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Article overview
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Extra-solar planets around HD196050, HD216437 and HD160691 | | Hugh R. A. Jones
; R. Paul Butler
; Geoffrey W. Marcy
; Chris G. Tinney
; Alan J. Penny
; Chris McCarthy
; Brad D. Carter
; | | Date: |
13 Jun 2002 | | Journal: | Mon.Not.Roy.Astron.Soc. 337 (2002) 1170 | | Subject: | astro-ph | | Abstract: | We report precise Doppler measurements of the stars HD 216437, HD 196050 and HD 160691 obtained with the Anglo-Australian Telescope using the UCLES spectrometer together with an iodine cell as part of the Anglo-Australian Planet Search. Our measurements reveal periodic Keplerian velocity variations that we interpret as evidence for planets in orbit around these solar type stars. HD 216437 has a period of 1294$pm$250 d, a semi-amplitude of 38$pm$4 m s$^{-1}$ and of an eccentricity of 0.33$pm$0.09. The minimum (M sin $i$) mass of the companion is 2.1$pm$0.3 M$_{
m JUP}$ and the semi-major axis is 2.4$pm$0.5 au. HD 196050 has a period of 1288$pm$230 d, a semi-amplitude of 54$pm$8 m s$^{-1}$ and an eccentricity of 0.28$pm$0.15. The minimum mass of the companion is 3.0$pm$0.5 M$_{
m JUP}$ and the semi-major axis is 2.3$pm$0.5 au. We also report further observations of the metal rich planet bearing star HD 160691. Our new solution confirms the previously reported planet and shows a trend indicating a second, longer-period companion. These discoveries add to the growing numbers of midly-eccentric, long-period extra-solar planets around Sun-like stars. As seems to be typical of stars with planets, both stars are metal-rich. | | Source: | arXiv, astro-ph/0206216 | | Services: | Forum | Review | PDF | Favorites | |
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