Browsing by Author "Dalal, S."

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  • Detection and characterisation of 54 massive companions with the SOPHIE spectrograph Seven new brown dwarfs and constraints on the brown dwarf desert 

    Kiefer, F.; Hébrard, G.; Sahlmann, J.; Sousa, S. G.; Forveille, T.; Santos, N.; Mayor, M.; Deleuil, M.; Wilson, P. A.; Dalal, S.; Díaz, R. F.; Henry, G. W.; Hagelberg, J.; Hobson, M. J.; Demangeon, O.; Bourrier, V.; Delfosse, X.; Arnold, L.; Astudillo Defru, Nicola; Beuzit, J. L.; Boisse, I.; Bonfils, X.; Borgniet, S.; Bouchy, F.; Courcol, B.; Ehrenreich, D.; Hara, N.; Lagrange, A. M.; Lovis, C.; Montagnier, G.; Moutou, C.; Pepe, F.; Perrier, C.; Rey, J.; Santerne, A.; Ségransan, D.; Udry, S.; Vidal-Madjar, A. (2019-11-05)
    Brown dwarfs (BD) are substellar objects intermediate between planets and stars with masses of ∼13–80 MJ . While isolated BDs are most likely produced by gravitational collapse in molecular clouds down to masses of a few ...

  • The SOPHIE search for northern extrasolar planets XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain 

    Hara, N. C.; Bouchy, F.; Stalport, M.; Boisse, I.; Rodrigues, J.; Delisle, J.-B.; Santerne, A.; Henry, G. W.; Arnold, L.; Astudillo Defru, Nicola; Borgniet, S.; Bonfils, X.; Bourrier, V.; Brugger, B.; Courcol, B.; Dalal, S.; Deleuil, M.; Delfosse, X.; Demangeon, O.; Díaz, R. F.; Dumusque, X.; Forveille, T.; Hébrard, G.; Hobson, M. J.; Kiefer, F.; López, T.; Mignon, L.; Mousis, O.; Moutou, C.; Pepe, F.; Rey, J.; Santos, N. C.; Ségransan, D.; Udry, S.; Wilson, P. A. (2020-04)
    Aims. Since 2011, the SOPHIE spectrograph has been used to search for Neptunes and super-Earths in the northern hemisphere. As part of this observational program, 290 radial velocity measurements of the 6.4 V magnitude ...