Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/23243
Title: | EChO spectra and stellar activity II. The case of dM stars | Authors: | SCANDARIATO, GAETANO MICELA, Giuseppina |
Issue Date: | 2015 | Journal: | EXPERIMENTAL ASTRONOMY | Number: | 40 | Issue: | 2-3 | First Page: | 711 | 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. <P /> | URI: | http://hdl.handle.net/20.500.12386/23243 | URL: | https://link.springer.com/article/10.1007%2Fs10686-014-9390-5 https://arxiv.org/abs/1401.6947 |
ISSN: | 0922-6435 | DOI: | 10.1007/s10686-014-9390-5 | Bibcode ADS: | 2015ExA....40..711S | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1401.6947.pdf | postprint | 754.02 kB | Adobe PDF | View/Open |
Scandariato-Micela2015_Article_EChOSpectraAndStellarActivityI.pdf | [Administrators only] | 1.22 MB | Adobe PDF |
Page view(s)
64
checked on Apr 20, 2024
Download(s)
19
checked on Apr 20, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.