Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2310.11775 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866929338735132672 |
|---|---|
| author | Jones, Sinclaire E. Stefansson, Gudmundur Masuda, Kento Libby-Roberts, Jessica E. Gardner, Cristilyn N. Holcomb, Rae Beard, Corey Robertson, Paul Cañas, Caleb I. Mahadevan, Suvrath Kanodia, Shubham Lin, Andrea S. J. Kobulnicky, Henry A. Parker, Brock A. Bender, Chad F. Cochran, William D. Diddams, Scott A. Fernandes, Rachel B. Gupta, Arvind F. Halverson, Samuel Hawley, Suzanne L. Hearty, Fred R. Hebb, Leslie Kowalski, Adam Lubin, Jack Monson, Andrew Ninan, Joe P. Ramsey, Lawrence Roy, Arpita Schwab, Christian Terrien, Ryan C. Wisniewski, John |
| author_facet | Jones, Sinclaire E. Stefansson, Gudmundur Masuda, Kento Libby-Roberts, Jessica E. Gardner, Cristilyn N. Holcomb, Rae Beard, Corey Robertson, Paul Cañas, Caleb I. Mahadevan, Suvrath Kanodia, Shubham Lin, Andrea S. J. Kobulnicky, Henry A. Parker, Brock A. Bender, Chad F. Cochran, William D. Diddams, Scott A. Fernandes, Rachel B. Gupta, Arvind F. Halverson, Samuel Hawley, Suzanne L. Hearty, Fred R. Hebb, Leslie Kowalski, Adam Lubin, Jack Monson, Andrew Ninan, Joe P. Ramsey, Lawrence Roy, Arpita Schwab, Christian Terrien, Ryan C. Wisniewski, John |
| contents | We report the discovery of a close-in ($P_{\mathrm{orb}} = 3.349\:\mathrm{days}$) warm Neptune with clear transit timing variations (TTVs) orbiting the nearby ($d=47.3\:\mathrm{pc}$) active M4 star, TOI-2015. We characterize the planet's properties using TESS photometry, precise near-infrared radial velocities (RV) with the Habitable-zone Planet Finder (HP) Spectrograph, ground-based photometry, and high-contrast imaging. A joint photometry and RV fit yields a radius $R_p~=~3.37_{-0.20}^{+0.15} \:\mathrm{R_\oplus}$, mass $m_p~=~16.4_{-4.1}^{+4.1}\:\mathrm{M_\oplus}$, and density $ρ_p~=~2.32_{-0.37}^{+0.38} \:\mathrm{g cm^{-3}}$ for TOI-2015b, suggesting a likely volatile-rich planet. The young, active host star has a rotation period of $P_{\mathrm{rot}}~=~8.7 \pm~0.9~\mathrm{days}$ and associated rotation-based age estimate of $1.1~\pm~0.1\:\mathrm{Gyr}$. Though no other transiting planets are seen in the TESS data, the system shows clear TTVs of super period $P_{\mathrm{sup}}~\approx~430\:\mathrm{days}$ and amplitude $\sim$$100\:\mathrm{minutes}$. After considering multiple likely period ratio models, we show an outer planet candidate near a 2:1 resonance can explain the observed TTVs while offering a dynamically stable solution. However, other possible two-planet solutions -- including 3:2 and 4:3 resonance -- cannot be conclusively excluded without further observations. Assuming a 2:1 resonance in the joint TTV-RV modeling suggests a mass of $m_b~=~13.3_{-4.5}^{+4.7}\:\mathrm{M_\oplus}$ for TOI-2015b and $m_c~=~6.8_{-2.3}^{+3.5}\:\mathrm{M_\oplus}$ for the outer candidate. Additional transit and RV observations will be beneficial to explicitly identify the resonance and further characterize the properties of the system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_11775 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | TOI-2015b: A Warm Neptune with Transit Timing Variations Orbiting an Active mid M Dwarf Jones, Sinclaire E. Stefansson, Gudmundur Masuda, Kento Libby-Roberts, Jessica E. Gardner, Cristilyn N. Holcomb, Rae Beard, Corey Robertson, Paul Cañas, Caleb I. Mahadevan, Suvrath Kanodia, Shubham Lin, Andrea S. J. Kobulnicky, Henry A. Parker, Brock A. Bender, Chad F. Cochran, William D. Diddams, Scott A. Fernandes, Rachel B. Gupta, Arvind F. Halverson, Samuel Hawley, Suzanne L. Hearty, Fred R. Hebb, Leslie Kowalski, Adam Lubin, Jack Monson, Andrew Ninan, Joe P. Ramsey, Lawrence Roy, Arpita Schwab, Christian Terrien, Ryan C. Wisniewski, John Earth and Planetary Astrophysics We report the discovery of a close-in ($P_{\mathrm{orb}} = 3.349\:\mathrm{days}$) warm Neptune with clear transit timing variations (TTVs) orbiting the nearby ($d=47.3\:\mathrm{pc}$) active M4 star, TOI-2015. We characterize the planet's properties using TESS photometry, precise near-infrared radial velocities (RV) with the Habitable-zone Planet Finder (HP) Spectrograph, ground-based photometry, and high-contrast imaging. A joint photometry and RV fit yields a radius $R_p~=~3.37_{-0.20}^{+0.15} \:\mathrm{R_\oplus}$, mass $m_p~=~16.4_{-4.1}^{+4.1}\:\mathrm{M_\oplus}$, and density $ρ_p~=~2.32_{-0.37}^{+0.38} \:\mathrm{g cm^{-3}}$ for TOI-2015b, suggesting a likely volatile-rich planet. The young, active host star has a rotation period of $P_{\mathrm{rot}}~=~8.7 \pm~0.9~\mathrm{days}$ and associated rotation-based age estimate of $1.1~\pm~0.1\:\mathrm{Gyr}$. Though no other transiting planets are seen in the TESS data, the system shows clear TTVs of super period $P_{\mathrm{sup}}~\approx~430\:\mathrm{days}$ and amplitude $\sim$$100\:\mathrm{minutes}$. After considering multiple likely period ratio models, we show an outer planet candidate near a 2:1 resonance can explain the observed TTVs while offering a dynamically stable solution. However, other possible two-planet solutions -- including 3:2 and 4:3 resonance -- cannot be conclusively excluded without further observations. Assuming a 2:1 resonance in the joint TTV-RV modeling suggests a mass of $m_b~=~13.3_{-4.5}^{+4.7}\:\mathrm{M_\oplus}$ for TOI-2015b and $m_c~=~6.8_{-2.3}^{+3.5}\:\mathrm{M_\oplus}$ for the outer candidate. Additional transit and RV observations will be beneficial to explicitly identify the resonance and further characterize the properties of the system. |
| title | TOI-2015b: A Warm Neptune with Transit Timing Variations Orbiting an Active mid M Dwarf |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2310.11775 |