Architecture of Selected Planetary Systems: III. Direct Imaging Search for Outer Planets

• Applicant: Professor Dr. Ralph Neuhäuser
• Subject Area: Astrophysics and Astronomy
• Term: from 2010 to 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 168925145

• Final Report Year: 2016

Final Report Abstract

We have studied several sub-stellar companions around stars with debris disks in great detail: imaging photometry, astrometry, and spectroscopy. Given their mass constrains, they can be either planets or brown dwarfs. We could confirm their common proper motion connection to their host stars with larger significance. - We could show orbital motion for the first time (by curvature in the orbit). - We could constrain several orbital parameters. - We could constrain their masses better than before. - We have started to study the interaction of sub-stellar companions with outer debris disks. In the next years (maybe next decade), with a larger time epoch difference and even better telescopes and instruments (better astrometric precision), one will be able to constrain orbital parameters and the mass very precisely by a real orbital solution.

Publications

• 2010, ‘Direct detecti­ on of a substellar companion to the young nearby star PZ Telescopii’. Astronomy and Astrophysics 532, L1-4
  Mugrauer M., Vogt N., Neuhäuser R., Schmidt T.O.B.
  
• 2010, ‘Orbital motion of the young brown dwarf companion TWA 5 B’. Astronomy and Astrophysics 516, 112-116
  Neuhäuser R., Schmidt T.O.B., Hambaryan V.V., Vogt N.
  
• 2011, ‘Debris discs in systems with transiting planets’. Monthly Notices of the Royal Astronomical Society 418, L15-19
  Krivov A.V., Reidemeister M., Löhne T., Fiedler S., Neuhäuser R.
  
• 2011, ‘Further deep imaging of HR 7329 and its brown dwarf companion’. Monthly Notices of the Royal Astronomical Society 416, 1430-1435
  Neuhäuser R., Ginski C., Schmidt T.O.B., Mugrauer M.
  
• 2012, ‘Astrometric confirmation of young low-mass binari­ es and multiple systems in the Chamaeleon star-forming regions’. Astronomy and Astrophysics 546, 63-94
  Vogt N., Schmidt T.O.B., Neuhäuser R., Bedalov A., Roell T., Seifahrt A., Mugrauer M.
  (See online at https://doi.org/10.1051/0004-6361/201118410)
• 2012, ‘Extrasolar planets in stellar multiple systems’. Astronomy and Astrophysics 542, 92-81
  Roell T., Neuhäuser R., Seifahrt A., Mugrauer M.
  
• 2012, ‘New observations of the PZ Tel system, its browh dwarf companions and debris disc’. Monthly Notices of the Royal Astronomical Society 424,1714-1722
  Mugrauer M., Vogt, N., Neuhäuser R., Schmidt T.O.B., Ginski C., Roll T.
  
• 2013, ‘New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Ho 5 in the Cha I star-forming region’. Astronomy and Astrophysics 557, 80-92
  Schmidt T.O.B., Vogt, N., Neuhäuser R., Bedalov A., Roell T.
  
• 2013, ‘Orbital motion of the binary brown dwarf companions HD 130948 BC around their host star’. Monthly Notices of the Royal Astronomical Society 434, 671-683
  Ginski C., Neuhäuser R., Mugrauer M., Schmidt T.O.B., Adam C.
  (See online at https://doi.org/10.1093/mnras/stt1059)
• 2014, ‘A direct imaging search for close stellar and sub-stellar companions to young nearby stars’. Astronomische Nachrichten 336, 97-110
  Vogt N., Mugrauer M., Neuhäuser R., Schmidt T.O.B., Contreras-Quijada A.
  (See online at https://doi.org/10.1002/asna.201412134)
• 2014, ‘Astrometric follow-up observations of directly imaged substellar companions to young stars and brown dwarfs’. Monthly Notices of the Royal Astronomical Society 444, 2280-2302
  Ginski C., Schmidt T.O.B., Mugrauer M., Neuhäuser R., Vogt N., Errmann R., Berndt A.
  (See online at https://doi.org/10.1093/mnras/stu1586)
• 2014, ‘Astrometric monitoring and orbit constraint of the GSC08047-00232 system with VLT/NaCo’. Monthly Notices of the Royal Astronomical Society 438, 1102-1113
  Ginski C., Mugrauer M., Neuhäuser R., Schmidt T.O.B.
  (See online at https://doi.org/10.1093/mnras/stt2263)
• 2014, ‘First spectroscopic observations of the substellar companion of the young debris disk star PZ Telescopii’. Astronomy and Astrophysics 566, 85-91
  Schmidt T.O.B., Mugrauer M., Neuhäuser R., Vogt N., Witte S., Hauschildt P.H., Helling C., Seifahrt A.
  (See online at https://doi.org/10.1051/0004-6361/201321625)
• 2016, ‘A coronagraphic search for wide sub-stellar companions among members of the Ursa Major moving group’. Astronomy and Astrophysics
  Ammler-von Eiff M., Bedalov A., Kranhold C., Mugrauer M., Schmidt T.O.B., Neuhäuser R., Errmann R.,