The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI-1246
(2022) In Astronomical Journal 163(6).- Abstract
Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 ± 0.06 R , 2.47 ± 0.08 R , 3.46 ± 0.09 R , and 3.72 ± 0.16 R ) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 ± 1.1 M , 8.8 ± 1.2 M , 5.3 ± 1.7 M , and 14.8 ± 2.3 M ). The two outer planets,... (More)
Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 ± 0.06 R , 2.47 ± 0.08 R , 3.46 ± 0.09 R , and 3.72 ± 0.16 R ) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 ± 1.1 M , 8.8 ± 1.2 M , 5.3 ± 1.7 M , and 14.8 ± 2.3 M ). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance (P e/P d = 2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70 ± 0.24 to 3.21 ± 0.44 g cm-3, implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 ± 3.6 M . This planet candidate is exterior to TOI-1246 e, with a candidate period of 93.8 days, and we discuss the implications if it is confirmed to be planetary in nature.
(Less)
- author
- publishing date
- 2022-06-01
- type
- Contribution to journal
- publication status
- published
- in
- Astronomical Journal
- volume
- 163
- issue
- 6
- article number
- 293
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85131569988
- ISSN
- 0004-6256
- DOI
- 10.3847/1538-3881/ac69e5
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2022. The Author(s). Published by the American Astronomical Society.
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- 0ba2218b-3375-4cb9-9c8c-c7516d3c878d
- date added to LUP
- 2023-02-01 09:20:41
- date last changed
- 2023-02-21 09:36:09
@article{0ba2218b-3375-4cb9-9c8c-c7516d3c878d,
abstract = {{<p>Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 ± 0.06 R , 2.47 ± 0.08 R , 3.46 ± 0.09 R , and 3.72 ± 0.16 R ) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 ± 1.1 M , 8.8 ± 1.2 M , 5.3 ± 1.7 M , and 14.8 ± 2.3 M ). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance (P e/P d = 2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70 ± 0.24 to 3.21 ± 0.44 g cm-3, implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 ± 3.6 M . This planet candidate is exterior to TOI-1246 e, with a candidate period of 93.8 days, and we discuss the implications if it is confirmed to be planetary in nature.</p>}},
author = {{Turtelboom, Emma V. and Weiss, Lauren M. and Dressing, Courtney D. and Nowak, Grzegorz and Palle, Enric and Beard, Corey and Blunt, Sarah and Brinkman, Casey and Chontos, Ashley and Claytor, Zachary R. and Dai, Fei and Dalba, Paul A. and Giacalone, Steven and Gonzales, Erica and Harada, Caleb K. and Hill, Michelle L. and Holcomb, Rae and Korth, Judith and Lubin, Jack and Masseron, Thomas and Macdougall, Mason and Mayo, Andrew W. and Močnik, Teo and Akana Murphy, Joseph M. and Polanski, Alex S. and Rice, Malena and Rubenzahl, Ryan A. and Scarsdale, Nicholas and Stassun, Keivan G. and Tyler, Dakotah B. and Zandt, Judah Van and Crossfield, Ian J.M. and Deeg, Hans J. and Fulton, Benjamin and Gandolfi, Davide and Howard, Andrew W. and Huber, Dan and Isaacson, Howard and Kane, Stephen R. and Lam, Kristine W.F. and Luque, Rafael and Martin, Eduardo L. and Morello, Giuseppe and Orell-Miquel, Jaume and Petigura, Erik A. and Robertson, Paul and Roy, Arpita and Van Eylen, Vincent and Baker, David and Belinski, Alexander A. and Bieryla, Allyson and Ciardi, David R. and Collins, Karen A. and Cutting, Neil and Della-Rose, Devin J. and Ellingsen, Taylor B. and Furlan, E. and Gan, Tianjun and Gnilka, Crystal L. and Guerra, Pere and Howell, Steve B. and Jimenez, Mary and Latham, David W. and Larivière, Maude and Lester, Kathryn V. and Lillo-Box, Jorge and Luker, Lindy and Mann, Christopher R. and Plavchan, Peter P. and Safonov, Boris and Skinner, Brett and Strakhov, Ivan A. and Wittrock, Justin M. and Caldwell, Douglas A. and Essack, Zahra and Jenkins, Jon M. and Quintana, Elisa V. and Ricker, George R. and Vanderspek, Roland and Seager, S. and Winn, Joshua N.}},
issn = {{0004-6256}},
language = {{eng}},
month = {{06}},
number = {{6}},
publisher = {{IOP Publishing}},
series = {{Astronomical Journal}},
title = {{The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI-1246}},
url = {{http://dx.doi.org/10.3847/1538-3881/ac69e5}},
doi = {{10.3847/1538-3881/ac69e5}},
volume = {{163}},
year = {{2022}},
}