The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c

Fei Dai; Arpita Roy; Benjamin Fulton; Paul Robertson; Lea Hirsch; Howard Isaacson; Simon Albrecht; Andrew W. Mann; Martti H. Kristiansen; Natalie M. Batalha; Corey Beard; Aida Behmard; Ashley Chontos; Ian J.M. Crossfield; Paul A. Dalba; Courtney Dressing; Steven Giacalone; Michelle Hill; Andrew W. Howard; Daniel Huber; Stephen R. Kane; Molly Kosiarek; Jack Lubin; Andrew Mayo; Teo Mocnik; Joseph M. Akana Murphy; Erik A. Petigura; Lee Rosenthal; Ryan A. Rubenzahl; Nicholas Scarsdale; Lauren M. Weiss; Judah van Zandt; George R. Ricker; Roland Vanderspek; David W. Latham; Sara Seager; Joshua N. Winn; Jon M. Jenkins; Douglas A. Caldwell; David Charbonneau; Tansu Daylan; Maximilian N. Günther; Edward Morgan; Samuel N. Quinn; Mark E. Rose; Jeffrey C. Smith

doi:10.3847/1538-3881/abb3bd

The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c

Fei Dai, Arpita Roy, Benjamin Fulton, Paul Robertson, Lea Hirsch, Howard Isaacson, Simon Albrecht, Andrew W. Mann, Martti H. Kristiansen, Natalie M. Batalha, Corey Beard, Aida Behmard, Ashley Chontos, Ian J.M. Crossfield, Paul A. Dalba, Courtney Dressing, Steven Giacalone, Michelle Hill, Andrew W. Howard, Daniel HuberStephen R. Kane, Molly Kosiarek, Jack Lubin, Andrew Mayo, Teo Mocnik, Joseph M. Akana Murphy, Erik A. Petigura, Lee Rosenthal, Ryan A. Rubenzahl, Nicholas Scarsdale, Lauren M. Weiss, Judah van Zandt, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Douglas A. Caldwell, David Charbonneau, Tansu Daylan, Maximilian N. Günther, Edward Morgan, Samuel N. Quinn, Mark E. Rose, Jeffrey C. Smith

Astrophysical Sciences

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Abstract

We report the measurement of a spectroscopic transit of TOI-1726c, one of two planets transiting a G-type star with V = 6.9 in the Ursa Major Moving Group (∼400 Myr). With a precise age constraint from cluster membership, TOI-1726 provides a great opportunity to test various obliquity excitation scenarios that operate on different timescales. By modeling the Rossiter-McLaughlin (RM) effect, we derived a sky-projected obliquity of -1_-⁺₃₂^35∘. This result rules out a polar/retrograde orbit and is consistent with an aligned orbit for planet c. Considering the previously reported, similarly prograde RM measurement of planet b and the transiting nature of both planets, TOI-1726 tentatively conforms to the overall picture that compact multitransiting planetary systems tend to have coplanar, likely aligned orbits. TOI-1726 is also a great atmospheric target for understanding differential atmospheric loss of sub-Neptune planets (planet b 2.2 R☉ and c 2.7 R☉ both likely underwent photoevaporation). The coplanar geometry points to a dynamically cold history of the system that simplifies any future modeling of atmospheric escape.

Original language	English (US)
Article number	abb3bd
Journal	Astronomical Journal
Volume	160
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/abb3bd
State	Published - Oct 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Dai, F., Roy, A., Fulton, B., Robertson, P., Hirsch, L., Isaacson, H., Albrecht, S., Mann, A. W., Kristiansen, M. H., Batalha, N. M., Beard, C., Behmard, A., Chontos, A., Crossfield, I. J. M., Dalba, P. A., Dressing, C., Giacalone, S., Hill, M., Howard, A. W., ... Smith, J. C. (2020). The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c. Astronomical Journal, 160(4), Article abb3bd. https://doi.org/10.3847/1538-3881/abb3bd

@article{e10c3960107b4d4e88a8317736d21be1,

title = "The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c",

abstract = "We report the measurement of a spectroscopic transit of TOI-1726c, one of two planets transiting a G-type star with V = 6.9 in the Ursa Major Moving Group (∼400 Myr). With a precise age constraint from cluster membership, TOI-1726 provides a great opportunity to test various obliquity excitation scenarios that operate on different timescales. By modeling the Rossiter-McLaughlin (RM) effect, we derived a sky-projected obliquity of -1-+3235∘. This result rules out a polar/retrograde orbit and is consistent with an aligned orbit for planet c. Considering the previously reported, similarly prograde RM measurement of planet b and the transiting nature of both planets, TOI-1726 tentatively conforms to the overall picture that compact multitransiting planetary systems tend to have coplanar, likely aligned orbits. TOI-1726 is also a great atmospheric target for understanding differential atmospheric loss of sub-Neptune planets (planet b 2.2 R☉ and c 2.7 R☉ both likely underwent photoevaporation). The coplanar geometry points to a dynamically cold history of the system that simplifies any future modeling of atmospheric escape.",

author = "Fei Dai and Arpita Roy and Benjamin Fulton and Paul Robertson and Lea Hirsch and Howard Isaacson and Simon Albrecht and Mann, {Andrew W.} and Kristiansen, {Martti H.} and Batalha, {Natalie M.} and Corey Beard and Aida Behmard and Ashley Chontos and Crossfield, {Ian J.M.} and Dalba, {Paul A.} and Courtney Dressing and Steven Giacalone and Michelle Hill and Howard, {Andrew W.} and Daniel Huber and Kane, {Stephen R.} and Molly Kosiarek and Jack Lubin and Andrew Mayo and Teo Mocnik and {Akana Murphy}, {Joseph M.} and Petigura, {Erik A.} and Lee Rosenthal and Rubenzahl, {Ryan A.} and Nicholas Scarsdale and Weiss, {Lauren M.} and {van Zandt}, Judah and Ricker, {George R.} and Roland Vanderspek and Latham, {David W.} and Sara Seager and Winn, {Joshua N.} and Jenkins, {Jon M.} and Caldwell, {Douglas A.} and David Charbonneau and Tansu Daylan and G{\"u}nther, {Maximilian N.} and Edward Morgan and Quinn, {Samuel N.} and Rose, {Mark E.} and Smith, {Jeffrey C.}",

year = "2020",

month = oct,

doi = "10.3847/1538-3881/abb3bd",

language = "English (US)",

volume = "160",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "4",

}

Dai, F, Roy, A, Fulton, B, Robertson, P, Hirsch, L, Isaacson, H, Albrecht, S, Mann, AW, Kristiansen, MH, Batalha, NM, Beard, C, Behmard, A, Chontos, A, Crossfield, IJM, Dalba, PA, Dressing, C, Giacalone, S, Hill, M, Howard, AW, Huber, D, Kane, SR, Kosiarek, M, Lubin, J, Mayo, A, Mocnik, T, Akana Murphy, JM, Petigura, EA, Rosenthal, L, Rubenzahl, RA, Scarsdale, N, Weiss, LM, van Zandt, J, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Jenkins, JM, Caldwell, DA, Charbonneau, D, Daylan, T, Günther, MN, Morgan, E, Quinn, SN, Rose, ME & Smith, JC 2020, 'The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c', Astronomical Journal, vol. 160, no. 4, abb3bd. https://doi.org/10.3847/1538-3881/abb3bd

TY - JOUR

T1 - The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c

AU - Dai, Fei

AU - Roy, Arpita

AU - Fulton, Benjamin

AU - Robertson, Paul

AU - Hirsch, Lea

AU - Isaacson, Howard

AU - Albrecht, Simon

AU - Mann, Andrew W.

AU - Kristiansen, Martti H.

AU - Batalha, Natalie M.

AU - Beard, Corey

AU - Behmard, Aida

AU - Chontos, Ashley

AU - Crossfield, Ian J.M.

AU - Dalba, Paul A.

AU - Dressing, Courtney

AU - Giacalone, Steven

AU - Hill, Michelle

AU - Howard, Andrew W.

AU - Huber, Daniel

AU - Kane, Stephen R.

AU - Kosiarek, Molly

AU - Lubin, Jack

AU - Mayo, Andrew

AU - Mocnik, Teo

AU - Akana Murphy, Joseph M.

AU - Petigura, Erik A.

AU - Rosenthal, Lee

AU - Rubenzahl, Ryan A.

AU - Scarsdale, Nicholas

AU - Weiss, Lauren M.

AU - van Zandt, Judah

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Latham, David W.

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Caldwell, Douglas A.

AU - Charbonneau, David

AU - Daylan, Tansu

AU - Günther, Maximilian N.

AU - Morgan, Edward

AU - Quinn, Samuel N.

AU - Rose, Mark E.

AU - Smith, Jeffrey C.

PY - 2020/10

Y1 - 2020/10

N2 - We report the measurement of a spectroscopic transit of TOI-1726c, one of two planets transiting a G-type star with V = 6.9 in the Ursa Major Moving Group (∼400 Myr). With a precise age constraint from cluster membership, TOI-1726 provides a great opportunity to test various obliquity excitation scenarios that operate on different timescales. By modeling the Rossiter-McLaughlin (RM) effect, we derived a sky-projected obliquity of -1-+3235∘. This result rules out a polar/retrograde orbit and is consistent with an aligned orbit for planet c. Considering the previously reported, similarly prograde RM measurement of planet b and the transiting nature of both planets, TOI-1726 tentatively conforms to the overall picture that compact multitransiting planetary systems tend to have coplanar, likely aligned orbits. TOI-1726 is also a great atmospheric target for understanding differential atmospheric loss of sub-Neptune planets (planet b 2.2 R☉ and c 2.7 R☉ both likely underwent photoevaporation). The coplanar geometry points to a dynamically cold history of the system that simplifies any future modeling of atmospheric escape.

AB - We report the measurement of a spectroscopic transit of TOI-1726c, one of two planets transiting a G-type star with V = 6.9 in the Ursa Major Moving Group (∼400 Myr). With a precise age constraint from cluster membership, TOI-1726 provides a great opportunity to test various obliquity excitation scenarios that operate on different timescales. By modeling the Rossiter-McLaughlin (RM) effect, we derived a sky-projected obliquity of -1-+3235∘. This result rules out a polar/retrograde orbit and is consistent with an aligned orbit for planet c. Considering the previously reported, similarly prograde RM measurement of planet b and the transiting nature of both planets, TOI-1726 tentatively conforms to the overall picture that compact multitransiting planetary systems tend to have coplanar, likely aligned orbits. TOI-1726 is also a great atmospheric target for understanding differential atmospheric loss of sub-Neptune planets (planet b 2.2 R☉ and c 2.7 R☉ both likely underwent photoevaporation). The coplanar geometry points to a dynamically cold history of the system that simplifies any future modeling of atmospheric escape.

UR - http://www.scopus.com/inward/record.url?scp=85092535841&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85092535841&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/abb3bd

DO - 10.3847/1538-3881/abb3bd

M3 - Article

AN - SCOPUS:85092535841

SN - 0004-6256

VL - 160

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - abb3bd

ER -

The TESS-keck survey. III. A stellar obliquity measurement of TOI-1726 c

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