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SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy

We report the direct imaging discovery of a low-mass companion to the nearby accelerating A star, HIP 109427, with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument coupled with the Microwave Kinetic Inductance Detector Exoplanet Camera (MEC) and CHARIS integral field spectrograph...

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Detalles Bibliográficos
Autores principales: Steiger, Sarah, Currie, Thayne, Brandt, Timothy D., Guyon, Olivier, Kuzuhara, Masayuki, Chilcote, Jeffrey, Groff, Tyler D., Lozi, Julien, Walter, Alexander B., Fruitwala, Neelay, Bailey III, John I., Zobrist, Nicholas, Swimmer, Noah, Lipartito, Isabel, Smith, Jennifer Pearl, Bockstiegel, Clint, Meeker, Seth R., Coiffard, Gregoire, Dodkins, Rupert, Szypryt, Paul, Davis, Kristina K., Daal, Miguel, Bumble, Bruce, Vievard, Sebastien, Sahoo, Ananya, Deo, Vincent, Jovanovic, Nemanja, Martinache, Frantz, Doppmann, Greg, Tamura, Motohide, Kasdin, N. Jeremy, Mazin, Benjamin A.
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:https://dx.doi.org/10.3847/1538-3881/ac02cc
http://cds.cern.ch/record/2777168
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author Steiger, Sarah
Currie, Thayne
Brandt, Timothy D.
Guyon, Olivier
Kuzuhara, Masayuki
Chilcote, Jeffrey
Groff, Tyler D.
Lozi, Julien
Walter, Alexander B.
Fruitwala, Neelay
Bailey III, John I.
Zobrist, Nicholas
Swimmer, Noah
Lipartito, Isabel
Smith, Jennifer Pearl
Bockstiegel, Clint
Meeker, Seth R.
Coiffard, Gregoire
Dodkins, Rupert
Szypryt, Paul
Davis, Kristina K.
Daal, Miguel
Bumble, Bruce
Vievard, Sebastien
Sahoo, Ananya
Deo, Vincent
Jovanovic, Nemanja
Martinache, Frantz
Doppmann, Greg
Tamura, Motohide
Kasdin, N. Jeremy
Mazin, Benjamin A.
author_facet Steiger, Sarah
Currie, Thayne
Brandt, Timothy D.
Guyon, Olivier
Kuzuhara, Masayuki
Chilcote, Jeffrey
Groff, Tyler D.
Lozi, Julien
Walter, Alexander B.
Fruitwala, Neelay
Bailey III, John I.
Zobrist, Nicholas
Swimmer, Noah
Lipartito, Isabel
Smith, Jennifer Pearl
Bockstiegel, Clint
Meeker, Seth R.
Coiffard, Gregoire
Dodkins, Rupert
Szypryt, Paul
Davis, Kristina K.
Daal, Miguel
Bumble, Bruce
Vievard, Sebastien
Sahoo, Ananya
Deo, Vincent
Jovanovic, Nemanja
Martinache, Frantz
Doppmann, Greg
Tamura, Motohide
Kasdin, N. Jeremy
Mazin, Benjamin A.
author_sort Steiger, Sarah
collection CERN
description We report the direct imaging discovery of a low-mass companion to the nearby accelerating A star, HIP 109427, with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument coupled with the Microwave Kinetic Inductance Detector Exoplanet Camera (MEC) and CHARIS integral field spectrograph. CHARIS data reduced with reference star point spread function (PSF) subtraction yield 1.1–2.4 $\mu$m spectra. MEC reveals the companion in $Y$ and $J$ band at a comparable signal-to-noise ratio using stochastic speckle discrimination, with no PSF subtraction techniques. Combined with complementary follow-up $L$$_{p}$ photometry from Keck/NIRC2, the SCExAO data favors a spectral type, effective temperature, and luminosity of M4–M5.5, 3000–3200 K, and , respectively. Relative astrometry of HIP 109427 B from SCExAO/CHARIS and Keck/NIRC2, and complementary Gaia–Hipparcos absolute astrometry of the primary favor a semimajor axis of 6.55$^{+3.0}$ $_{−0.48}$ au, an eccentricity of , an inclination of degrees, and a dynamical mass of $M$⊙. This work shows the potential for extreme AO systems to utilize speckle statistics in addition to widely used postprocessing methods to directly image faint companions to nearby stars near the telescope diffraction limit.
id cern-2777168
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
record_format invenio
spelling cern-27771682023-01-31T09:04:34Zdoi:10.3847/1538-3881/ac02cchttp://cds.cern.ch/record/2777168engSteiger, SarahCurrie, ThayneBrandt, Timothy D.Guyon, OlivierKuzuhara, MasayukiChilcote, JeffreyGroff, Tyler D.Lozi, JulienWalter, Alexander B.Fruitwala, NeelayBailey III, John I.Zobrist, NicholasSwimmer, NoahLipartito, IsabelSmith, Jennifer PearlBockstiegel, ClintMeeker, Seth R.Coiffard, GregoireDodkins, RupertSzypryt, PaulDavis, Kristina K.Daal, MiguelBumble, BruceVievard, SebastienSahoo, AnanyaDeo, VincentJovanovic, NemanjaMartinache, FrantzDoppmann, GregTamura, MotohideKasdin, N. JeremyMazin, Benjamin A.SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopyastro-ph.IMAstrophysics and Astronomyastro-ph.EPAstrophysics and Astronomyastro-ph.SRAstrophysics and AstronomyWe report the direct imaging discovery of a low-mass companion to the nearby accelerating A star, HIP 109427, with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument coupled with the Microwave Kinetic Inductance Detector Exoplanet Camera (MEC) and CHARIS integral field spectrograph. CHARIS data reduced with reference star point spread function (PSF) subtraction yield 1.1–2.4 $\mu$m spectra. MEC reveals the companion in $Y$ and $J$ band at a comparable signal-to-noise ratio using stochastic speckle discrimination, with no PSF subtraction techniques. Combined with complementary follow-up $L$$_{p}$ photometry from Keck/NIRC2, the SCExAO data favors a spectral type, effective temperature, and luminosity of M4–M5.5, 3000–3200 K, and , respectively. Relative astrometry of HIP 109427 B from SCExAO/CHARIS and Keck/NIRC2, and complementary Gaia–Hipparcos absolute astrometry of the primary favor a semimajor axis of 6.55$^{+3.0}$ $_{−0.48}$ au, an eccentricity of , an inclination of degrees, and a dynamical mass of $M$⊙. This work shows the potential for extreme AO systems to utilize speckle statistics in addition to widely used postprocessing methods to directly image faint companions to nearby stars near the telescope diffraction limit.We report the direct imaging discovery of a low-mass companion to the nearby accelerating A star, HIP 109427, with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument coupled with the MKID Exoplanet Camera (MEC) and CHARIS integral field spectrograph. CHARIS data reduced with reference star PSF subtraction yield 1.1-2.4 $\mu$m spectra. MEC reveals the companion in $Y$ and $J$ band at a comparable signal-to-noise ratio using stochastic speckle discrimination, with no PSF subtraction techniques. Combined with complementary follow-up $L_{\rm p}$ photometry from Keck/NIRC2, the SCExAO data favors a spectral type, effective temperature, and luminosity of M4-M5.5, 3000-3200 $K$, and $\log_{10}(L/L_{\rm \odot}) = -2.28^{+0.04}_{-0.04}$, respectively. Relative astrometry of HIP 109427 B from SCExAO/CHARIS and Keck/NIRC2, and complementary Gaia-Hipparcos absolute astrometry of the primary favor a semimajor axis of $6.55^{+3.0}_{-0.48}$ au, an eccentricity of $0.54^{+0.28}_{-0.15}$, an inclination of $66.7^{+8.5}_{-14}$ degrees, and a dynamical mass of $0.280^{+0.18}_{-0.059}$$M_{\odot}$. This work shows the potential for extreme AO systems to utilize speckle statistics in addition to widely-used post-processing methods to directly image faint companions to nearby stars near the telescope diffraction limit.arXiv:2103.06898oai:cds.cern.ch:27771682021-03-11
spellingShingle astro-ph.IM
Astrophysics and Astronomy
astro-ph.EP
Astrophysics and Astronomy
astro-ph.SR
Astrophysics and Astronomy
Steiger, Sarah
Currie, Thayne
Brandt, Timothy D.
Guyon, Olivier
Kuzuhara, Masayuki
Chilcote, Jeffrey
Groff, Tyler D.
Lozi, Julien
Walter, Alexander B.
Fruitwala, Neelay
Bailey III, John I.
Zobrist, Nicholas
Swimmer, Noah
Lipartito, Isabel
Smith, Jennifer Pearl
Bockstiegel, Clint
Meeker, Seth R.
Coiffard, Gregoire
Dodkins, Rupert
Szypryt, Paul
Davis, Kristina K.
Daal, Miguel
Bumble, Bruce
Vievard, Sebastien
Sahoo, Ananya
Deo, Vincent
Jovanovic, Nemanja
Martinache, Frantz
Doppmann, Greg
Tamura, Motohide
Kasdin, N. Jeremy
Mazin, Benjamin A.
SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title_full SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title_fullStr SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title_full_unstemmed SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title_short SCExAO/MEC and CHARIS Discovery of a Low-mass, 6 au Separation Companion to HIP 109427 Using Stochastic Speckle Discrimination and High-contrast Spectroscopy
title_sort scexao/mec and charis discovery of a low-mass, 6 au separation companion to hip 109427 using stochastic speckle discrimination and high-contrast spectroscopy
topic astro-ph.IM
Astrophysics and Astronomy
astro-ph.EP
Astrophysics and Astronomy
astro-ph.SR
Astrophysics and Astronomy
url https://dx.doi.org/10.3847/1538-3881/ac02cc
http://cds.cern.ch/record/2777168
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