SIMBAD references

2015A&A...583L...1O - Astronomy and Astrophysics, volume 583, L1-1 (2015/11-1)

Polar stellar-spots and grazing planetary transits. Possible explanation for the low number of discovered grazing planets.

OSHAGH M., SANTOS N.C., FIGUEIRA P., ADIBEKYAN V.Z., SANTERNE A., BARROS S.C.C. and LIMA J.J.G.

Abstract (from CDS):

We assess whether there is a physically feasible explanation for the few discovered (nearly) grazing planetary transits through all ground- and space-based transit surveys. We performed simulations to generate a synthetic distribution of detectable planets based on their impact parameter, and found that more (nearly) grazing planets should have been detected than have been detected. Our explanation for the insufficient number of (nearly) grazing planets is based on the simple assumption that many (nearly) grazing planets transit host stars that harbor a dark giant polar spot, and thus the transit light-curve vanishes due to the occultation of the grazing planet and the polar spot. We conclude by evaluating the properties required of polar spots to cause the grazing transit light-curve to disappear and find that the spot properties are compatible with the expected properties from observations.

Abstract Copyright:

Journal keyword(s): planetary systems - planets and satellites: detection - stars: activity - starspots - methods: numerical

Simbad objects: 10

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2015A&A...583L...1O and select 'bookmark this link' or equivalent in the popup menu


2022.08.15-12:18:35

© Université de Strasbourg/CNRS

    • Contact