Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994
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| Format: | Preprint |
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2024
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| author | Martinez, Romy Rodriguez Eastman, Jason D. Collins, Karen Rodriguez, Joseph Charbonneau, David Quinn, Samuel Latham, David W. Ziegler, Carl Brahm, Rafael Fairnington, Tyler Ulmer-Moll, Solene Stassun, Keivan Suarez, Olga Guillot, Tristan Hobson, Melissa Winn, Joshua N. Kanodia, Shubham Schlecker, Martin Butler, R. P. Crane, Jeffrey D. Shectman, Steve Teske, Johanna K. Osip, David Beletsky, Yuri Battley, Matthew P. Psaridi, Angelica Figueira, Pedro Lendl, Monika Bouche, Francois Udry, Stephane Kunimoto, Michelle Mekarnia, Dejamel Abe, Lyu Trifonov, Trifonov Pinto, Marcelo T. Eberhardt, Jan Espinoza, Nestor Henning, Thomas Jordan, Andres Rojas, Felipe I. Barkaoui, Khalid Relles, Howard M. Srdoc, Gregor Collins, Kevin I. Seager, Sara Shporer, Avi Vezie, Michael Hedges, Christina L. Mireles, Ismael |
| author_facet | Martinez, Romy Rodriguez Eastman, Jason D. Collins, Karen Rodriguez, Joseph Charbonneau, David Quinn, Samuel Latham, David W. Ziegler, Carl Brahm, Rafael Fairnington, Tyler Ulmer-Moll, Solene Stassun, Keivan Suarez, Olga Guillot, Tristan Hobson, Melissa Winn, Joshua N. Kanodia, Shubham Schlecker, Martin Butler, R. P. Crane, Jeffrey D. Shectman, Steve Teske, Johanna K. Osip, David Beletsky, Yuri Battley, Matthew P. Psaridi, Angelica Figueira, Pedro Lendl, Monika Bouche, Francois Udry, Stephane Kunimoto, Michelle Mekarnia, Dejamel Abe, Lyu Trifonov, Trifonov Pinto, Marcelo T. Eberhardt, Jan Espinoza, Nestor Henning, Thomas Jordan, Andres Rojas, Felipe I. Barkaoui, Khalid Relles, Howard M. Srdoc, Gregor Collins, Kevin I. Seager, Sara Shporer, Avi Vezie, Michael Hedges, Christina L. Mireles, Ismael |
| contents | We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite (TESS). TOI-4994b transits a G-type star (V = 12.6 mag) with a mass, radius, and effective temperature of $M_{\star} =1.005^{+0.064}_{-0.061} M_{\odot}$, $R_{\star} = 1.055^{+0.040}_{-0.037} R_{\odot}$, and $T_{\rm eff} = 5640 \pm 110$ K. We obtained follow-up ground-based photometry from the Las Cumbres Observatory (LCO) and the Antarctic Search for Transiting ExoPlanets (ASTEP) telescopes, and we confirmed the planetary nature of TOI-4994b with multiple radial velocity observations from the PFS, CHIRON, HARPS, FEROS, and CORALIE instruments. From a global fit to the photometry and radial velocities, we determine that TOI-4994b is in a 21.5-day, eccentric orbit ($e = 0.32 \pm 0.04$) and has a mass of $M_{P}= 0.280^{+0.037}_{-0.034} M_{J}$, a radius of $R_{P}= 0.762^{+0.030}_{-0.027}R_{J}$, and a Saturn-like bulk density of $ρ_{p} = 0.78^{+0.16}_{-0.14}$ $\rm g/cm^3$. We find that TOI-4994 is a potentially viable candidate for follow-up stellar obliquity measurements. TOI-4994b joins the small sample of warm Saturn analogs and thus sheds light on our understanding of these rare and unique worlds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_02769 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994 Martinez, Romy Rodriguez Eastman, Jason D. Collins, Karen Rodriguez, Joseph Charbonneau, David Quinn, Samuel Latham, David W. Ziegler, Carl Brahm, Rafael Fairnington, Tyler Ulmer-Moll, Solene Stassun, Keivan Suarez, Olga Guillot, Tristan Hobson, Melissa Winn, Joshua N. Kanodia, Shubham Schlecker, Martin Butler, R. P. Crane, Jeffrey D. Shectman, Steve Teske, Johanna K. Osip, David Beletsky, Yuri Battley, Matthew P. Psaridi, Angelica Figueira, Pedro Lendl, Monika Bouche, Francois Udry, Stephane Kunimoto, Michelle Mekarnia, Dejamel Abe, Lyu Trifonov, Trifonov Pinto, Marcelo T. Eberhardt, Jan Espinoza, Nestor Henning, Thomas Jordan, Andres Rojas, Felipe I. Barkaoui, Khalid Relles, Howard M. Srdoc, Gregor Collins, Kevin I. Seager, Sara Shporer, Avi Vezie, Michael Hedges, Christina L. Mireles, Ismael Earth and Planetary Astrophysics We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite (TESS). TOI-4994b transits a G-type star (V = 12.6 mag) with a mass, radius, and effective temperature of $M_{\star} =1.005^{+0.064}_{-0.061} M_{\odot}$, $R_{\star} = 1.055^{+0.040}_{-0.037} R_{\odot}$, and $T_{\rm eff} = 5640 \pm 110$ K. We obtained follow-up ground-based photometry from the Las Cumbres Observatory (LCO) and the Antarctic Search for Transiting ExoPlanets (ASTEP) telescopes, and we confirmed the planetary nature of TOI-4994b with multiple radial velocity observations from the PFS, CHIRON, HARPS, FEROS, and CORALIE instruments. From a global fit to the photometry and radial velocities, we determine that TOI-4994b is in a 21.5-day, eccentric orbit ($e = 0.32 \pm 0.04$) and has a mass of $M_{P}= 0.280^{+0.037}_{-0.034} M_{J}$, a radius of $R_{P}= 0.762^{+0.030}_{-0.027}R_{J}$, and a Saturn-like bulk density of $ρ_{p} = 0.78^{+0.16}_{-0.14}$ $\rm g/cm^3$. We find that TOI-4994 is a potentially viable candidate for follow-up stellar obliquity measurements. TOI-4994b joins the small sample of warm Saturn analogs and thus sheds light on our understanding of these rare and unique worlds. |
| title | Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994 |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2412.02769 |