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The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a nearby Warm Jupiter Companion, from NEID and HIRES

Wang, Xian-Yu and Rice, Malena and Wang, Songhu and Pu, Bonan and Stefánsson, Guðmundur and Mahadevan, Suvrath and Giacalone, Steven and Wu, Zhen-Yu and Esposito, Thomas M. and Dalba, Paul A. and Avsar, Arin and Holden, Bradford and Skiff, Brian and Polakis, Tom and Voeller, Kevin and Logsdon, Sarah E. and Klusmeyer, Jessica and Schweiker, Heidi and Wu, Dong-Hong and Beard, Corey and Dai, Fei and Lubin, Jack and Weiss, Lauren M. and Bender, Chad F. and Blake, Cullen H. and Dressing, Courtney D. and Halverson, Samuel and Hearty, Fred and Howard, Andrew W. and Huber, Daniel and Isaacson, Howard and Jackman, James A. G. and Llama, Joe and McElwain, Michael W. and Rajagopal, Jayadev and Roy, Arpita and Robertson, Paul and Schwab, Christian and Shkolnik, Evgenya L. and Wright, Jason T. and Laughlin, Gregory (2022) The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a nearby Warm Jupiter Companion, from NEID and HIRES. Astrophysical Journal Letters, 926 (2). Art. No. L8. ISSN 2041-8205. doi:10.3847/2041-8213/ac4f44.

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We present spectroscopic measurements of the Rossiter–McLaughlin effect for WASP-148b, the only known hot Jupiter with a nearby warm-Jupiter companion, from the WIYN/NEID and Keck/HIRES instruments. This is one of the first scientific results reported from the newly commissioned NEID spectrograph, as well as the second obliquity constraint for a hot Jupiter system with a close-in companion, after WASP-47. WASP-148b is consistent with being in alignment with the sky-projected spin axis of the host star, with λ = -8°.2 ^(+8°.7)_(-9°.7). The low obliquity observed in the WASP-148 system is consistent with the orderly-alignment configuration of most compact multi-planet systems around cool stars with obliquity constraints, including our solar system, and may point to an early history for these well-organized systems in which migration and accretion occurred in isolation, with relatively little disturbance. By contrast, previous results have indicated that high-mass and hot stars appear to more commonly host a wide range of misaligned planets: not only single hot Jupiters, but also compact systems with multiple super-Earths. We suggest that, to account for the high rate of spin–orbit misalignments in both compact multi-planet and isolated-hot-Jupiter systems orbiting high-mass and hot stars, spin–orbit misalignments may be caused by distant giant planet perturbers, which are most common around these stellar types.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wang, Xian-Yu0000-0002-0376-6365
Rice, Malena0000-0002-7670-670X
Wang, Songhu0000-0002-7846-6981
Pu, Bonan0000-0002-5668-243X
Stefánsson, Guðmundur0000-0001-7409-5688
Mahadevan, Suvrath0000-0001-9596-7983
Giacalone, Steven0000-0002-8965-3969
Wu, Zhen-Yu0000-0001-8037-1984
Esposito, Thomas M.0000-0002-0792-3719
Dalba, Paul A.0000-0002-4297-5506
Avsar, Arin0000-0001-7801-7425
Holden, Bradford0000-0002-6153-3076
Polakis, Tom0000-0003-0628-7017
Logsdon, Sarah E.0000-0002-9632-9382
Klusmeyer, Jessica0000-0003-3906-9518
Schweiker, Heidi0000-0001-9580-4869
Wu, Dong-Hong0000-0001-9424-3721
Beard, Corey0000-0001-7708-2364
Dai, Fei0000-0002-8958-0683
Lubin, Jack0000-0001-8342-7736
Weiss, Lauren M.0000-0002-3725-3058
Bender, Chad F.0000-0003-4384-7220
Blake, Cullen H.0000-0002-6096-1749
Dressing, Courtney D.0000-0001-8189-0233
Halverson, Samuel0000-0003-1312-9391
Hearty, Fred0000-0002-1664-3102
Howard, Andrew W.0000-0001-8638-0320
Huber, Daniel0000-0001-8832-4488
Isaacson, Howard0000-0002-0531-1073
Jackman, James A. G.0000-0003-0711-7992
Llama, Joe0000-0003-4450-0368
McElwain, Michael W.0000-0003-0241-8956
Rajagopal, Jayadev0000-0002-2488-7123
Roy, Arpita0000-0001-8127-5775
Robertson, Paul0000-0003-0149-9678
Schwab, Christian0000-0002-4046-987X
Shkolnik, Evgenya L.0000-0002-7260-5821
Wright, Jason T.0000-0001-6160-5888
Laughlin, Gregory0000-0002-3253-2621
Alternate Title:SOLES II: The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a Nearby Warm Jupiter Companion, from NEID and HIRES
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 October 17; revised 2022 January 18; accepted 2022 January 18; published 2022 February 16. We thank the anonymous reviewer for insightful and constructive suggestions that greatly strengthened the scientific content of this paper. M.R. is supported by the National Science Foundation Graduate Research Fellowship Program under grant No. DGE-1752134. J.A.G.J. acknowledges support from grant HST-GO-15955.004-A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. P.D. is supported by a National Science Foundation (NSF) Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1903811. This work was partially supported by funding from the Center for Exoplanets and Habitable Worlds. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. This paper contains data taken with the NEID instrument, which was funded by the NASA-NSF Exoplanet Observational Research (NN-EXPLORE) partnership and built by Pennsylvania State University. NEID is installed on the WIYN telescope, which is operated by the NSF's National Optical-Infrared Astronomy Research Laboratory, and the NEID archive is operated by the NASA Exoplanet Science Institute at the California Institute of Technology. NN-EXPLORE is managed by the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Aeronautics and Space Administration. This work was performed, in part, 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 Center for Exoplanets and Habitable Worlds and the Penn State Extraterrestrial Intelligence Center are supported by the Pennsylvania State University and the Eberly College of Science. This work is supported by Astronomical Big Data Joint Research Center, co-founded by National Astronomical Observatories, Chinese Academy of Sciences and Alibaba Cloud.
Group:Astronomy Department
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1752134
NASANAS 5-26555
NSF Astronomy and Astrophysics FellowshipAST-1903811
Center for Exoplanets and Habitable WorldsUNSPECIFIED
Pennsylvania State UniversityUNSPECIFIED
Eberly College of ScienceUNSPECIFIED
Pennsylvania Space Grant ConsortiumUNSPECIFIED
Astronomical Big Data Joint Research CenterUNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC)UNSPECIFIED
Subject Keywords:Planetary alignment; Exoplanet dynamics; Star-planet interactions; Exoplanets; Planetary theory; Exoplanet systems
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Planetary alignment (1243); Exoplanet dynamics (490); Star-planet interactions (2177); Exoplanets (498); Planetary theory (1258); Exoplanet systems (484)
Record Number:CaltechAUTHORS:20211130-215726378
Persistent URL:
Official Citation:Xian-Yu Wang et al 2022 ApJL 926 L8
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112107
Deposited By: George Porter
Deposited On:01 Dec 2021 20:12
Last Modified:22 Mar 2022 17:38

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