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Browsing by Subject "Planetary systems"

Browsing by Subject "Planetary systems"

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  • Age aspects of habitability 
    Safonova, M; Murthy, J; Shchekinov, Yu. A (Cambridge University Press, 2016-04)
    A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host ...
  • Discovery of a Low-mass Companion to a Metal-rich F Star with the MARVELS Pilot Project 
    Fleming, S. W; Ge, J; Mahadevan, S; Lee, B; Eastman, J. D; Siverd, R. J; Gaudi, B. S; Niedzielski, A; Sivarani, T; Stassun, K. G; Wolszczan, A; Barnes, R; Gary, B; Nguyen, Duy Cuong; Morehead, R. C; Wan, X; Zhao, B; Liu, J; Guo, P; Kane, S. R; van Eyken, J. C; Lee, N. M. D; Crepp, J. R; Shelden, A. C; Laws, C; Wisniewski, J. P; Schneider, D. P; Pepper, J; Snedden, S. A; Pan, K; Bizyaev, D; Brewington, H; Malanushenko, O; Malanushenko, V; Oravetz, D; Simmons, A; Watters, S (IOP Publishing, 2010-08-01)
    We report the discovery of a low-mass companion orbiting the metal-rich, main sequence F star TYC 2949-00557-1 during the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) pilot project. The host star ...
  • Evolution of emission line activity in intermediate mass young stars 
    Manoj, P; Bhatt, H. C; Maheswar, G; Muneer, S (American Astronomical Society, 2006-12-10)
    We present optical spectra of 45 intermediate-mass Herbig Ae/Be stars. Together with the multiepoch spectroscopic and photometric data compiled for a large sample of these stars and ages estimated for individual stars by ...
  • Homogeneous photospheric parameters and C abundances in G and K nearby stars with and without planets 
    da Silva, R; Milone, A. C; Reddy, B. E (EDP Sciences, 2011-02)
    Aims. We present a determination of photospheric parameters and carbon abundances for a sample of 172 G and K dwarf, subgiant, and giant stars with and without detected planets in the solar neighbourhood. The analysis was ...
  • Polarization of Starlight by Unresolved and Oblate Extra-solar Planet in Elliptical Orbit 
    Sengupta, S; Maiti, M (University of Chicago Press, 2006-03)
    We calculate the degree of linear polarization of radiation from stars having planets that may not be resolved spatially. We assume single scattering by water and silicate particulates in the planetary atmosphere. The ...
  • Precise photometric transit follow-up observations of five close-in exoplanets: update on their physical properties 
    Aritra Chakrabarty; Sengupta, S (IOP Publishing, 2019-07)
    We report the results of the high-precision photometric follow-up observations of five transiting hot Jupiters, WASP-33b, WASP-50b, WASP-12b, HATS-18b, and HAT-P-36b. The observations are made from the 2 m Himalayan Chandra ...
  • The Search for another earth 
    Sengupta, S (Indian Academy of Sciences, 2016-07)
    Is there life anywhere else in the vast cosmos?Are there planets similar to the Earth? For centuries,these questions baffled curious minds. Eithera positive or negative answer, if found oneday, would carry a deep philosophical ...
  • An upper limit on the ratio between the extreme ultraviolet and the bolometric luminosities of stars hosting habitable planets 
    Sengupta, S (Indian Academy of Sciences, 2016-07)
    An abundance analysis is reported of 58-K giants identified by Famaey et al. ( 2005 , A&A, 430, 165) as highly probable members of the Hercules stream selected from stars north of the celestial equator in the Hippar ...

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