ATTENZIONE!!! IL SISTEMA E' UTILIZZABILE ESCLUSIVAMENTE IN MODALITA' "CONSULTAZIONE". CAUSA PROBLEMI TECNICI, SI PREGA DI NON EFFETTUARE L'AUTENTICAZIONE, FINO A NUOVA COMUNICAZIONE. GRAZIE
 

EChO spectra and stellar activity II. The case of dM stars

Journal
Date Issued
2015
Author(s)
•
DOI
Abstract
EChO is a dedicated mission to investigate exoplanetary atmospheres. When extracting the planetary signal, one has to take care of the variability of the hosting star, which introduces spectral distortion that can be mistaken as planetary signal. Magneticvariability has to be taken into account in particular for M stars. To this purpose, assuming a one spot dominant model for the stellar photosphere, we develop a mixed observational-theoretical tool to extract the spot's parameters from the observed optical spectrum. This method relies on a robust library of spectral M templates, which we derive using the observed spectra of quiet M dwarfs in the SDSS database. Our procedure allows to correct the observed spectra for photospheric activity in most of the analyzed cases, reducing the spectral distortion down to the noise levels. Ongoing refinements of the template library and the algorithm will improve the efficiency of our algorithm.

Volume
40
Issue
2-3
Start page
711
Uri
Url
Issn Identifier
0922-6435
Ads BibCode
2015ExA....40..711S
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

Scandariato-Micela2015_Article_EChOSpectraAndStellarActivityI.pdf

Description
[Administrators only]
Size

1.19 MB

Format

Adobe PDF

Checksum (MD5)

85c2de87d03371ecd8e979a428a6119a

Loading...
Thumbnail Image
Name

1401.6947.pdf

Description
postprint
Size

754.02 KB

Format

Adobe PDF

Checksum (MD5)

f0935fbaa498800cb77e99e7aef1d8c2