The TESS-Keck Survey XXI: 13 New Planets and Homogeneous Properties for 21 Subgiant Systems
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2024
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| author | Chontos, Ashley Huber, Daniel Grunblatt, Samuel K. Saunders, Nicholas Winn, Joshua N. McCormack, Mason Knudstrup, Emil Albrecht, Simon H. Crossfield, Ian J. M. Rodriguez, Joseph E. Ciardi, David R. Collins, Karen A. Jenkins, Jon M. Bieryla, Allyson Batalha, Natalie M. Beard, Corey Dai, Fei Dalba, Paul A. Fetherolf, Tara Giacalone, Steven Hill, Michelle L. Howard, Andrew W. Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Močnik, Teo Murphy, Joseph M. Akana Petigura, Erik A. Pidhorodetska, Daria Polanski, Alex S. Robertson, Paul Rubenzahl, Ryan A. Turtelboom, Emma V. Weiss, Lauren M. Van Zandt, Judah Rocker, George R. Vanderspek, Roland Latham, David W. Seager, Sara Quinn, Samuel N. Shporer, Avi Eisner, Nora L. Goeke, Robert F. Levine, Alan M. Ting, Eric B. Howell, Steve Schlieder, Joshua E. Benni, Paul Boyle, Andrew W. Gan, Tianjun Girardin, Eric Gonzalez, Erica Gregorio, Joao Horne, Keith Livingston, John Lund, Michael B. Mann, Christopher R. Massey, Bob Matthews, Elisabeth C. McLeod, Kim K. Palle, Enric Popowicz, Adam Relles, Howard M. Schwarz, Richard P. Sefako, Ramotholo Srdoc, Grego Tan, Thiam-Guan Wang, Gavin Ziegler, Carl |
| author_facet | Chontos, Ashley Huber, Daniel Grunblatt, Samuel K. Saunders, Nicholas Winn, Joshua N. McCormack, Mason Knudstrup, Emil Albrecht, Simon H. Crossfield, Ian J. M. Rodriguez, Joseph E. Ciardi, David R. Collins, Karen A. Jenkins, Jon M. Bieryla, Allyson Batalha, Natalie M. Beard, Corey Dai, Fei Dalba, Paul A. Fetherolf, Tara Giacalone, Steven Hill, Michelle L. Howard, Andrew W. Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Močnik, Teo Murphy, Joseph M. Akana Petigura, Erik A. Pidhorodetska, Daria Polanski, Alex S. Robertson, Paul Rubenzahl, Ryan A. Turtelboom, Emma V. Weiss, Lauren M. Van Zandt, Judah Rocker, George R. Vanderspek, Roland Latham, David W. Seager, Sara Quinn, Samuel N. Shporer, Avi Eisner, Nora L. Goeke, Robert F. Levine, Alan M. Ting, Eric B. Howell, Steve Schlieder, Joshua E. Benni, Paul Boyle, Andrew W. Gan, Tianjun Girardin, Eric Gonzalez, Erica Gregorio, Joao Horne, Keith Livingston, John Lund, Michael B. Mann, Christopher R. Massey, Bob Matthews, Elisabeth C. McLeod, Kim K. Palle, Enric Popowicz, Adam Relles, Howard M. Schwarz, Richard P. Sefako, Ramotholo Srdoc, Grego Tan, Thiam-Guan Wang, Gavin Ziegler, Carl |
| contents | We present a dedicated transit and radial velocity survey of planets orbiting subgiant stars observed by the TESS Mission. Using $\sim$$16$ nights on Keck/HIRES, we confirm and characterize $12$ new transiting planets -- $\rm TOI-329\,b$, $\rm HD\,39688\,b$ ($\rm TOI-480$), $\rm TOI-603\,b$, $\rm TOI-1199\,b$, $\rm TOI-1294\,b$, $\rm TOI-1439\,b$, $\rm TOI-1605\,b$, $\rm TOI-1828\,b$, $\rm HD\,148193\,b$ ($\rm TOI-1836$), $\rm TOI-1885\,b$, $\rm HD\,83342\,b$ ($\rm TOI-1898$), $\rm TOI-2019\,b$ -- and provide updated properties for 9 previously confirmed TESS subgiant systems ($\rm TOI-197$, $\rm TOI-954$, $\rm TOI-1181$, $\rm TOI-1296$, $\rm TOI-1298$, $\rm TOI-1601$, $\rm TOI-1736$, $\rm TOI-1842$, $\rm TOI-2145$). We also report the discovery of an outer, non-transiting planet, $\rm TOI-1294\,c$ ($P=160.1\pm2.5$ days, $M_{\mathrm{p}}=148.3^{+18.2}_{-16.4} \,M_{\oplus}$), and three additional stars with long-term RV trends. We find that at least $19\pm8\%$ of subgiants in our sample of $21$ stars have outer companions, comparable to main-sequence stars. We perform a homogeneous analysis of the stars and planets in the sample, with median uncertainties of $3\%$, $8\%$ and $15\%$ for planet radii, masses and ages, doubling the number of known planets orbiting subgiant stars with bulk densities measured to better than $10\%$. We observe a dearth of giant planets around evolved stars with short orbital periods, consistent with tidal dissipation theories that predict the rapid inspiral of planets as their host stars leave the main sequence. We note the possible evidence for two distinct classes of hot Jupiter populations, indicating multiple formation channels to explain the observed distributions around evolved stars. Finally, continued RV monitoring of planets in this sample will provide a more comprehensive understanding of demographics for evolved planetary systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_07893 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The TESS-Keck Survey XXI: 13 New Planets and Homogeneous Properties for 21 Subgiant Systems Chontos, Ashley Huber, Daniel Grunblatt, Samuel K. Saunders, Nicholas Winn, Joshua N. McCormack, Mason Knudstrup, Emil Albrecht, Simon H. Crossfield, Ian J. M. Rodriguez, Joseph E. Ciardi, David R. Collins, Karen A. Jenkins, Jon M. Bieryla, Allyson Batalha, Natalie M. Beard, Corey Dai, Fei Dalba, Paul A. Fetherolf, Tara Giacalone, Steven Hill, Michelle L. Howard, Andrew W. Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Močnik, Teo Murphy, Joseph M. Akana Petigura, Erik A. Pidhorodetska, Daria Polanski, Alex S. Robertson, Paul Rubenzahl, Ryan A. Turtelboom, Emma V. Weiss, Lauren M. Van Zandt, Judah Rocker, George R. Vanderspek, Roland Latham, David W. Seager, Sara Quinn, Samuel N. Shporer, Avi Eisner, Nora L. Goeke, Robert F. Levine, Alan M. Ting, Eric B. Howell, Steve Schlieder, Joshua E. Benni, Paul Boyle, Andrew W. Gan, Tianjun Girardin, Eric Gonzalez, Erica Gregorio, Joao Horne, Keith Livingston, John Lund, Michael B. Mann, Christopher R. Massey, Bob Matthews, Elisabeth C. McLeod, Kim K. Palle, Enric Popowicz, Adam Relles, Howard M. Schwarz, Richard P. Sefako, Ramotholo Srdoc, Grego Tan, Thiam-Guan Wang, Gavin Ziegler, Carl Earth and Planetary Astrophysics Solar and Stellar Astrophysics We present a dedicated transit and radial velocity survey of planets orbiting subgiant stars observed by the TESS Mission. Using $\sim$$16$ nights on Keck/HIRES, we confirm and characterize $12$ new transiting planets -- $\rm TOI-329\,b$, $\rm HD\,39688\,b$ ($\rm TOI-480$), $\rm TOI-603\,b$, $\rm TOI-1199\,b$, $\rm TOI-1294\,b$, $\rm TOI-1439\,b$, $\rm TOI-1605\,b$, $\rm TOI-1828\,b$, $\rm HD\,148193\,b$ ($\rm TOI-1836$), $\rm TOI-1885\,b$, $\rm HD\,83342\,b$ ($\rm TOI-1898$), $\rm TOI-2019\,b$ -- and provide updated properties for 9 previously confirmed TESS subgiant systems ($\rm TOI-197$, $\rm TOI-954$, $\rm TOI-1181$, $\rm TOI-1296$, $\rm TOI-1298$, $\rm TOI-1601$, $\rm TOI-1736$, $\rm TOI-1842$, $\rm TOI-2145$). We also report the discovery of an outer, non-transiting planet, $\rm TOI-1294\,c$ ($P=160.1\pm2.5$ days, $M_{\mathrm{p}}=148.3^{+18.2}_{-16.4} \,M_{\oplus}$), and three additional stars with long-term RV trends. We find that at least $19\pm8\%$ of subgiants in our sample of $21$ stars have outer companions, comparable to main-sequence stars. We perform a homogeneous analysis of the stars and planets in the sample, with median uncertainties of $3\%$, $8\%$ and $15\%$ for planet radii, masses and ages, doubling the number of known planets orbiting subgiant stars with bulk densities measured to better than $10\%$. We observe a dearth of giant planets around evolved stars with short orbital periods, consistent with tidal dissipation theories that predict the rapid inspiral of planets as their host stars leave the main sequence. We note the possible evidence for two distinct classes of hot Jupiter populations, indicating multiple formation channels to explain the observed distributions around evolved stars. Finally, continued RV monitoring of planets in this sample will provide a more comprehensive understanding of demographics for evolved planetary systems. |
| title | The TESS-Keck Survey XXI: 13 New Planets and Homogeneous Properties for 21 Subgiant Systems |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2402.07893 |