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In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B

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In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B. / Delorme, P.; Schmidt, T.; Bonnefoy, M.; Desidera, S.; Ginski, C.; Charnay, B.; Lazzoni, C.; Christiaens, V.; Messina, S.; D'Orazi, V.; Milli, J.; Schlieder, Joshua E.; Gratton, R.G.; Rodet, L.; Lagrange, A-M; Absil, O.; Vigan, A.; Galicher, R.; Hagelberg, J.; Bonavita, Mariangela; Lavie, B.; Zurlo, A; Olofsson, J.; Boccaletti, A.; Cantalloube, F.; Mouillet, D.; Chauvin, G.; Hambsch, F. -J.; Langlois, M.; Udry, S.; Henning, Th; Beuzit, J-L; Mordasini, Christoph; Lucas, P.; Marocco, F.; Biller, B.; Carson, J.; Cheetham, A.; Covino, E.; Caprio, V. De; Delboulbe, A.; Feld, M.; Girard, J.H.V.; Hubin, N.; Maire, A-L; Pavlov, A.; Petit, C.; Rouan, D.; Roelfsema, R.; Wildi, F.

In: Astronomy and Astrophysics, Vol. 608, A79, 08.12.2017, p. 1-25.

Research output: Contribution to journalArticlepeer-review

Harvard

Delorme, P, Schmidt, T, Bonnefoy, M, Desidera, S, Ginski, C, Charnay, B, Lazzoni, C, Christiaens, V, Messina, S, D'Orazi, V, Milli, J, Schlieder, JE, Gratton, RG, Rodet, L, Lagrange, A-M, Absil, O, Vigan, A, Galicher, R, Hagelberg, J, Bonavita, M, Lavie, B, Zurlo, A, Olofsson, J, Boccaletti, A, Cantalloube, F, Mouillet, D, Chauvin, G, Hambsch, F-J, Langlois, M, Udry, S, Henning, T, Beuzit, J-L, Mordasini, C, Lucas, P, Marocco, F, Biller, B, Carson, J, Cheetham, A, Covino, E, Caprio, VD, Delboulbe, A, Feld, M, Girard, JHV, Hubin, N, Maire, A-L, Pavlov, A, Petit, C, Rouan, D, Roelfsema, R & Wildi, F 2017, 'In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B', Astronomy and Astrophysics, vol. 608, A79, pp. 1-25. https://doi.org/10.1051/0004-6361/201731145

APA

Delorme, P., Schmidt, T., Bonnefoy, M., Desidera, S., Ginski, C., Charnay, B., Lazzoni, C., Christiaens, V., Messina, S., D'Orazi, V., Milli, J., Schlieder, J. E., Gratton, R. G., Rodet, L., Lagrange, A-M., Absil, O., Vigan, A., Galicher, R., Hagelberg, J., ... Wildi, F. (2017). In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B. Astronomy and Astrophysics, 608, 1-25. [A79]. https://doi.org/10.1051/0004-6361/201731145

Vancouver

Author

Delorme, P. ; Schmidt, T. ; Bonnefoy, M. ; Desidera, S. ; Ginski, C. ; Charnay, B. ; Lazzoni, C. ; Christiaens, V. ; Messina, S. ; D'Orazi, V. ; Milli, J. ; Schlieder, Joshua E. ; Gratton, R.G. ; Rodet, L. ; Lagrange, A-M ; Absil, O. ; Vigan, A. ; Galicher, R. ; Hagelberg, J. ; Bonavita, Mariangela ; Lavie, B. ; Zurlo, A ; Olofsson, J. ; Boccaletti, A. ; Cantalloube, F. ; Mouillet, D. ; Chauvin, G. ; Hambsch, F. -J. ; Langlois, M. ; Udry, S. ; Henning, Th ; Beuzit, J-L ; Mordasini, Christoph ; Lucas, P. ; Marocco, F. ; Biller, B. ; Carson, J. ; Cheetham, A. ; Covino, E. ; Caprio, V. De ; Delboulbe, A. ; Feld, M. ; Girard, J.H.V. ; Hubin, N. ; Maire, A-L ; Pavlov, A. ; Petit, C. ; Rouan, D. ; Roelfsema, R. ; Wildi, F. / In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B. In: Astronomy and Astrophysics. 2017 ; Vol. 608. pp. 1-25.

Bibtex

@article{162dec1d192a41d9a215d67b15e02475,
title = "In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B",
abstract = "The substellar companion HD206893b has recently been discovered by direct imaging of its disc-bearing host star with the SPHERE instrument. We investigate the atypical properties of the companion, which has the reddest near-infrared colours among all known substellar objects, either orbiting a star or isolated, and we provide a comprehensive characterisation of the host star-disc-companion system. We conducted a follow-up of the companion with adaptive optics imaging and spectro-imaging with SPHERE, and a multiinstrument follow-up of its host star. We obtain a R=30 spectrum from 0.95 to 1.64 micron of the companion and additional photometry at 2.11 and 2.25 micron. We carried out extensive atmosphere model fitting for the companions and the host star in order to derive their age, mass, and metallicity. We found no additional companion in the system in spite of exquisite observing conditions resulting in sensitivity to 6MJup (2MJup) at 0.5{"} for an age of 300 Myr (50 Myr). We detect orbital motion over more than one year and characterise the possible Keplerian orbits. We constrain the age of the system to a minimum of 50 Myr and a maximum of 700 Myr, and determine that the host-star metallicity is nearly solar. The comparison of the companion spectrum and photometry to model atmospheres indicates that the companion is an extremely dusty late L dwarf, with an intermediate gravity (log g 4.5-5.0) which is compatible with the independent age estimate of the system. Though our best fit corresponds to a brown dwarf of 15-30 MJup aged 100-300 Myr, our analysis is also compatible with a range of masses and ages going from a 50 Myr 12MJup planetary-mass object to a 50 MJup Hyades-age brown dwarf...",
keywords = "astro-ph.SR",
author = "P. Delorme and T. Schmidt and M. Bonnefoy and S. Desidera and C. Ginski and B. Charnay and C. Lazzoni and V. Christiaens and S. Messina and V. D'Orazi and J. Milli and Schlieder, {Joshua E.} and R.G. Gratton and L. Rodet and A-M Lagrange and O. Absil and A. Vigan and R. Galicher and J. Hagelberg and Mariangela Bonavita and B. Lavie and A Zurlo and J. Olofsson and A. Boccaletti and F. Cantalloube and D. Mouillet and G. Chauvin and Hambsch, {F. -J.} and M. Langlois and S. Udry and Th Henning and J-L Beuzit and Christoph Mordasini and P. Lucas and F. Marocco and B. Biller and J. Carson and A. Cheetham and E. Covino and Caprio, {V. De} and A. Delboulbe and M. Feld and J.H.V. Girard and N. Hubin and A-L Maire and A. Pavlov and C. Petit and D. Rouan and R. Roelfsema and F. Wildi",
note = "Accepted for publication in Astronomy & Astrophysics. Reproduced with permission from Astronomy & Astrophysics. {\textcopyright} 2018 ESO.",
year = "2017",
month = dec,
day = "8",
doi = "10.1051/0004-6361/201731145",
language = "English",
volume = "608",
pages = "1--25",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B

AU - Delorme, P.

AU - Schmidt, T.

AU - Bonnefoy, M.

AU - Desidera, S.

AU - Ginski, C.

AU - Charnay, B.

AU - Lazzoni, C.

AU - Christiaens, V.

AU - Messina, S.

AU - D'Orazi, V.

AU - Milli, J.

AU - Schlieder, Joshua E.

AU - Gratton, R.G.

AU - Rodet, L.

AU - Lagrange, A-M

AU - Absil, O.

AU - Vigan, A.

AU - Galicher, R.

AU - Hagelberg, J.

AU - Bonavita, Mariangela

AU - Lavie, B.

AU - Zurlo, A

AU - Olofsson, J.

AU - Boccaletti, A.

AU - Cantalloube, F.

AU - Mouillet, D.

AU - Chauvin, G.

AU - Hambsch, F. -J.

AU - Langlois, M.

AU - Udry, S.

AU - Henning, Th

AU - Beuzit, J-L

AU - Mordasini, Christoph

AU - Lucas, P.

AU - Marocco, F.

AU - Biller, B.

AU - Carson, J.

AU - Cheetham, A.

AU - Covino, E.

AU - Caprio, V. De

AU - Delboulbe, A.

AU - Feld, M.

AU - Girard, J.H.V.

AU - Hubin, N.

AU - Maire, A-L

AU - Pavlov, A.

AU - Petit, C.

AU - Rouan, D.

AU - Roelfsema, R.

AU - Wildi, F.

N1 - Accepted for publication in Astronomy & Astrophysics. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO.

PY - 2017/12/8

Y1 - 2017/12/8

N2 - The substellar companion HD206893b has recently been discovered by direct imaging of its disc-bearing host star with the SPHERE instrument. We investigate the atypical properties of the companion, which has the reddest near-infrared colours among all known substellar objects, either orbiting a star or isolated, and we provide a comprehensive characterisation of the host star-disc-companion system. We conducted a follow-up of the companion with adaptive optics imaging and spectro-imaging with SPHERE, and a multiinstrument follow-up of its host star. We obtain a R=30 spectrum from 0.95 to 1.64 micron of the companion and additional photometry at 2.11 and 2.25 micron. We carried out extensive atmosphere model fitting for the companions and the host star in order to derive their age, mass, and metallicity. We found no additional companion in the system in spite of exquisite observing conditions resulting in sensitivity to 6MJup (2MJup) at 0.5" for an age of 300 Myr (50 Myr). We detect orbital motion over more than one year and characterise the possible Keplerian orbits. We constrain the age of the system to a minimum of 50 Myr and a maximum of 700 Myr, and determine that the host-star metallicity is nearly solar. The comparison of the companion spectrum and photometry to model atmospheres indicates that the companion is an extremely dusty late L dwarf, with an intermediate gravity (log g 4.5-5.0) which is compatible with the independent age estimate of the system. Though our best fit corresponds to a brown dwarf of 15-30 MJup aged 100-300 Myr, our analysis is also compatible with a range of masses and ages going from a 50 Myr 12MJup planetary-mass object to a 50 MJup Hyades-age brown dwarf...

AB - The substellar companion HD206893b has recently been discovered by direct imaging of its disc-bearing host star with the SPHERE instrument. We investigate the atypical properties of the companion, which has the reddest near-infrared colours among all known substellar objects, either orbiting a star or isolated, and we provide a comprehensive characterisation of the host star-disc-companion system. We conducted a follow-up of the companion with adaptive optics imaging and spectro-imaging with SPHERE, and a multiinstrument follow-up of its host star. We obtain a R=30 spectrum from 0.95 to 1.64 micron of the companion and additional photometry at 2.11 and 2.25 micron. We carried out extensive atmosphere model fitting for the companions and the host star in order to derive their age, mass, and metallicity. We found no additional companion in the system in spite of exquisite observing conditions resulting in sensitivity to 6MJup (2MJup) at 0.5" for an age of 300 Myr (50 Myr). We detect orbital motion over more than one year and characterise the possible Keplerian orbits. We constrain the age of the system to a minimum of 50 Myr and a maximum of 700 Myr, and determine that the host-star metallicity is nearly solar. The comparison of the companion spectrum and photometry to model atmospheres indicates that the companion is an extremely dusty late L dwarf, with an intermediate gravity (log g 4.5-5.0) which is compatible with the independent age estimate of the system. Though our best fit corresponds to a brown dwarf of 15-30 MJup aged 100-300 Myr, our analysis is also compatible with a range of masses and ages going from a 50 Myr 12MJup planetary-mass object to a 50 MJup Hyades-age brown dwarf...

KW - astro-ph.SR

U2 - 10.1051/0004-6361/201731145

DO - 10.1051/0004-6361/201731145

M3 - Article

VL - 608

SP - 1

EP - 25

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A79

ER -