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Title: Characterization of the Wolf 1061 Planetary System

Abstract

A critical component of exoplanetary studies is an exhaustive characterization of the host star, from which the planetary properties are frequently derived. Of particular value are the radius, temperature, and luminosity, which are key stellar parameters for studies of transit and habitability science. Here we present the results of new observations of Wolf 1061, known to host three super-Earths. Our observations from the Center for High Angular Resolution Astronomy interferometric array provide a direct stellar radius measurement of 0.3207±0.0088 R{sub ⊙}, from which we calculate the effective temperature and luminosity using spectral energy distribution models. We obtained 7 yr of precise, automated photometry that reveals the correct stellar rotation period of 89.3±1.8 days, finds no evidence of photometric transits, and confirms that the radial velocity signals are not due to stellar activity. Finally, our stellar properties are used to calculate the extent of the Habitable Zone (HZ) for the Wolf 1061 system, for which the optimistic boundaries are 0.09–0.23 au. Our simulations of the planetary orbital dynamics show that the eccentricity of the HZ planet oscillates to values as high as ∼0.15 as it exchanges angular momentum with the other planets in the system.

Authors:
;  [1];  [2];  [3];  [4];  [5]
  1. Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132 (United States)
  2. Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States)
  3. Center of Excellence in Information Systems, Tennessee State University, 3500 John A. Merritt Blvd., Box 9501, Nashville, TN 37209 (United States)
  4. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States)
  5. Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)
Publication Date:
OSTI Identifier:
22663905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 835; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANGULAR MOMENTUM; ASTRONOMY; ENERGY SPECTRA; HOST; LUMINOSITY; PHOTOMETRY; PLANETS; RADIAL VELOCITY; RESOLUTION; ROTATION; SIMULATION; STARS; STELLAR ACTIVITY

Citation Formats

Kane, Stephen R., Waters, Miranda A., Von Braun, Kaspar, Henry, Gregory W., Boyajian, Tabetha S., and Mann, Andrew W., E-mail: skane@sfsu.edu. Characterization of the Wolf 1061 Planetary System. United States: N. p., 2017. Web. doi:10.3847/1538-4357/835/2/200.
Kane, Stephen R., Waters, Miranda A., Von Braun, Kaspar, Henry, Gregory W., Boyajian, Tabetha S., & Mann, Andrew W., E-mail: skane@sfsu.edu. Characterization of the Wolf 1061 Planetary System. United States. doi:10.3847/1538-4357/835/2/200.
Kane, Stephen R., Waters, Miranda A., Von Braun, Kaspar, Henry, Gregory W., Boyajian, Tabetha S., and Mann, Andrew W., E-mail: skane@sfsu.edu. Wed . "Characterization of the Wolf 1061 Planetary System". United States. doi:10.3847/1538-4357/835/2/200.
@article{osti_22663905,
title = {Characterization of the Wolf 1061 Planetary System},
author = {Kane, Stephen R. and Waters, Miranda A. and Von Braun, Kaspar and Henry, Gregory W. and Boyajian, Tabetha S. and Mann, Andrew W., E-mail: skane@sfsu.edu},
abstractNote = {A critical component of exoplanetary studies is an exhaustive characterization of the host star, from which the planetary properties are frequently derived. Of particular value are the radius, temperature, and luminosity, which are key stellar parameters for studies of transit and habitability science. Here we present the results of new observations of Wolf 1061, known to host three super-Earths. Our observations from the Center for High Angular Resolution Astronomy interferometric array provide a direct stellar radius measurement of 0.3207±0.0088 R{sub ⊙}, from which we calculate the effective temperature and luminosity using spectral energy distribution models. We obtained 7 yr of precise, automated photometry that reveals the correct stellar rotation period of 89.3±1.8 days, finds no evidence of photometric transits, and confirms that the radial velocity signals are not due to stellar activity. Finally, our stellar properties are used to calculate the extent of the Habitable Zone (HZ) for the Wolf 1061 system, for which the optimistic boundaries are 0.09–0.23 au. Our simulations of the planetary orbital dynamics show that the eccentricity of the HZ planet oscillates to values as high as ∼0.15 as it exchanges angular momentum with the other planets in the system.},
doi = {10.3847/1538-4357/835/2/200},
journal = {Astrophysical Journal},
number = 2,
volume = 835,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}