Retired a stars and their companions. VII. 18 new Jovian planets

John Asher Johnson, Christian Clanton, Andrew W. Howard, Brendan P. Bowler, Gregory W. Henry, Geoffrey W. Marcy, Justin R. Crepp, Michael Endl, William D. Cochran, Phillip J. MacQueen, Jason Wright, Howard Isaacson

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

We report the detection of 18 Jovian planets discovered as part of our Doppler survey of subgiant stars at Keck Observatory, with follow-up Doppler and photometric observations made at McDonald and Fairborn Observatories, respectively. The host stars have masses 0.927 ≤ M/M ≤ 1.95, radii 2.5 ≤ R/R ≤ 8.7, and metallicities -0.46 ≤ [Fe/H] ≤+0.30. The planets have minimum masses 0.9 M Jup ≤ MP sin i ≲ 13 M Jup and semimajor axes a ≥ 0.76 AU. These detections represent a 50% increase in the number of planets known to orbit stars more massive than 1.5 M and provide valuable additional information about the properties of planets around stars more massive than the Sun.

Original languageEnglish (US)
Article number26
JournalAstrophysical Journal, Supplement Series
Volume197
Issue number2
DOIs
StatePublished - Dec 1 2011

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planets
planet
stars
massive stars
observatories
observatory
subgiant stars
metallicity
orbits
radii
detection

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Johnson, J. A., Clanton, C., Howard, A. W., Bowler, B. P., Henry, G. W., Marcy, G. W., ... Isaacson, H. (2011). Retired a stars and their companions. VII. 18 new Jovian planets. Astrophysical Journal, Supplement Series, 197(2), [26]. https://doi.org/10.1088/0067-0049/197/2/26
Johnson, John Asher ; Clanton, Christian ; Howard, Andrew W. ; Bowler, Brendan P. ; Henry, Gregory W. ; Marcy, Geoffrey W. ; Crepp, Justin R. ; Endl, Michael ; Cochran, William D. ; MacQueen, Phillip J. ; Wright, Jason ; Isaacson, Howard. / Retired a stars and their companions. VII. 18 new Jovian planets. In: Astrophysical Journal, Supplement Series. 2011 ; Vol. 197, No. 2.
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Johnson, JA, Clanton, C, Howard, AW, Bowler, BP, Henry, GW, Marcy, GW, Crepp, JR, Endl, M, Cochran, WD, MacQueen, PJ, Wright, J & Isaacson, H 2011, 'Retired a stars and their companions. VII. 18 new Jovian planets', Astrophysical Journal, Supplement Series, vol. 197, no. 2, 26. https://doi.org/10.1088/0067-0049/197/2/26

Retired a stars and their companions. VII. 18 new Jovian planets. / Johnson, John Asher; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wright, Jason; Isaacson, Howard.

In: Astrophysical Journal, Supplement Series, Vol. 197, No. 2, 26, 01.12.2011.

Research output: Contribution to journalArticle

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Johnson JA, Clanton C, Howard AW, Bowler BP, Henry GW, Marcy GW et al. Retired a stars and their companions. VII. 18 new Jovian planets. Astrophysical Journal, Supplement Series. 2011 Dec 1;197(2). 26. https://doi.org/10.1088/0067-0049/197/2/26