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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Constraints on structure formation models from the Sunyaev-Zel'dovich effect 
    Majumdar, S; Subrahmanyan, R (Royal Astronomical Society, 2000-03)
    In the context of cold dark matter (CDM) cosmological models, we have simulated images of the brightness temperature fluctuations in the cosmic microwave background (CMB) sky owing to the Sunyaev–Zel'dovich (S–Z) effect ...
  • Constraints on the epoch of dark matter formation from Milky Way satellites 
    Das, Subinoy; Nadler, E. O (The American Physical Society, 2021-02-15)
    A small fraction of thermalized dark radiation that transitions into cold dark matter (CDM) between big bang nucleosynthesis and matter-radiation equality can account for the entire dark matter relic density. Because of ...
  • Constraints on the evolution of the Triton atmosphere from occultations: 1989–2022 
    Sicardy, B; Tej, A; Gomes-Júnior, A. R; Romanov, F. D; Bertrand, T; Ashok, N. M; Lellouch, E; Morgado, B. E; Assafin, M; Desmars, J; Camargo, J. I. B; Kilic, Y; Ortiz, J. L; Vieira-Martins, R; Braga-Ribas, F; Ninan, J. P; Bhatt, B. C; Pramod Kumar, S; Swain, V; Sharma, S; Saha, A; Ojha, D. K; Pawar, G; Deshmukh, S; Deshpande, A; Ganesh, S; Jain, J. K; Mathew, S. K; Kumar, H; Bhalerao, V; Anupama, G. C; Barway, Sudhanshu; Brandeker, A; Floren, H. G; Olofsson, G; Bruno, G; Mao, Y. M; Ye, R. H; Zou, Q. Y; Sun, Y. K; Shen, Y. Y; Zhao, J. Y; Grishin, D. N; Romanova, L. V; Marchis, F; Fukui, K; Kukita, R; Benedetti-Rossi, G; Santos-Sanz, P; Dhyani, N; Gokhale, A; Kate, A (EDP Sciences, 2024-02)
    Context. In about 2000, the south pole of Triton experienced an extreme summer solstice that occurs every ∼650 years, when the subsolar latitude reached about 50°S. Bracketing this epoch, a few occultations probed the ...
  • Constraints on the neutrino magnetic moment from stellar evolution and supernovae type Ia 
    Sivaram, C (University of Calgary, 1993)
    There are several interesting consequences of a neutrino magnetic moment(NMM) such as possibility of a time varying solar neutrino signal (ENS), increased cooling of red giants and enhanced evolution of horizontal branch ...
  • Construction of a 57m hypertelescope in the southern Alps 
    Labeyrie, A; Allouche, F; Mourard, D; Bolgar, F; Chakraborthy, R; Maillot, J; Palitzyne, N; Poletti, J. R; Rochaix, J. P; Prud homme, R; Rondi, A; Roussel, M; Arun Surya (SPIE--The International Society for Optical Engineering, 2012-09)
    For information-rich direct images at high resolution, hypertelescopes combine light from a sparse array of many subapertures, using pupil densi cation. Among the possible architectures, the Arecibo-like spherical class has ...
  • The contagion of star-formation: its origin 
    Anathpindika, S (Astronomical Society of India, 2012)
    Dense pockets of cold, molecular gas preclude the formation of stars. During their infancy and later phases of evolution, stars inject considerable energy into the interstellar medium by driving shocks either due to ionising ...
  • Contamination control of UVIT 
    Kathiravan, S; Tandon, S. N; Prasad, B. R; Sriram, S; Pradeep, A; Vishnu, T; Mahesh, P. K; Kamath, P. U; Nagabhushana, S; Amit Kumar (Indian Academy of Sciences, 2021-10)
    Ultra Violet Imaging Telescope (UVIT) is one of the 5 instruments on AstroSat satellite, which was launched on September 28, 2015. UVIT was designed to make images with a resolution of <1.8′′, simultaneously in two ultraviolet ...
  • Contemporary deformation in the Kashmir–Himachal, Garhwal and Kumaon Himalaya: significant insights from 1995–2008 GPS time series 
    Jade, S; Mukul, M; Gaur, V. K; Kumar, K; Shrungeshwar, T. S; Satyal, G. S; Dumka, R. K; Jagannathan, S; Ananda, M. B; Dileep Kumar, P; Banerjee, S (Springer, 2014-06)
    We present new insights on the time-averaged surface velocities, convergence and extension rates along arc-normal transects in Kumaon, Garhwal and Kashmir–Himachal regions in the Indian Himalaya from 13 years of high-precision ...
  • Continuum radiation due to collective plasma process in quasars 
    Gangadhara, R. T; Krishan, V (Indian Association for the Cultivation of Science, 1992)
  • Contribution of Field Strength Gradients to the Net Vertical Current of Active Regions 
    Vemareddy, P (IOP Publishing, 2017-12)
    We examined the contribution of fi eld strength gradients for the degree of net vertical current ( NVC ) neutralization in active regions ( ARs ) . We used photospheric vector magnetic fi eld observations of ...
  • Contribution of HdC Stars to the Galactic Enrichment: The Sr-rich HdC Star HE 1015-2050 
    Goswami, A; Aoki, W (Astronomical Society of the Pacific, 2012-08)
    A fraction of the rare class of Hydrogen-deficient carbon (HdC) stars in our Galaxy are known to exhibit strong features of light neutron-capture elements such as Sr, Y and Zr usually attributed to the weak component of ...
  • The contribution of light bending and redshift to the pulse characteristics of a pulsar in the case of smaller neutron stars 
    Kapoor, R. C (The American Astronomical Society, 1991-09)
    The effect of light bending and redshift on pulsar beam characteristics is estimated using the weak form of the Kerr metric applicable to a slow-rotating neutron star. The beam is found to diverge by a factor of 2 or less ...
  • Contribution of polarons and bipolarons to low-temperature conductivity in doped polypyrrole 
    Reghu, M; Subramanyam, S. V; Chatterjee, S (American Physical Society, 1991-02)
    The resistivity of polypyrrole films, from 300 to 1.3 K, doped with ClO4 ions at various concentrations to have a different number of polarons and bipolarons, can be better fitted by T-1/3 than T-1/4. The conduction process ...
  • Contribution of Proton Capture Reactions to the Ascertained Abundance of Fluorine in the Evolved Stars of Globular Cluster M4, M22, 47 Tuc and NGC 6397 
    Mahanta, Upakul; Goswami, A; Duorah, H. L; Duorah, K (Indian Academy of Sciences, 2017-12)
    The origin of the abundance pattern and also the (anti)correlation present among the elements found in stars of globular clusters (GCs) remains unimproved until date. The proton-capture reactions are presently recognised ...
  • Contribution of relativistic quantum chemistry to electrons electric dipole moment for CP violation 
    Abe, M; Gopakumar, G; Das, B. P; Tatewaki, H; Mukherjee, D; Hada, M (AIP Publishing, 2015-05)
    The search for the electric dipole moment of the electron (eEDM) is important because it is a probe of Charge Conjugation-Parity (CP) violation. It can also shed light on new physics beyond the standard model. It is not ...
  • Convection and the Phenomenon of Kilogauss Magnetic Fields on the Sun 
    Venkatakrishnan, P (Indian Institute of Astrophysics, Bangalore, 1984)
    The role played by convection in the formation of slender magnetic flux tubes and in the dynamics of the gas within the tube is discussed in the case of simplified models. Convection instability cannot drive systematic ...
  • Convective collapse and overstable oscillations in solar flux tubes 
    Hasan, S. S (European Space Egency, 1984-11)
    The collapse of solar flux tubes by a convective instability is investigated. At the initial epoch it is assumed that the flux tube is in hydrostatic equilibrium and that it has the same temperature as the ambient medium. ...
  • Convective Intensification of Magnetic Flux Tubes in Stellar Photospheres 
    Rajaguru, S. P; Kurucz, R. L; Hasan, S. S (The American Astronomical Society, 2002-02)
    The convective collapse of thin magnetic flux tubes in the photospheres of Sun-like stars is investigated using realistic models of the superadiabatic upper convection zone layers of these stars. The strengths of convectively ...
  • Conversion of Neutron Stars to Strange Stars as the Central Engine of Gamma-Ray Bursts 
    Bombaci, I; Datta, B (The American Astronomical Society, 2000-02)
    We study the conversion of a neutron star to a strange star as a possible energy source for gamma-ray bursts. We use different recent models for the equation of state of neutron star matter and strange quark matter. We ...
  • Cool star flux spectra for population studies in galaxies 
    Malagnini, M. L; Morossi, C; Buser, R; Parthasarathy, M (EDP Sciences, 1992-08)
    Five solar-composition cool giant stars have been observed with the IUE low resolution mode. The UV energy distributions were merged with visual spectrophotometry from the literature and compared with predictions from two ...

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