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NEID Rossiter-McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star

Dong, Jiayin and Huang, Chelsea X. and Zhou, George and Dawson, Rebekah I. and Stefánsson, Gumundur K. and Bender, Chad F. and Blake, Cullen H. and Ford, Eric B. and Halverson, Samuel and Kanodia, Shubham and Mahadevan, Suvrath and McElwain, Michael W. and Ninan, Joe P. and Robertson, Paul and Roy, Arpita and Schwab, Christian and Stevens, Daniel J. and Terrien, Ryan C. and Vanderburg, Andrew and Kraus, Adam L. and Douglas, Stephanie and Newton, Elisabeth and Rampalli, Rayna and Krolikowski, Daniel M. and Collins, Karen A. and Rodriguez, Joseph E. and Feliz, Dax L. and Srdoc, Gregor and Ziegler, Carl and Barkaoui, Khalid and Pozuelos, Francisco J. and Jehin, Emmanuel and Michaël, C. and Benkhaldoun, Zouhair and Lewin, Pablo and Forés-Toribio, Raquel and Muñoz, Jose A. and McLeod, Kim K. and Powers Özyurt, Fiona and Horta, Ferran Grau and Murgas, Felipe and Latham, David W. and Quinn, Samuel N. and Bieryla, Allyson and Howell, Steve B. and Gnilka, Crystal L. and Ciardi, David R. and Lund, Michael B. and Dressing, Courtney D. and Giacalone, Steven and Savel, Arjun B. and Strakhov, Ivan A. and Belinski, Alexander A. and Ricker, George R. and Seager, S. and Winn, Joshua N. and Jenkins, Jon M. and Torres, Guillermo and Paegert, Martin (2022) NEID Rossiter-McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star. Astrophysical Journal Letters, 926 (2). Art. No. L7. ISSN 2041-8205. doi:10.3847/2041-8213/ac4da0.

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Close-in gas giants present a surprising range of stellar obliquity, the angle between a planet’s orbital axis and its host star’s spin axis. It is unclear whether the obliquities reflect the planets’ dynamical history (e.g., aligned for in situ formation or disk migration versus misaligned for high-eccentricity tidal migration) or whether other mechanisms (e.g., primordial misalignment or planet–star interactions) are more important in sculpting the obliquity distribution. Here we present the stellar obliquity measurement of TOI-1268 (TIC-142394656, V_(mag) ∼ 10.9), a young K-type dwarf hosting an 8.2 day period, Saturn-sized planet. TOI-1268’s lithium abundance and rotation period suggest the system age between the ages of the Pleiades cluster (∼120 Myr) and the Prasepe cluster (∼670 Myr). Using the newly commissioned NEID spectrograph, we constrain the stellar obliquity of TOI-1268 via the Rossiter–McLaughlin effect from both radial velocity and Doppler tomography signals. The 3σ upper bounds of the projected stellar obliquity ∣λ∣ from both models are below 60°. The large host star separation (a/R ⋆ ∼ 17), combined with the system’s young age, makes it unlikely that the planet has realigned its host star. The stellar obliquity measurement of TOI-1268 probes the architecture of a young gas giant beyond the reach of tidal realignment (a/R ⋆ ≳ 10) and reveals an aligned or slightly misaligned system.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Dong, Jiayin0000-0002-3610-6953
Huang, Chelsea X.0000-0003-0918-7484
Zhou, George0000-0002-4891-3517
Dawson, Rebekah I.0000-0001-9677-1296
Stefánsson, Gumundur K.0000-0001-7409-5688
Bender, Chad F.0000-0003-4384-7220
Blake, Cullen H.0000-0002-6096-1749
Ford, Eric B.0000-0001-6545-639X
Halverson, Samuel0000-0003-1312-9391
Kanodia, Shubham0000-0001-8401-4300
Mahadevan, Suvrath0000-0001-9596-7983
McElwain, Michael W.0000-0003-0241-8956
Ninan, Joe P.0000-0001-8720-5612
Robertson, Paul0000-0003-0149-9678
Roy, Arpita0000-0001-8127-5775
Schwab, Christian0000-0002-0091-7105
Stevens, Daniel J.0000-0002-5951-8328
Terrien, Ryan C.0000-0002-4788-8858
Vanderburg, Andrew0000-0001-7246-5438
Kraus, Adam L.0000-0001-9811-568X
Douglas, Stephanie0000-0001-7371-2832
Newton, Elisabeth0000-0003-4150-841X
Rampalli, Rayna0000-0001-7337-5936
Krolikowski, Daniel M.0000-0001-9626-0613
Collins, Karen A.0000-0001-6588-9574
Rodriguez, Joseph E.0000-0001-8812-0565
Feliz, Dax L.0000-0002-2457-7889
Ziegler, Carl0000-0002-0619-7639
Barkaoui, Khalid0000-0003-1464-9276
Pozuelos, Francisco J.0000-0003-1572-7707
Jehin, Emmanuel0000-0001-8923-488X
Michaël, C.0000-0003-1462-7739
Benkhaldoun, Zouhair0000-0001-6285-9847
Lewin, Pablo0000-0003-0828-6368
Forés-Toribio, Raquel0000-0002-6482-2180
Muñoz, Jose A.0000-0001-9833-2959
McLeod, Kim K.0000-0001-9504-1486
Powers Özyurt, Fiona0000-0002-1155-977X
Horta, Ferran Grau0000-0001-9927-7269
Murgas, Felipe0000-0001-9087-1245
Latham, David W.0000-0001-9911-7388
Quinn, Samuel N.0000-0002-8964-8377
Bieryla, Allyson0000-0001-6637-5401
Howell, Steve B.0000-0002-2532-2853
Gnilka, Crystal L.0000-0003-2519-6161
Ciardi, David R.0000-0002-5741-3047
Lund, Michael B.0000-0003-2527-1598
Dressing, Courtney D.0000-0001-8189-0233
Giacalone, Steven0000-0002-8965-3969
Savel, Arjun B.0000-0002-2454-768X
Strakhov, Ivan A.0000-0003-0647-6133
Belinski, Alexander A.0000-0003-3469-0989
Ricker, George R.0000-0003-2058-6662
Seager, S.0000-0002-6892-6948
Winn, Joshua N.0000-0002-4265-047X
Jenkins, Jon M.0000-0002-4715-9460
Torres, Guillermo0000-0002-5286-0251
Paegert, Martin0000-0001-8120-7457
Alternate Title:NEID Rossiter–McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star
Additional Information:© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 December 10; revised 2022 January 19; accepted 2022 January 20; published 2022 February 16. Computations for this research were performed on the Pennsylvania State University's Institute for Computational & Data Sciences Advanced CyberInfrastructure (ICS-ACI). This content is solely the responsibility of the authors and does not necessarily represent the views of the Institute for CyberScience. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University and the Eberly College of Science. We gratefully acknowledge support by NASA XRP 80NSSC18K0355 and NASA TESS GO 80NSSC18K1695. These results are based on observations obtained with NEID on the WIYN 3.5 m Telescope at Kitt Peak National Observatory. WIYN is a joint facility of the University of Wisconsin–Madison, Indiana University, NSF's NOIRLab, the Pennsylvania State University, Purdue University, University of California, Irvine, and the University of Missouri. The authors are honored to be permitted to conduct astronomical research on Iolkam Du'ag (Kitt Peak), a mountain with particular significance to the Tohono O'odham. This work makes use of observations from the LCOGT network. This work was performed for the Jet Propulsion Laboratory, California Institute of Technology, sponsored by the United States Government under the Prime Contract 80NM0018D0004 between Caltech and NASA. The research leading to these results has received funding from the ARC grant for Concerted Research Actions, financed by the Wallonia-Brussels Federation. TRAPPIST is funded by the Belgian Fund for Scientific Research (Fond National de la Recherche Scientifique, FNRS) under the grant PDR T.0120.21, with the participation of the Swiss National Science Foundation (SNF). TRAPPIST-North is a project funded by the University of Liege (Belgium), in collaboration with Cadi Ayyad University of Marrakech (Morocco). M.G. and E.J. are F.R.S.-FNRS Senior Research Associates. C.D.D. acknowledges support from the NASA Exoplanet Research Program (XRP) under award 80NSSC20K0250. A.A.B. and I.A.S. acknowledge the support of Ministry of Science and Higher Education of the Russian Federation under the grant 075-15-2020-780 (N13.1902.21.0039). We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This research made use of exoplanet (Foreman-Mackey et al. 2019, 2021) and its dependencies (Astropy Collaboration et al. 2013; Kipping 2013; Salvatier et al. 2016; Theano Development Team 2016; Foreman-Mackey et al. 2017; Foreman-Mackey 2018; Astropy Collaboration et al. 2018; Foreman-Mackey et al. 2019; Luger et al. 2019; Agol et al. 2020). Some/all of the data presented in this Letter were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed can be accessed via doi:10.17909/t9-nmc8-f686. Facilities: TESS - , Gaia - , LCOGT - , TRAPPIST-North - , PHARON - , `Alopeke - , ShARCS - , KELT - , TRES - , NEID - , Exoplanet Archive - Software: ArviZ (Kumar et al. 2019), astroARIADNE, AstroImageJ (Collins et al. 2017), astropy (Astropy Collaboration et al. 2013, 2018), BAFFLES (Stanford-Moore et al. 2020), celerite2 (Foreman-Mackey et al. 2017; Foreman-Mackey 2018), Comove (Tofflemire et al. 2021), EXOFASTv2 (Eastman et al. 2013, 2019), exoplanet (Foreman-Mackey et al. 2021), Jupyter (Kluyver et al. 2016), Matplotlib (Hunter 2007; Droettboom et al. 2016), NumPy (van der Walt et al. 2011; Harris et al. 2020), pandas (McKinney 2010), PyMC (Salvatier et al. 2016), SciPy (Virtanen et al. 2020), starry (Luger et al. 2019), Tapir (Jensen 2013), VARTOOLS (Hartman & Bakos 2016).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Center for Exoplanets and Habitable WorldsUNSPECIFIED
Pennsylvania State UniversityUNSPECIFIED
Eberly College of ScienceUNSPECIFIED
Wallonia-Brussels FederationUNSPECIFIED
Fond National de la Recherche Scientifique (FNRS)PDR T.0120.21
Swiss National Science Foundation (SNSF)UNSPECIFIED
University of LiegeUNSPECIFIED
Cadi Ayyad University of MarrakechUNSPECIFIED
Ministry of Science and Higher Education of the Russian Federation075-15-2020-780
Ministry of Science and Higher Education of the Russian FederationN13.1902.21.0039
Subject Keywords:Extrasolar gaseous giant planets; Radial velocity; Transit photometry; Stellar activity; Exoplanet dynamics
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Extrasolar gaseous giant planets (509); Radial velocity (1332); Transit photometry (1709); Stellar activity (1580); Exoplanet dynamics (490)
Record Number:CaltechAUTHORS:20220217-686950000
Persistent URL:
Official Citation:Jiayin Dong et al 2022 ApJL 926 L7
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113490
Deposited By: George Porter
Deposited On:17 Feb 2022 21:21
Last Modified:17 Feb 2022 21:21

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