Search Results - "Deep Saini, Tarun"

Exploring the expanding Universe and dark energy using the statefinder diagnostic by Alam, Ujjaini, Sahni, Varun, Deep Saini, Tarun, Starobinsky, A. A.

“…The coming few years are likely to witness a dramatic increase in high-quality supernova data as current surveys add more high-redshift supernovae to their…”
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Is there supernova evidence for dark energy metamorphosis? by Alam, Ujjaini, Sahni, Varun, Deep Saini, Tarun, Starobinsky, A. A.

“…ABSTRACT We reconstruct the equation of state w(z) of dark energy (DE) using a recently released data set containing 172 Type Ia supernovae (SNe) without…”
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Direction dependence in supernova data: constraining isotropy by Gupta, Shashikant, Saini, Tarun Deep

“…We revise and extend the extreme value statistic, introduced in Gupta et al., to study direction dependence in the high-redshift supernova data, arising either…”
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Direction dependence and non-Gaussianity in the high-redshift supernova data by Gupta, Shashikant, Saini, Tarun Deep, Laskar, Tanmoy

“…The most detailed constraints on the accelerating expansion of the universe and the nature of dark energy are derived from the high-redshift supernova data,…”
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Non-Gaussianity and direction-dependent systematics in HST Key Project data by Gupta, Shashikant, Saini, Tarun Deep

“…Two new statistics, namely Δ and Δχ, based on the extreme value theory, were derived by Gupta et al. We use these statistics to study the direction dependence…”
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Reconstructing the cosmic equation of state from supernova distances by Saini, T D, Raychaudhury, S, Sahni, V, Starobinsky, A A

“…Observations of high-redshift supernovae indicate that the Universe is accelerating. Here we present a model-independent method for estimating the form of the…”
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Slow pressure modes in thin accretion discs by Saini, Tarun Deep, Gulati, Mamta, Sridhar, S.

“…Thin accretion discs around massive compact objects can support slow pressure modes of oscillations in the linear regime that have azimuthal wavenumber m= 1…”
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Possible use of self-calibration to reduce systematic uncertainties in determining distance-redshift relation via gravitational radiation from merging binaries by Saini, Tarun Deep, Sethi, Shiv K., Sahni, Varun

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Response of distance measures to the equation of state by Deep Saini, Tarun, Padmanabhan, T., Bridle, Sarah

“…We show that the distance measures (such as the luminosity and angular diameter distances) are linear functionals of the equation of state function w(z) of the…”
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Decoding X-ray observations from centres of galaxy clusters using MCMC by Lakhchaura, Kiran, Saini, Tarun Deep, Sharma, Prateek

“…Traditionally the thermodynamic profiles (gas density, temperature, etc.) of galaxy clusters are obtained by assuming spherical symmetry and modelling…”
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Modal analysis of gravitational instabilities in nearly Keplerian, counter-rotating collisionless discs by Gulati, Mamta, Saini, Tarun Deep

“…We present a modal analysis of instabilities of counter-rotating, self-gravitating collisionless stellar discs, using the recently introduced modified WKB…”
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A modified WKB formulation for linear eigenmodes of a collisionless self-gravitating disc in the epicyclic approximation by Gulati, Mamta, Saini, Tarun Deep

“…The short-wave asymptotics (WKB) of spiral density waves in self-gravitating stellar discs is well suited for the study of the dynamics of tightly-wound…”
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Erratum: Decoding X-ray observations from centres of galaxy clusters using MCMC by Lakhchaura, Kiran, Saini, Tarun Deep, Sharma, Prateek

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Reconstructing the properties of dark energy using standard sirens by Arabsalmani, Maryam, Sahni, Varun, Saini, Tarun Deep

“…Future space-based gravity wave (GW) experiments such as the Big Bang Observatory (BBO), with their excellent projected, one sigma angular resolution, will…”
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Non-Gaussianity and direction-dependent systematics inHSTKey Project data by Gupta, Shashikant, Saini, Tarun Deep

“…ABSTRACT Two new statistics, namely Δand Δχ, based on the extreme value theory, were derived by Gupta et al. We use these statistics to study the direction…”
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Effect of dark matter halo on global spiral modes in galaxies by Ghosh, Soumavo, Saini, Tarun Deep, Jog, Chanda J.

“…Low surface brightness (LSB) galaxies form a major class of galaxies, and are characterized by low disc surface density and low star formation rate. These are…”
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Effect of dark matter halo on global spiral modes in a collisionless galactic disk by Ghosh, Soumavo, Saini, Tarun Deep, Jog, Chanda J.

“…•Dominant dark matter halos shown to prevent spiral features in LSBs.•Stellar disks are modeled as realistic collisionless system.•UGC 7321, a LSB galaxy,…”
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Non-Gaussianity and direction-dependent systematics in HST Key Project data: Non-Gaussianity in HST data by Gupta, Shashikant, Saini, Tarun Deep

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Unstable m= 1 modes of counter-rotating Keplerian discs: Unstable modes of counter-rotating discs by Gulati, Mamta, Saini, Tarun Deep, Sridhar, S.

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Unstable m= 1 modes of counter-rotating Keplerian discs by Gulati, Mamta, Saini, Tarun Deep, Sridhar, S.

“…We study the linear m= 1 counter-rotating instability in a two-component, nearly Keplerian disc. Our goal is to understand these slow modes in discs orbiting…”
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