The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Evidence for a Long-Period Planet Orbiting ε Eridani
Open accessAbstract
High-precision radial velocity (RV) measurements spanning the years 1980.8-2000.0 are presented for the nearby (3.22 pc) K2 V star Eri. These data, which represent a combination of six independent data sets taken with four different telescopes, show convincing variations with a period of ≈7 yr. A least-squares orbital solution using robust estimation yields orbital parameters of period P = 6.9 yr, velocity amplitude K = 19 m s -1 , eccentricity e = 0.6, projected companion mass M sin i = 0.86 M Jupiter , and semimajor axis a 2 = 3.4 AU. Ca II H and K S -index measurements spanning the same time interval show significant variations with periods of 3 and 20 yr yet none at the RV period. If magnetic activity were responsible for the RV variations, then it produces a significantly different period than is seen in the Ca II data. Given the lack of Ca II variation with the same period as that found in the RV measurements, the long-lived and coherent nature of these variations, and the high eccentricity of the implied orbit, Keplerian motion due to a planetary companion seems to be the most likely explanation for the observed RV variations. The wide angular separation of the planet from the star (approximately 1'') and the long orbital period make this planet a prime candidate for both direct imaging and space-based astrometric measurements.
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Cites
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Self-citationChromospheric variations in main-sequence stars
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Self-citationThe Discovery of a Planetary Companion to 16 Cygni B
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Self-citationActivity‐Related Radial Velocity Variation in Cool Stars
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Self-citationAlbedo and Reflection Spectra of Extrasolar Giant Planets
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Cited by
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Rosenthal, L. J., Fulton, B. J., Hirsch, L. A., Isaacson, H. T., Howard, A. W., Dedrick, C. M., Sherstyuk, I. A., Blunt, S. C., Petigura, E. A., Knutson, H. A., et al. (2021) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/abe23c · Cited by 341
Self-citationDebris Disks around Sun‐like Stars
Trilling, D. E., Bryden, G., Beichman, C. A., Rieke, G. H., Su, K. Y. L., Stansberry, J. A., Blaylock, M., Stapelfeldt, K. R., Beeman, J. W., & Haller, E. E. (2008) · The Astrophysical Journal · doi:10.1086/525514 · Cited by 295
Detection Limits from the McDonald Observatory Planet Search Program
Wittenmyer, R. A., Endl, M., Cochran, W. D., Hatzes, A. P., Walker, G. A. H., Yang, S. L. S., & Paulson, D. B. (2006) · The Astronomical Journal · doi:10.1086/504942 · Cited by 287
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Metadata
- Authors
- Hatzes, A. P., Cochran, W. D., McArthur, B., Baliunas, S. L., Walker, G. A. H., Campbell, B., Irwin, A. W., Yang, S., Kürster, M., Endl, M., Els, S., Butler, R. P., & Marcy, G. W.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2000-12-01
- Volume
- 544
- Issue
- 2
- Pages
- L145-L148
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W1509303056
- Cited by
- 269
- References
- 24
- FWCI
- 11.12
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Hatzes, A. P., Cochran, W. D., McArthur, B., Baliunas, S. L., Walker, G. A. H., Campbell, B., Irwin, A. W., Yang, S., Kürster, M., Endl, M., Els, S., Butler, R. P., & Marcy, G. W. (2000). Evidence for a Long-Period Planet Orbiting ε Eridani. The Astrophysical Journal. https://doi.org/10.1086/317319
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