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Browsing by Subject "Exoplanets"

Browsing by Subject "Exoplanets"

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  • CD-HPF: new habitability score via data analytic modeling 
    Bora, K; Saha, S; Agrawal, S; Safonova, M; Routh, S; Narasimhamurthy, A (Elsevier B.V, 2016-10)
    The search for life on the planets outside the Solar System can be broadly classified into the following: looking for Earth-like conditions or the planets similar to the Earth (Earth similarity), and looking for the ...
  • CEESA meets machine learning: a Constant Elasticity Earth Similarity Approach to habitability and classification of exoplanets 
    Basak, S; Saha, S; Mathur, S; Bora, K; Makhija, S; Safonova, M; Agarwal, S (Elsevier B.V, 2020-01)
    We examine the existing metrics of habitability and classification schemes of extrasolar planets and provide an exposition of the use of computational intelligence techniques to estimate habitability and to automate the ...
  • Critical Analysis of Tess Transit Photometric Data: Improved Physical Properties for Five Exoplanets 
    Saha, Suman; Sengupta, S (2021-11-01)
    We present improved physical parameters for four hot Jupiters: KELT-7 b, HAT-P-14 b, WASP-29 b, WASP-95 b, and a hot Neptune: WASP-156 b, by performing critical and rigorous analysis of the time-series observations from the ...
  • Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory 
    Skemer, Andrew J; Stelter, R. Deno; Sallum, Stephanie; MacDonald, Nicholas; Kupke, Renate; Ratliff, Christopher; Banyal, R. K; Hasan, Amirul; Varshney, Hari Mohan; Surya, Arun; Prakaesh, Ajin; Sivarani, T; Ramya, S; Govinda, K. V; Fitzgerald, Michael P; Wang, Eric; Kassis, Marc; Absil, Olivier; Alvarez, Carlos; Batalha, Natasha; Boucher, Marc-Andre; Bourgenot, Cyril; Brandt, Timothy; Briesemeister, Zackery; Kleer, Katherine de; Pater, Imke de; Deich, William; Divakar, Devika; Filion, Guillaume; Gauvin, Etienne; Gonzales, Michael; Greene, Thomas; Hinz, Philip; Jensen-Clem, Rebecca; Johnson, Christopher; Kain, Isabel; Kruglikov, Gabriel; Lach, Mackenzie; Landry, Jean-Thomas; Li, Jialin; Liu, Michael C; Lyke, James; Magnon, Kenneth; Marin, Eduardo; Martin, Emily; Martinez, Raquel; Mawet, Dimitri; Miles, Brittany; Sandford, Dale; Sheehan, Patrick; Sohn, Ji Man; Stone, Jordan (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the design of SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) a new 2-5 micron coronagraphic integral field spectrograph under construction for Keck Observatory. SCALES enables ...
  • The development of HISPEC for Keck and MODHIS for TMT: science cases and predicted sensitivities 
    Konopacky, Quinn M; Baker, Ashley D; Mawet, Dimitri; Fitzgerald, Michael P; Jovanovic, Nemanja; Beichman, Charles; Ruane, Garreth; Bertz, Rob; Terada, Hiroshi; Dekany, Richard; Lingvay, Larry; Kassis, Marc; Anderson, David; Tamura, Motohide; Benneke, Bjorn; Beatty, Thomas; Do, Tuan; Nishiyama, Shogo; Plavchan, Peter; Wang, Jason; Wang, Ji; Burgasser, Adam; Ruffio, Jean-Baptiste; Zhang, Huihao; Brown, Aaron; Fucik, Jason; Gibbs, Aidan; Gibson, Rose; Halverson, Sam; Johnson, Christopher; Karkar, Sonia; Kotani, Takayuki; Kress, Evan; Leifer, Stephanie; Magnone, Kenneth; Maire, Jerome; Pahuja, Rishi; Porter, Michael; Roberts, Mitsuko; Sappey, Ben; Thorne, Jim; Wang, Eric; Artigau, Etienne; Blake, Geoffrey A; Canalizo, Gabriela; Chen, Guo; Doppmann, Greg; Doyon, Rene; Dressing, Courtney; Fang, Min; Greene, Thomas; Herczeg, Greg; Hillenbrand, Lynne; Howard, Andrew; Kane, Stephen; Kataria, Tiffany; Kempton, Eliza; Knutson, Heather; Lafrenière, David; Liu, Chao; Metchev, Stanimir; Millar-Blanchaer, Max; Narita, Norio; Pandey, G; Rajaguru, S. P; Robertson, Paul; Salyk, Colette; Sato, Bun’ei; Schlawin, Evertt; Sengupta, S; Sivarani, T; Skidmore, Warren; Vasisht, Gautam; Yasui, Chikako; Zhang, Hui (SPIE-The International Society for Optical Engineering, 2023-10)
    HISPEC is a new, high-resolution near-infrared spectrograph being designed for the W.M. Keck II telescope. By offering single-shot, R 100,000 spectroscopy between 0.98 – 2.5 µm, HISPEC will enable spectroscopy of transiting ...
  • Disks around young stellar objects 
    Bhatt, H. C (Indian Academy of Science, 2011-07)
    By 1939, when Chandrasekhar’s classic monograph on the theory of Stellar Structure was published, although the need for recent star formation was fully acknowledged, no one had yet recognized an object that could be called ...
  • Exciting habitats 
    Sivaram, C (Deccan Herald, 2010-03-23)
  • Galactic Chemical Evolution of Exoplanet Hosting Stars: Are High-mass Planetary Systems Young? 
    Swastik, C; Banyal, R. K; Narang, Mayank; Manoj, P; Sivarani, T; Rajaguru, S. P; Athira Unni; Banerjee, Bihan (American Astronomical Society, 2022-08-01)
    The imprints of stellar nucleosynthesis and chemical evolution of the galaxy can be seen in different stellar populations, with older generation stars showing higher α-element abundances and the later generations ...
  • Generic models for disk-resolved and disk-integrated phase-dependent linear polarization of light reflected from exoplanets 
    Chakrabarty, Aritra; Sengupta, S (IOP Publishing, 2021-08-20)
    Similar to the case of solar system planets, reflected starlight from exoplanets is expected to be polarized due to atmospheric scattering, and the net disk-integrated polarization should be nonzero owing to the asymmetrical ...
  • Investigating Extra-solar Planetary System Qatar-1 through Transit Observations 
    Thakur, P; Mannaday, V. K; Jiang, I; Sahu, D. K; Chand, S (Societe Royale des Sciences de Liege, 2018-04)
    We report the results of the transit timing variation (TTV) analysis of the extra-solar planet Qatar1b using thirty eight light curves. Our analysis combines thirty five previously available transit light curves with three ...
  • Light years away from us 
    Sivaram, C (Deccan Herald, 2008-10-14)
  • Multiband transit follow-up observations of five hot Jupiters with critical noise treatments: improved physical properties 
    Saha, Suman; Chakrabarty, Aritra; Sengupta, S (IOP Publishing, 2021-07-01)
    The most challenging limitation in transit photometry arises from the noises in the photometric signal. In particular, the ground-based telescopes are heavily affected by the noise due to perturbation in the Earth’s ...
  • Polarization of Rotationally Oblate Self-luminous Exoplanets with Anisotropic Atmospheres 
    Chakrabarty, Aritra; Sengupta, S; Marley, Mark S (American Astronomical Society, 2022-03-01)
    The young self-luminous giant exoplanets are expected to be oblate in shape, owing to the high rotational speeds observed for some objects. Similar to the case of brown dwarfs, the thermal emission from these planets should ...
  • Predictions by Indian Astronomer Sujan Sengupta inspires NASA and Caltech exoplanet research 
    Venkateswaran, T. V. (Firstpost, 2017-06-02)
  • Probing Transit Timing Variation and Its Possible Origin with 12 New Transits of TrES-3b 
    Mannaday, V. K; Thakur, P; Jiang, I; Sahu, D. K; Joshi, Y. C; Pandey, A. K; Joshi, S; Yadav, R. K; Su, Li-Hsin; Sariya, D. P; Yeh, Li-Chin; Griv, Evgeny; Mkrtichian, D; Shlyapnikov, A; Moskvin, V; Ignatov, V; Vanko, M; Puskullu, C (IOP Publishing, 2020-07)
    We present 12 new transit light curves of the hot-Jupiter TrES-3b observed during 2012−2018 to probe the transit timing variation (TTV). By combining the midtransit times determined from these 12 transit data with ...
  • Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission 
    Narang, Mayank; Oza, Apurva V; Hakim, Kaustubh; Manoj, P; Banyal, R. K; Thorngren, Daniel P (American Astronomical Society, 2023-01-01)
    We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey. Due to stellar tidal heating, ...
  • Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data 
    Mannaday, Vineet Kumar; Thakur, Parijat; Southworth, John; Jiang, Ing-Guey; Sahu, D. K; Mancini, L; Vanko, M; Kundra, Emil; Gajdos, Pavol; A-thano, Napaporn; Sariya, Devesh P; Yeh, Li-Chin; Griv, Evgeny; Mkrtichian, David; Shlyapnikov, Aleksey (American Astronomical Society, 2022-11-01)
    We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b, observed by the Transiting Exoplanet Survey Satellite, plus two transit light curves of Qatar-1b, observed by us, using a ...
  • The search for another earth - Part II 
    Sengupta, S (Indian Academy of Sciences, 2016-10)
    In the first part, we discussed the various methods for thedetection of planets outside the solar system known as theexoplanets. In this part, we will describe various kinds ofexoplanets. The habitable planets discovered ...
  • A Search for Polarized Thermal Emission from Directly Imaged Exoplanets and Brown Dwarf Companions to Nearby Stars 
    Jensen-Clem, R; Millar-Blanchaer, M. A; van Holstein, R. G; Mawet, Dimitri; Graham, J; Sengupta, S; Marley, M. S; Snik, Frans; Vigan, A; Hinkley, S; de Boer, Jos; Girard, J. H; De Rosa, R. J; Bowler, B. P; Wiktorowicz, S. J; Perrin, M. D; Crepp, J. R; Macintosh, B (IOP Publishing, 2020-12)
    Aerosols in the atmospheres of cloudy gas giant exoplanets and brown dwarfs scatter and polarize these objects' thermal emission. If such an object has an oblate shape or nonuniform cloud distribution, the net degree of ...
  • The slicer combined with array of lenslets for exoplanet spectroscopy (SCALES): driving science cases and expected outcomes 
    Sallum, Steph; Skemer, Andrew; Stelter, Deno; Banyal, R. K; Batalha, Natalie; Batalha, Natasha; Blake, Geoff; Brandt, Tim; Briesemeister, Zack; Kleer, Katherine de; Pater, Imke de; Desai, Aditi; Eisner, Josh; Fong, Wen-fai; Greene, Tom; Honda, Mitsuhiko; Jensen-Clem, Rebecca; Kain, Isabel; Kilpatrick, Charlie; Kupke, Renate; Lach, Mackenzie; Liu, Michael C; Macintosh, Bruce; Martinez, Raquel A; Mawet, Dimitri; Miles, Brittany; Morley, Caroline; Powell, Diana; Sethuram, Ramya; Sheehan, Patrick; Spilker, Justin; Stone, Jordan; Surya, Arun; Sivarani, T; Unni, Athira; Wagner, Kevin; Zhou, Yifan (SPIE-The International Society for Optical Engineering, 2023-10)
    The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES) is a 2 − 5 µm, high-contrast integral field spectrograph (IFS) currently being built for Keck Observatory. With both low (R ≲ 250) and medium ...

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