The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
Article
Giovinazzi, Mark R., Blake, Cullen H., Robertson, Paul, Lin, Andrea S. J, Gupta, Arvind F., Mahadevan, Suvrath, Wright, Jason T., Bardalez Gagliuffi, Daniella, Dong, Jiayin, Fernandes, Rachel B., Fitzmaurice, Evan, Halverson, Samuel, Kanodia, Shubham, Logsdon, Sarah E., Luhn, Jacob K., McElwain, Michael W., Monson, Andy, Ninan, Joe P., Rajagopal, Jayadev, ..., Wittenmyer, Robert A. 2025. "The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems." The Astronomical Journal. 170 (1). https://doi.org/10.3847/1538-3881/add922
Article Title | The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Giovinazzi, Mark R., Blake, Cullen H., Robertson, Paul, Lin, Andrea S. J, Gupta, Arvind F., Mahadevan, Suvrath, Wright, Jason T., Bardalez Gagliuffi, Daniella, Dong, Jiayin, Fernandes, Rachel B., Fitzmaurice, Evan, Halverson, Samuel, Kanodia, Shubham, Logsdon, Sarah E., Luhn, Jacob K., McElwain, Michael W., Monson, Andy, Ninan, Joe P., Rajagopal, Jayadev, Roy, Arpita, Schwab, Christian, Stefánsson, Gudmundur, Terrien, Ryan, Eastman, Jason D., Horner, Jonathan, Plavchan, Peter, Wang, Sharon X., Wilson, Maurice L. and Wittenmyer, Robert A |
Journal Title | The Astronomical Journal |
Journal Citation | 170 (1) |
Article Number | 52 |
Number of Pages | 33 |
Year | 2025 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/add922 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/add922 |
Abstract | We present a set of companion dynamical masses and orbital parameters of seven star systems from the NEID Earth Twin Survey with significant absolute astrometric accelerations between the epochs of Hipparcos and Gaia. These include four binary star systems (HD 68017 AB, 61 Cygni AB, HD 24496 AB, and HD 4614 AB) and three planetary systems (HD 217107, HD 190360, and HD 154345). Our analyses incorporate a long baseline of RVs that includes over 1100 previously unpublished measurements from NEID and MINERVA, extending the overall RV baseline for each system by ≈2.5 yr, as well as relative astrometry for the stellar binary systems where the positions of both stars are well measured. In each case, the combination of astrometry and RVs constrains the three-dimensional acceleration of the host star and enables precise dynamical masses. We publish true masses for three planets whose measurements were previously entangled with their inclinations, four stellar masses with ≲1% relative precision, and improved orbital solutions for all seven systems, including the first for HD 24496 AB. These solutions not only agree with previous estimates, but also improve their fidelity. We also explore each system for evidence of periodic signals in the residuals around our best-fit models, and discuss the potential that the three planetary systems have for being directly imaged. With dynamical mass estimates and reliable orbit ephemerides, these seven star systems represent promising benchmarks for future stellar and planetary characterization efforts, and are amenable for further improvement with the upcoming release of Gaia epoch astrometry. |
Keywords | Binary stars; Exoplanet astronomy ; Radial velocity; Astrometry |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | University of Pennsylvania, United States |
Amherst College, United States | |
University of California Irvine, United States | |
Pennsylvania State University, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
Flatiron Institute, United States | |
University of Illinois Urbana-Champaign, United States | |
California Institute of Technology (Caltech), United States | |
Carnegie Earth and Planets Laboratory, United States | |
NASA Jet Propulsion Laboratory, United States | |
NASA Goddard Space Flight Center, United States | |
University of Arizona, United States | |
Tata Institute of Fundamental Research, India | |
Astrophysics & Space Institute, United States | |
Macquarie University | |
University of Amsterdam, Netherlands | |
Carleton College, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Centre for Astrophysics | |
George Mason University, United States | |
Tsinghua University, China | |
National Center for Atmospheric Research, United States |
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