Characterizing HR 3549 B using SPHERE

Dino Mesa; Arthur Vigan; V. D'Orazi; C. Ginski; Silvano Desidera; Mickael Bonnefoy; Ruth Gratton; M. Langlois; F. Marzari; Sergio Messina; J. Antichi; B. Biller; M. Bonavita; E. Cascone; Gael Chauvin; R. U. Claudi; I. Curtis; D. Fantinel; M. Feldt; A. Garufi; R. Galicher; Th Henning; S. Incorvaia; A. M. Lagrange; M. Millward; C. Perrot; B. Salasnich; S. Scuderi; E. Sissa; Z. Wahhaj; A Zurlo

doi:10.1051/0004-6361/201628740

Characterizing HR 3549 B using SPHERE

Dino Mesa, Arthur Vigan, V. D'Orazi, C. Ginski, Silvano Desidera, Mickael Bonnefoy, Ruth Gratton, M. Langlois, F. Marzari, Sergio Messina, J. Antichi, B. Biller, M. Bonavita, E. Cascone, Gael Chauvin, R. U. Claudi, I. Curtis, D. Fantinel, M. Feldt, A. GarufiR. Galicher, Th Henning, S. Incorvaia, A. M. Lagrange, M. Millward, C. Perrot, B. Salasnich, S. Scuderi, E. Sissa, Z. Wahhaj, A Zurlo

School of Physics and Astronomy

Research output: Contribution to journal › Article › Research › peer-review

25 Citations (Scopus)

Abstract

Aims. In this work, we characterize the low-mass companion of the A0 field star HR 3549.

Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ mode and IRDIS in the H band. We also acquired a medium-resolution spectrum with the IRDIS long-slit spectroscopy mode. The data were reduced using the dedicated SPHERE GTO pipeline, which is custom-designed for this instrument. We employed algorithms such as PCA and TLOCI to reduce the speckle noise.

Results. The companion was clearly visible with both IRDIS and IFS. We obtained photometry in four different bands and also the astrometric position for the companion. Based on our astrometry, we confirm that it is a bound object and set constraints on its orbit. Although several uncertainties still remain, we estimate an age of ∼100-150 Myr for this system, yielding a most probable mass for the companion of 40-50 M_Jup and T_eff ∼ 2300-2400 K. Compared with template spectra, this points to a spectral type between M9 and L0 for the companion, commensurate with its position on the color-magnitude diagram.

Original language	English
Article number	A119
Number of pages	12
Journal	Astronomy & Astrophysics
Volume	593
DOIs	https://doi.org/10.1051/0004-6361/201628740
Publication status	Published - 1 Sept 2016

Keywords

Instrumentation: spectrographs
Methods: data analysis
Planetary systems
Techniques: imaging spectroscopy

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Mesa, D., Vigan, A., D'Orazi, V., Ginski, C., Desidera, S., Bonnefoy, M., Gratton, R., Langlois, M., Marzari, F., Messina, S., Antichi, J., Biller, B., Bonavita, M., Cascone, E., Chauvin, G., Claudi, R. U., Curtis, I., Fantinel, D., Feldt, M., ... Zurlo, A. (2016). Characterizing HR 3549 B using SPHERE. Astronomy & Astrophysics, 593, Article A119. https://doi.org/10.1051/0004-6361/201628740

@article{46a882135a0f4c0ba6d099acbc143ea3,

title = "Characterizing HR 3549 B using SPHERE",

abstract = "Aims. In this work, we characterize the low-mass companion of the A0 field star HR 3549. Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ mode and IRDIS in the H band. We also acquired a medium-resolution spectrum with the IRDIS long-slit spectroscopy mode. The data were reduced using the dedicated SPHERE GTO pipeline, which is custom-designed for this instrument. We employed algorithms such as PCA and TLOCI to reduce the speckle noise. Results. The companion was clearly visible with both IRDIS and IFS. We obtained photometry in four different bands and also the astrometric position for the companion. Based on our astrometry, we confirm that it is a bound object and set constraints on its orbit. Although several uncertainties still remain, we estimate an age of ∼100-150 Myr for this system, yielding a most probable mass for the companion of 40-50 MJup and Teff ∼ 2300-2400 K. Compared with template spectra, this points to a spectral type between M9 and L0 for the companion, commensurate with its position on the color-magnitude diagram.",

keywords = "Instrumentation: spectrographs, Methods: data analysis, Planetary systems, Techniques: imaging spectroscopy",

author = "Dino Mesa and Arthur Vigan and V. D'Orazi and C. Ginski and Silvano Desidera and Mickael Bonnefoy and Ruth Gratton and M. Langlois and F. Marzari and Sergio Messina and J. Antichi and B. Biller and M. Bonavita and E. Cascone and Gael Chauvin and Claudi, {R. U.} and I. Curtis and D. Fantinel and M. Feldt and A. Garufi and R. Galicher and Th Henning and S. Incorvaia and Lagrange, {A. M.} and M. Millward and C. Perrot and B. Salasnich and S. Scuderi and E. Sissa and Z. Wahhaj and A Zurlo",

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month = sep,

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doi = "10.1051/0004-6361/201628740",

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Mesa, D, Vigan, A, D'Orazi, V, Ginski, C, Desidera, S, Bonnefoy, M, Gratton, R, Langlois, M, Marzari, F, Messina, S, Antichi, J, Biller, B, Bonavita, M, Cascone, E, Chauvin, G, Claudi, RU, Curtis, I, Fantinel, D, Feldt, M, Garufi, A, Galicher, R, Henning, T, Incorvaia, S, Lagrange, AM, Millward, M, Perrot, C, Salasnich, B, Scuderi, S, Sissa, E, Wahhaj, Z & Zurlo, A 2016, 'Characterizing HR 3549 B using SPHERE', Astronomy & Astrophysics, vol. 593, A119. https://doi.org/10.1051/0004-6361/201628740

TY - JOUR

T1 - Characterizing HR 3549 B using SPHERE

AU - Mesa, Dino

AU - Vigan, Arthur

AU - D'Orazi, V.

AU - Ginski, C.

AU - Desidera, Silvano

AU - Bonnefoy, Mickael

AU - Gratton, Ruth

AU - Langlois, M.

AU - Marzari, F.

AU - Messina, Sergio

AU - Antichi, J.

AU - Biller, B.

AU - Bonavita, M.

AU - Cascone, E.

AU - Chauvin, Gael

AU - Claudi, R. U.

AU - Curtis, I.

AU - Fantinel, D.

AU - Feldt, M.

AU - Garufi, A.

AU - Galicher, R.

AU - Henning, Th

AU - Incorvaia, S.

AU - Lagrange, A. M.

AU - Millward, M.

AU - Perrot, C.

AU - Salasnich, B.

AU - Scuderi, S.

AU - Sissa, E.

AU - Wahhaj, Z.

AU - Zurlo, A

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Aims. In this work, we characterize the low-mass companion of the A0 field star HR 3549. Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ mode and IRDIS in the H band. We also acquired a medium-resolution spectrum with the IRDIS long-slit spectroscopy mode. The data were reduced using the dedicated SPHERE GTO pipeline, which is custom-designed for this instrument. We employed algorithms such as PCA and TLOCI to reduce the speckle noise. Results. The companion was clearly visible with both IRDIS and IFS. We obtained photometry in four different bands and also the astrometric position for the companion. Based on our astrometry, we confirm that it is a bound object and set constraints on its orbit. Although several uncertainties still remain, we estimate an age of ∼100-150 Myr for this system, yielding a most probable mass for the companion of 40-50 MJup and Teff ∼ 2300-2400 K. Compared with template spectra, this points to a spectral type between M9 and L0 for the companion, commensurate with its position on the color-magnitude diagram.

AB - Aims. In this work, we characterize the low-mass companion of the A0 field star HR 3549. Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ mode and IRDIS in the H band. We also acquired a medium-resolution spectrum with the IRDIS long-slit spectroscopy mode. The data were reduced using the dedicated SPHERE GTO pipeline, which is custom-designed for this instrument. We employed algorithms such as PCA and TLOCI to reduce the speckle noise. Results. The companion was clearly visible with both IRDIS and IFS. We obtained photometry in four different bands and also the astrometric position for the companion. Based on our astrometry, we confirm that it is a bound object and set constraints on its orbit. Although several uncertainties still remain, we estimate an age of ∼100-150 Myr for this system, yielding a most probable mass for the companion of 40-50 MJup and Teff ∼ 2300-2400 K. Compared with template spectra, this points to a spectral type between M9 and L0 for the companion, commensurate with its position on the color-magnitude diagram.

KW - Instrumentation: spectrographs

KW - Methods: data analysis

KW - Planetary systems

KW - Techniques: imaging spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=84990206091&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201628740

DO - 10.1051/0004-6361/201628740

M3 - Article

AN - SCOPUS:84990206091

SN - 0004-6361

VL - 593

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A119

ER -

Characterizing HR 3549 B using SPHERE

Abstract

Keywords

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