VizieR Online Data Catalog: M dwarfs HeI infrared triplet variability (Fuhrmeister+, 2020)
Abstract
The HeI infrared (IR) triplet at 10830Å is known as an activity indicator and has become a primary diagnostic in exoplanetary transmission spectroscopy. The HeI IR lines are a tracer of the stellar extreme-ultraviolet irradiation from the transition region and corona. We study the variability of the HeI IR triplet lines in spectral time series of 319 M dwarf stars, obtained with the CARMENES spectrograph.
We measure the pseudo-equivalent width (pEW) in each stellar spectrum. The integration ranges for the line and the reference bands are found in Table 1 of the paper. For comparison purposes we also measure pEW values of Hα, the bluest CaII IR triplet line, and the HeI D3 line. From these measurements we compute the mean pEW, the median absolute deviation (MAD) and Pearson's correlation coefficients for the lines. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- June 2020
- DOI:
- 10.26093/cds/vizier.36400052
- Bibcode:
- 2020yCat..36400052F
- Keywords:
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- Stars: M-type;
- Spectra: infrared