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The evolution of substellar companions of intermediate mass stars

Subject Area Astrophysics and Astronomy
Term from 2011 to 2016
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 203253810
 
Final Report Year 2016

Final Report Abstract

In order to search for planets to A-type stars we searched the CoRoT data base for candidates, classified multi-object spectroscopy, from which a candidatie sample was isolated. Follow-up spectroscopy was carried out at several observatories to derive radial velocity curves and high-fidelity spectra for quantitative NLTE spectral analysis. A Jupiter-like planet was discovered for two candidates, the host stars, however, turned out to be early to mid-F stars. Six candidate exo­planets to A-type remain to be confirmed by complementing the observed data set. This number match exactly our expectation, if the frequency of such planets is the same as for G-type stars.

Publications

  • ”Multiobject spectroscopy of stars in the CoRoT fields. I. Early-type stars in the CoRoT-fields IRa01, LRa01, LRa02”, A&A, 541, 34
    Sebastian, D., Guenther, E. W., Schaffenroth, V., Gandolfi, D., Geier, S., Heber, U., Deleuil, M. and Moutou, C.
    (See online at https://dx.doi.org/10.1051/0004-6361/201118032)
  • 2012, ”Multi-object spectroscopy of stars in the CoRoT fields. II. The stellar population of the CoRoT fields IRa01, LRa01, LRa02, and LRa06”, A&A, 543, 125
    Guenther, E. W., Gandolfi, D., Sebastian, D., Deleuil, M., Moutou, C., and Cusano, R
    (See online at https://dx.doi.org/10.1051/0004-6361/201219121)
  • 2015 ”A planet in a polar orbit of 1.4 solar-mass star”, European Physical Journal Web of Conferences, 101, 02001
    Guenther, E. W., Cusano, F., Deeg, H., Gandolfi, D., Geier, S., Grziwa, S., Heber, U., Tal-Or, L., Sebastian, D. and Rodler, F.
    (See online at https://dx.doi.org/10.1051/epjconf/201510102001)
  • 2015, ’Transiting Sub-stellar companions of Intermediate-mass stars”, European Physical Journal Web of Conferences, 101, 06056
    Sebastian, D., Guenther, E. W., Heber, U., Geier, S., and Grziwa, S.
    (See online at https://dx.doi.org/10.1051/epjconf/201510106056)
  • 2015, ”The Effects of Close-in Exoplanets on Their Host Stars”, in Characterizing Stellar and Exoplanetary Environments, Astrophysics and Space Science Library, 411, 169
    Guenther, E. W. and Geier, S.
    (See online at https://doi.org/10.1007/978-3-319-09749-7_9)
  • ”Mass of WASP-33b”, 2015, A&A, 578,L4
    Lehmann, H., Guenther, E., Sebastian, D., Bollinger, M., Hartmann, M., Mkrtichian, D. E.
    (See online at https://dx.doi.org/10.1051/0004-6361/201526176)
  • 2016, ”III.7 Planets orbiting stars more massive than the Sun”, in The CoRoT Legacy Book: The Adventure of the Ultra High Precision Photometry from Space, 149
    Guenther, E. W., Sebastian, D., Gandolfi, D., Montanés-Rodríguez, P., Geier, S., Csizmadia, S., Cusano, F., Deeg, H. J., Fridlund, M., Grziwas, S., Heber, U., Heuser, C., Rodler, F. Tal-Or, L. and CoRoT Team
    (See online at https://dx.doi.org/10.1051/9782759818761.c037)
 
 

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