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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2404.07742 |
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| author | Ó, Clarissa R. Do Sappey, Ben Konopacky, Quinn M. Ruffio, Jean-Baptiste O'Neil, Kelly K. Do, Tuan Martinez, Gregory Barman, Travis S. Nguyen, Jayke S. Xuan, Jerry W. Theissen, Christopher A. Blunt, Sarah Thompson, William Hsu, Chih-Chun Baker, Ashley Bartos, Randall Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppmann, Greg Echeverri, Daniel Finnerty, Luke Fitzgerald, Michael P. Inglis, Julie Jovanovic, Nemanja López, Ronald A. Mawet, Dimitri Morris, Evan Pezzato, Jacklyn Schofield, Tobias Skemer, Andrew Wallace, J. Kent Wang, Jason J. Wang, Ji Liberman, Joshua |
| author_facet | Ó, Clarissa R. Do Sappey, Ben Konopacky, Quinn M. Ruffio, Jean-Baptiste O'Neil, Kelly K. Do, Tuan Martinez, Gregory Barman, Travis S. Nguyen, Jayke S. Xuan, Jerry W. Theissen, Christopher A. Blunt, Sarah Thompson, William Hsu, Chih-Chun Baker, Ashley Bartos, Randall Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppmann, Greg Echeverri, Daniel Finnerty, Luke Fitzgerald, Michael P. Inglis, Julie Jovanovic, Nemanja López, Ronald A. Mawet, Dimitri Morris, Evan Pezzato, Jacklyn Schofield, Tobias Skemer, Andrew Wallace, J. Kent Wang, Jason J. Wang, Ji Liberman, Joshua |
| contents | The 1RXS J034231.8+121622 system consists of an M dwarf primary and a directly imaged low-mass stellar companion. We use high resolution spectroscopic data from Keck/KPIC to estimate the objects' atmospheric parameters and radial velocities (RVs). Using PHOENIX stellar models, we find that the primary has a temperature of 3460 $\pm$ 50 K a metallicity of 0.16 $\pm$ 0.04, while the secondary has a temperature of 2510 $\pm$ 50 K and a metallicity of $0.13\substack{+0.12 \\ -0.11}$. Recent work suggests this system is associated with the Hyades, placing it an older age than previous estimates. Both metallicities agree with current $[Fe/H]$ Hyades measurements (0.11 -- 0.21). Using stellar evolutionary models, we obtain significantly higher masses for the objects, of 0.30 $\pm$ 0.15 $M_\odot$ and 0.08 $\pm$ 0.01 $M_\odot$ (84 $\pm$ 11 $M_{Jup}$) respectively. Using the RVs and a new astrometry point from Keck/NIRC2, we find that the system is likely an edge-on, moderately eccentric ($0.41\substack{+0.27 \\ -0.08}$) configuration. We also estimate the C/O ratio of both objects using custom grid models, obtaining 0.42 $\pm$ 0.10 (primary) and 0.55 $\pm$ 0.10 (companion). From these results, we confirm that this system most likely went through a binary star formation process in the Hyades. The significant changes in this system's parameters since its discovery highlight the importance of high resolution spectroscopy for both orbital and atmospheric characterization of directly imaged companions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07742 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Orbital and Atmospheric Characterization of the 1RXS J034231.8+121622 System Using High-Resolution Spectroscopy Confirms That The Companion is a Low-Mass Star Ó, Clarissa R. Do Sappey, Ben Konopacky, Quinn M. Ruffio, Jean-Baptiste O'Neil, Kelly K. Do, Tuan Martinez, Gregory Barman, Travis S. Nguyen, Jayke S. Xuan, Jerry W. Theissen, Christopher A. Blunt, Sarah Thompson, William Hsu, Chih-Chun Baker, Ashley Bartos, Randall Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppmann, Greg Echeverri, Daniel Finnerty, Luke Fitzgerald, Michael P. Inglis, Julie Jovanovic, Nemanja López, Ronald A. Mawet, Dimitri Morris, Evan Pezzato, Jacklyn Schofield, Tobias Skemer, Andrew Wallace, J. Kent Wang, Jason J. Wang, Ji Liberman, Joshua Solar and Stellar Astrophysics Earth and Planetary Astrophysics The 1RXS J034231.8+121622 system consists of an M dwarf primary and a directly imaged low-mass stellar companion. We use high resolution spectroscopic data from Keck/KPIC to estimate the objects' atmospheric parameters and radial velocities (RVs). Using PHOENIX stellar models, we find that the primary has a temperature of 3460 $\pm$ 50 K a metallicity of 0.16 $\pm$ 0.04, while the secondary has a temperature of 2510 $\pm$ 50 K and a metallicity of $0.13\substack{+0.12 \\ -0.11}$. Recent work suggests this system is associated with the Hyades, placing it an older age than previous estimates. Both metallicities agree with current $[Fe/H]$ Hyades measurements (0.11 -- 0.21). Using stellar evolutionary models, we obtain significantly higher masses for the objects, of 0.30 $\pm$ 0.15 $M_\odot$ and 0.08 $\pm$ 0.01 $M_\odot$ (84 $\pm$ 11 $M_{Jup}$) respectively. Using the RVs and a new astrometry point from Keck/NIRC2, we find that the system is likely an edge-on, moderately eccentric ($0.41\substack{+0.27 \\ -0.08}$) configuration. We also estimate the C/O ratio of both objects using custom grid models, obtaining 0.42 $\pm$ 0.10 (primary) and 0.55 $\pm$ 0.10 (companion). From these results, we confirm that this system most likely went through a binary star formation process in the Hyades. The significant changes in this system's parameters since its discovery highlight the importance of high resolution spectroscopy for both orbital and atmospheric characterization of directly imaged companions. |
| title | Orbital and Atmospheric Characterization of the 1RXS J034231.8+121622 System Using High-Resolution Spectroscopy Confirms That The Companion is a Low-Mass Star |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2404.07742 |