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Cited by 653

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The CORALIE survey for southern extra-solar planets VII: Two short-period Saturnian companions to HD 108147 and HD 168746

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Pepe, F., Mayor, M., Galland, F., Naef, D., Queloz, D., Santos, N. C., Udry, S., Burnet, M.·2002·Astronomy & Astrophysics

Abstract

We present the discovery of two Saturn-mass companions to HD 108147 and HD 168746. Both belong to the lightest ever discovered planets. The minimum mass of the companion to HD 168746 is of only 0.77 the mass of Saturn and its orbital period is 6.4 days. The companion to HD 108147 orbits its parent star in 10.9 days and its minimum mass is 1.34 that of Saturn. Its orbit is characterized by a high eccentricity, , indicating possibly the presence of a second companion. The detection of Saturn-mass planets by means of the Doppler technique demands high radial-velocity measurement precision. The two new candidates were discovered by means of the CORALIE echelle spectrograph. The instrumental accuracy of CORALIE combined with the simultaneous ThAr-reference technique has reached a level better than 3 m s-1. On many observed objects the precision is now limited by photon noise. We present in this paper the weighted cross-correlation technique, which leads to an improvement in the photon noise of the computed radial velocity. We discuss as well a modification of the numerical cross-correlation mask which reduces significantly the residual perturbation effects produced by telluric absorption lines.

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Metadata

Authors
Pepe, F., Mayor, M., Galland, F., Naef, D., Queloz, D., Santos, N. C., Udry, S., & Burnet, M.
Venue
Astronomy & Astrophysics
Publisher
EDP Sciences
Published
2002-05-31
Volume
388
Issue
2
Pages
632-638
ISSN
  • 0004-6361 (ISSN-L)
  • 1432-0746
OpenAlex
W4292331632
Cited by
653
References
1
FWCI
7.19
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The CORALIE survey for southern extra-solar planets VII: Two short-period Saturnian companions to HD 108147 and HD 168746. https://app.cochat.ai/papers/10.1051/0004-6361:20020433
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Pepe, F., Mayor, M., Galland, F., Naef, D., Queloz, D., Santos, N. C., Udry, S., & Burnet, M. (2002). The CORALIE survey for southern extra-solar planets VII: Two short-period Saturnian companions to HD 108147 and HD 168746. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361%3A20020433

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