Asteroseismology of the Nearby K-Dwarf $σ$ Draconis using the Keck Planet Finder and TESS
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| Natura: | Preprint |
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2024
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| author | Hon, Marc Huber, Daniel Li, Yaguang Metcalfe, Travis S. Bedding, Timothy R. Ong, Joel Chontos, Ashley Rubenzahl, Ryan Halverson, Samuel García, Rafael A. Kjeldsen, Hans Stello, Dennis Hey, Daniel R. Campante, Tiago Howard, Andrew W. Gibson, Steven R. Rider, Kodi Roy, Arpita Baker, Ashley D. Edelstein, Jerry Smith, Chris Fulton, Benjamin J. Walawender, Josh Brodheim, Max Brown, Matt Chan, Dwight Dai, Fei Deich, William Gottschalk, Colby Grillo, Jason Hale, Dave Hill, Grant M. Holden, Bradford Householder, Aaron Isaacson, Howard Ishikawa, Yuzo Jelinsky, Sharon R. Kassis, Marc Kaye, Stephen Laher, Russ Lanclos, Kyle Lee, Chien-Hsiu Lilley, Scott McCarney, Ben Miller, Timothy N. Payne, Joel Petigura, Erik A. Poppett, Claire Raffanti, Michael Rockosi, Constance Sanford, Dale Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Roger Thorne, Jim Valliant, John Vandenberg, Adam Wang, Shin Ywan Wishnow, Edward Wold, Truman Yeh, Sherry Baker, Ashley Basu, Sarbani Bedell, Megan Cegla, Heather M. Crossfield, Ian Dressing, Courtney Dumusque, Xavier Knutson, Heather Mawet, Dimitri O'Meara, John Stefánsson, Guðmundur Teske, Johanna Vasisht, Gautam Wang, Sharon Xuesong Weiss, Lauren M. Winn, Joshua N. Wright, Jason T. |
| author_facet | Hon, Marc Huber, Daniel Li, Yaguang Metcalfe, Travis S. Bedding, Timothy R. Ong, Joel Chontos, Ashley Rubenzahl, Ryan Halverson, Samuel García, Rafael A. Kjeldsen, Hans Stello, Dennis Hey, Daniel R. Campante, Tiago Howard, Andrew W. Gibson, Steven R. Rider, Kodi Roy, Arpita Baker, Ashley D. Edelstein, Jerry Smith, Chris Fulton, Benjamin J. Walawender, Josh Brodheim, Max Brown, Matt Chan, Dwight Dai, Fei Deich, William Gottschalk, Colby Grillo, Jason Hale, Dave Hill, Grant M. Holden, Bradford Householder, Aaron Isaacson, Howard Ishikawa, Yuzo Jelinsky, Sharon R. Kassis, Marc Kaye, Stephen Laher, Russ Lanclos, Kyle Lee, Chien-Hsiu Lilley, Scott McCarney, Ben Miller, Timothy N. Payne, Joel Petigura, Erik A. Poppett, Claire Raffanti, Michael Rockosi, Constance Sanford, Dale Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Roger Thorne, Jim Valliant, John Vandenberg, Adam Wang, Shin Ywan Wishnow, Edward Wold, Truman Yeh, Sherry Baker, Ashley Basu, Sarbani Bedell, Megan Cegla, Heather M. Crossfield, Ian Dressing, Courtney Dumusque, Xavier Knutson, Heather Mawet, Dimitri O'Meara, John Stefánsson, Guðmundur Teske, Johanna Vasisht, Gautam Wang, Sharon Xuesong Weiss, Lauren M. Winn, Joshua N. Wright, Jason T. |
| contents | Asteroseismology of dwarf stars cooler than the Sun is very challenging due to the low amplitudes and rapid timescales of oscillations. Here, we present the asteroseismic detection of solar-like oscillations at 4-minute timescales ($ν_{\mathrm{max}}\sim4300μ$Hz) in the nearby K-dwarf $σ$ Draconis using extreme precision Doppler velocity observations from the Keck Planet Finder and 20-second cadence photometry from NASA's Transiting Exoplanet Survey Satellite. The star is the coolest dwarf star to date with both velocity and luminosity observations of solar-like oscillations, having amplitudes of $5.9\pm0.8\,$cm$\,\text{s}^{-1}$ and $0.8\pm0.2$ ppm, respectively. These measured values are in excellent agreement with established luminosity-velocity amplitude relations for oscillations and provide further evidence that mode amplitudes for stars with $T_{\mathrm{eff}}<\,5500\,$K diminish in scale following a $(L/M)^{1.5}$ relation. By modeling the star's oscillation frequencies from photometric data, we measure an asteroseismic age of $4.5\pm0.9\,\rm{(ran)} \pm 1.2\,\rm{(sys)}$ Gyr. The observations demonstrate the capability of next-generation spectrographs and precise space-based photometry to extend observational asteroseismology to nearby cool dwarfs, which are benchmarks for stellar astrophysics and prime targets for directly imaging planets using future space-based telescopes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21234 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Asteroseismology of the Nearby K-Dwarf $σ$ Draconis using the Keck Planet Finder and TESS Hon, Marc Huber, Daniel Li, Yaguang Metcalfe, Travis S. Bedding, Timothy R. Ong, Joel Chontos, Ashley Rubenzahl, Ryan Halverson, Samuel García, Rafael A. Kjeldsen, Hans Stello, Dennis Hey, Daniel R. Campante, Tiago Howard, Andrew W. Gibson, Steven R. Rider, Kodi Roy, Arpita Baker, Ashley D. Edelstein, Jerry Smith, Chris Fulton, Benjamin J. Walawender, Josh Brodheim, Max Brown, Matt Chan, Dwight Dai, Fei Deich, William Gottschalk, Colby Grillo, Jason Hale, Dave Hill, Grant M. Holden, Bradford Householder, Aaron Isaacson, Howard Ishikawa, Yuzo Jelinsky, Sharon R. Kassis, Marc Kaye, Stephen Laher, Russ Lanclos, Kyle Lee, Chien-Hsiu Lilley, Scott McCarney, Ben Miller, Timothy N. Payne, Joel Petigura, Erik A. Poppett, Claire Raffanti, Michael Rockosi, Constance Sanford, Dale Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Roger Thorne, Jim Valliant, John Vandenberg, Adam Wang, Shin Ywan Wishnow, Edward Wold, Truman Yeh, Sherry Baker, Ashley Basu, Sarbani Bedell, Megan Cegla, Heather M. Crossfield, Ian Dressing, Courtney Dumusque, Xavier Knutson, Heather Mawet, Dimitri O'Meara, John Stefánsson, Guðmundur Teske, Johanna Vasisht, Gautam Wang, Sharon Xuesong Weiss, Lauren M. Winn, Joshua N. Wright, Jason T. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Asteroseismology of dwarf stars cooler than the Sun is very challenging due to the low amplitudes and rapid timescales of oscillations. Here, we present the asteroseismic detection of solar-like oscillations at 4-minute timescales ($ν_{\mathrm{max}}\sim4300μ$Hz) in the nearby K-dwarf $σ$ Draconis using extreme precision Doppler velocity observations from the Keck Planet Finder and 20-second cadence photometry from NASA's Transiting Exoplanet Survey Satellite. The star is the coolest dwarf star to date with both velocity and luminosity observations of solar-like oscillations, having amplitudes of $5.9\pm0.8\,$cm$\,\text{s}^{-1}$ and $0.8\pm0.2$ ppm, respectively. These measured values are in excellent agreement with established luminosity-velocity amplitude relations for oscillations and provide further evidence that mode amplitudes for stars with $T_{\mathrm{eff}}<\,5500\,$K diminish in scale following a $(L/M)^{1.5}$ relation. By modeling the star's oscillation frequencies from photometric data, we measure an asteroseismic age of $4.5\pm0.9\,\rm{(ran)} \pm 1.2\,\rm{(sys)}$ Gyr. The observations demonstrate the capability of next-generation spectrographs and precise space-based photometry to extend observational asteroseismology to nearby cool dwarfs, which are benchmarks for stellar astrophysics and prime targets for directly imaging planets using future space-based telescopes. |
| title | Asteroseismology of the Nearby K-Dwarf $σ$ Draconis using the Keck Planet Finder and TESS |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2407.21234 |