SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Tokovinin Andrei) "

Sökning: WFRF:(Tokovinin Andrei)

  • Resultat 1-2 av 2
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Diaz, Matias R., et al. (författare)
  • TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
  • 2020
  • Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 493:1, s. 973-985
  • Tidskriftsartikel (refereegranskat)abstract
    • The Neptune desert is a feature seen in the radius-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here, we report the Transiting Exoplanet Survey Satellite (TESS) discovery of a new short-period planet in the Neptune desert, orbiting the G-type dwarf TYC 8003-1117-1 (TOI-132). TESS photometry shows transit-like dips at the level of similar to 1400 ppm occurring every similar to 2.11 d. High-precision radial velocity follow-up with High Accuracy Radial Velocity Planet Searcher confirmed the planetary nature of the transit signal and provided a semi-amplitude radial velocity variation of 11.38(-0.85)(+0.84) m s(-1), which, when combined with the stellar mass of 0.97 +/- 0.06 M-circle dot, provides a planetary mass of 22.40(-1.92)(+1.90) M-circle plus. Modelling the TESS light curve returns a planet radius of 3.42(-0.14)(+0.13) R-circle plus , and therefore the planet bulk density is found to be 3.08(-0.46)(+0.44) g cm(-3). Planet structure models suggest that the bulk of the planet mass is in the form of a rocky core, with an atmospheric mass fraction of 4.3(-2.3)(+1.2) percent. TOI-132 b is a TESS Level 1 Science Requirement candidate, and therefore priority follow-up will allow the search for additional planets in the system, whilst helping to constrain low-mass planet formation and evolution models, particularly valuable for better understanding of the Neptune desert.
  •  
2.
  • d'Orgeville, Céline, et al. (författare)
  • Preliminary results of the 2001-2002 Gemini sodium monitoring campaign at Cerro Tololo, Chile
  • 2003
  • Ingår i: Adaptive Optical System Technologies II. Edited by Wizinowich, Peter L.; Bonaccini, Domenico. Proceedings of the SPIE, Volume 4839, pp. 492-503 (2003).. ; 4839:Part 2, s. 492-503
  • Konferensbidrag (refereegranskat)abstract
    • In the near future several astronomical observatories in Chile areplanning to use sodium laser guide stars to increase the sky coverageprovided by their adaptive optics facilities. Knowledge of themesospheric sodium layer behavior is crucial to predict the performanceof future laser guide star adaptive optics systems. Whereas the sodiumlayer has been observed quite extensively at several locations, many ofthem in the Northern Hemisphere, very little measurements have been madein Chile. The Gemini Observatory therefore initiated a year-long sodiummonitoring campaign at the Cerro Tololo Inter-American Observatorylocated only a few kilometers away from the Gemini South telescope wherea conventional laser guide star facility will be offered to thecommunity in 2005, soon to be upgraded to a multi-conjugate adaptiveoptics system with five laser guide stars. This paper reports on thelaser-based sodium monitoring experimental set up and data reductiontechniques, and presents some preliminary results on the sodium columndensity and layer altitude variations observed from February 2001 toFebruary 2002. Implications for the Gemini South Adaptive Optics systemexpected performance are presented as well.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-2 av 2

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy