Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager

Mara Johnson-Groh; Christian Marois; Robert J. De Rosa; Eric L. Nielsen; Julien Rameau; Sarah Blunt; Jeffrey Vargas; S. Mark Ammons; Vanessa P. Bailey; Travis S. Barman; Joanna Bulger; Jeffrey K. Chilcote; Tara Cotten; René Doyon; Gaspard Duchêne; Michael P. Fitzgerald; Kate B. Follette; Stephen Goodsell; James R. Graham; Alexandra Z. Greenbaum; Pascale Hibon; Li Wei Hung; Patrick Ingraham; Paul Kalas; Quinn M. Konopacky; James E. Larkin; Bruce Macintosh; Jérôme Maire; Franck Marchis; Mark S. Marley; Stanimir Metchev; Maxwell A. Millar-Blanchaer; Rebecca Oppenheimer; David W. Palmer; Jennifer Patience; Marshall Perrin; Lisa A. Poyneer; Laurent Pueyo; Abhijith Rajan; Fredrik T. Rantakyrö; Dmitry Savransky; Adam C. Schneider; Anand Sivaramakrishnan; Inseok Song; Remi Soummer; Sandrine Thomas; David Vega; J. Kent Wallace; Jason J. Wang; Kimberly Ward-Duong; Sloane J. Wiktorowicz; Schuyler G. Wolff

doi:10.3847/1538-3881/aa6480

Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager

Mara Johnson-Groh, Christian Marois, Robert J. De Rosa, Eric L. Nielsen, Julien Rameau, Sarah Blunt, Jeffrey Vargas, S. Mark Ammons, Vanessa P. Bailey, Travis S. Barman, Joanna Bulger, Jeffrey K. Chilcote, Tara Cotten, René Doyon, Gaspard Duchêne, Michael P. Fitzgerald, Kate B. Follette, Stephen Goodsell, James R. Graham, Alexandra Z. GreenbaumPascale Hibon, Li Wei Hung, Patrick Ingraham, Paul Kalas, Quinn M. Konopacky, James E. Larkin, Bruce Macintosh, Jérôme Maire, Franck Marchis, Mark S. Marley, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David W. Palmer, Jennifer Patience, Marshall Perrin, Lisa A. Poyneer, Laurent Pueyo, Abhijith Rajan, Fredrik T. Rantakyrö, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Remi Soummer, Sandrine Thomas, David Vega, J. Kent Wallace, Jason J. Wang, Kimberly Ward-Duong, Sloane J. Wiktorowicz, Schuyler G. Wolff

Earth and Space Exploration, School of (SESE)

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

17 Scopus citations

Abstract

We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager (GPI) as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J (1.12-1.3 μm) and H (1.50-1.80 μm) bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au (70-year) orbit with a 68% confidence interval between 14 and 28 au, an eccentricity of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log(L_bol/L_⊙)=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M _Jup. These results are consistent with previous measurements of the object.

Original language	English (US)
Article number	190
Journal	Astronomical Journal
Volume	153
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/aa6480
State	Published - Apr 2017

Keywords

planetary systems
stars: individual (HD 984)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/aa6480

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Johnson-Groh, M., Marois, C., De Rosa, R. J., Nielsen, E. L., Rameau, J., Blunt, S., Vargas, J., Ammons, S. M., Bailey, V. P., Barman, T. S., Bulger, J., Chilcote, J. K., Cotten, T., Doyon, R., Duchêne, G., Fitzgerald, M. P., Follette, K. B., Goodsell, S., Graham, J. R., ... Wolff, S. G. (2017). Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager. Astronomical Journal, 153(4), Article 190. https://doi.org/10.3847/1538-3881/aa6480

Johnson-Groh, M, Marois, C, De Rosa, RJ, Nielsen, EL, Rameau, J, Blunt, S, Vargas, J, Ammons, SM, Bailey, VP, Barman, TS, Bulger, J, Chilcote, JK, Cotten, T, Doyon, R, Duchêne, G, Fitzgerald, MP, Follette, KB, Goodsell, S, Graham, JR, Greenbaum, AZ, Hibon, P, Hung, LW, Ingraham, P, Kalas, P, Konopacky, QM, Larkin, JE, Macintosh, B, Maire, J, Marchis, F, Marley, MS, Metchev, S, Millar-Blanchaer, MA, Oppenheimer, R, Palmer, DW, Patience, J, Perrin, M, Poyneer, LA, Pueyo, L, Rajan, A, Rantakyrö, FT, Savransky, D, Schneider, AC, Sivaramakrishnan, A, Song, I, Soummer, R, Thomas, S, Vega, D, Wallace, JK, Wang, JJ, Ward-Duong, K, Wiktorowicz, SJ & Wolff, SG 2017, 'Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager', Astronomical Journal, vol. 153, no. 4, 190. https://doi.org/10.3847/1538-3881/aa6480

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title = "Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager",

abstract = "We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager (GPI) as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J (1.12-1.3 μm) and H (1.50-1.80 μm) bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au (70-year) orbit with a 68% confidence interval between 14 and 28 au, an eccentricity of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log(Lbol/L⊙)=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object.",

keywords = "planetary systems, stars: individual (HD 984)",

author = "Mara Johnson-Groh and Christian Marois and {De Rosa}, {Robert J.} and Nielsen, {Eric L.} and Julien Rameau and Sarah Blunt and Jeffrey Vargas and Ammons, {S. Mark} and Bailey, {Vanessa P.} and Barman, {Travis S.} and Joanna Bulger and Chilcote, {Jeffrey K.} and Tara Cotten and Ren{\'e} Doyon and Gaspard Duch{\^e}ne and Fitzgerald, {Michael P.} and Follette, {Kate B.} and Stephen Goodsell and Graham, {James R.} and Greenbaum, {Alexandra Z.} and Pascale Hibon and Hung, {Li Wei} and Patrick Ingraham and Paul Kalas and Konopacky, {Quinn M.} and Larkin, {James E.} and Bruce Macintosh and J{\'e}r{\^o}me Maire and Franck Marchis and Marley, {Mark S.} and Stanimir Metchev and Millar-Blanchaer, {Maxwell A.} and Rebecca Oppenheimer and Palmer, {David W.} and Jennifer Patience and Marshall Perrin and Poyneer, {Lisa A.} and Laurent Pueyo and Abhijith Rajan and Rantakyr{\"o}, {Fredrik T.} and Dmitry Savransky and Schneider, {Adam C.} and Anand Sivaramakrishnan and Inseok Song and Remi Soummer and Sandrine Thomas and David Vega and Wallace, {J. Kent} and Wang, {Jason J.} and Kimberly Ward-Duong and Wiktorowicz, {Sloane J.} and Wolff, {Schuyler G.}",

year = "2017",

month = apr,

doi = "10.3847/1538-3881/aa6480",

language = "English (US)",

volume = "153",

journal = "Astronomical Journal",

issn = "0004-6256",

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T1 - Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager

AU - Johnson-Groh, Mara

AU - Marois, Christian

AU - De Rosa, Robert J.

AU - Nielsen, Eric L.

AU - Rameau, Julien

AU - Blunt, Sarah

AU - Vargas, Jeffrey

AU - Ammons, S. Mark

AU - Bailey, Vanessa P.

AU - Barman, Travis S.

AU - Bulger, Joanna

AU - Chilcote, Jeffrey K.

AU - Cotten, Tara

AU - Doyon, René

AU - Duchêne, Gaspard

AU - Fitzgerald, Michael P.

AU - Follette, Kate B.

AU - Goodsell, Stephen

AU - Graham, James R.

AU - Greenbaum, Alexandra Z.

AU - Hibon, Pascale

AU - Hung, Li Wei

AU - Ingraham, Patrick

AU - Kalas, Paul

AU - Konopacky, Quinn M.

AU - Larkin, James E.

AU - Macintosh, Bruce

AU - Maire, Jérôme

AU - Marchis, Franck

AU - Marley, Mark S.

AU - Metchev, Stanimir

AU - Millar-Blanchaer, Maxwell A.

AU - Oppenheimer, Rebecca

AU - Palmer, David W.

AU - Patience, Jennifer

AU - Perrin, Marshall

AU - Poyneer, Lisa A.

AU - Pueyo, Laurent

AU - Rajan, Abhijith

AU - Rantakyrö, Fredrik T.

AU - Savransky, Dmitry

AU - Schneider, Adam C.

AU - Sivaramakrishnan, Anand

AU - Song, Inseok

AU - Soummer, Remi

AU - Thomas, Sandrine

AU - Vega, David

AU - Wallace, J. Kent

AU - Wang, Jason J.

AU - Ward-Duong, Kimberly

AU - Wiktorowicz, Sloane J.

AU - Wolff, Schuyler G.

PY - 2017/4

Y1 - 2017/4

N2 - We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager (GPI) as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J (1.12-1.3 μm) and H (1.50-1.80 μm) bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au (70-year) orbit with a 68% confidence interval between 14 and 28 au, an eccentricity of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log(Lbol/L⊙)=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object.

AB - We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager (GPI) as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J (1.12-1.3 μm) and H (1.50-1.80 μm) bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au (70-year) orbit with a 68% confidence interval between 14 and 28 au, an eccentricity of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log(Lbol/L⊙)=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object.

KW - planetary systems

KW - stars: individual (HD 984)

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UR - http://www.scopus.com/inward/citedby.url?scp=85017315832&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/aa6480

DO - 10.3847/1538-3881/aa6480

M3 - Article

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SN - 0004-6256

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

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M1 - 190

ER -

Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager

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