iqbal, Naseer; Masood, Tabasum; Hamid, Mubashir et.all
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    The peculiar velocity and temperature profile of galaxy clusters
    (IUCAA, 2015-02) Masood, Tabasum; Iqbal, Naseer
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    Some earliest ancient astronomical observatories in Kashmir (India)
    (2008-03) Iqbal, Naseer
    We identify some ancient observatories in the north-west belt of Kashmir (India) and predict that the Site Bumai Sopore as the oldest one in this region belonging to the upper Paleolithic period. All the sites fall in the respective periods of Neolithic, Paleolithic and upper Paleolithic. Detail practices of state-regulated the Meteor impact, supernova, change of seasons in a year and others. This paper reports the earliest structures that support those carvings.
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    Probable meteor impact crater in Kashmir Vally (India)
    (2008-03) Iqbal, Naseer
    Dal lake in Srinagar Kashmir (India) which falls towards south is a lake surrounded by mountains on its three sides with a latitude of 340 2` north and longitude 740 4` east, is a probable meteor impact crater, almost Basin shaped and is spread over an area of 12 sq k ms. In this paper we report some preliminary bservations about it and invite the attention of international community of scientists towards its existence and studies and to establish finally whether or not it is a meteor impact crater.
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    Entropy changes in the clustering of galaxies in an expanding universe
    (2011-05-26) Iqbal, Naseer; Khan, Mohammad Shafi; Masood, Tabasum
    In the present work the approach-thermody-namics and statistical mechanics of gravitating systems is applied to study the entropy changein gravitational clustering of galaxies in an ex-panding universe. We derive analytically the expressions for gravitational entropy in terms of temperature T and average density n of the par-ticles (galaxies) in the given phase space cell. It is found that during the initial stage of cluster-ing of galaxies, the entropy decreases and finally seems to be increasing when the system attains virial equilibrium. The entropy changes are studied for different range of measuring correlation parameter b. We attempt to provide a clearer account of this phenomena. The entropy esults for a system consisting of extended mass (non-point mass) particles show a imilar behaviour with that of point mass particles clustering gravitationally in an expanding uni-verse.