TY - JOUR
T1 - Mg II h+k Flux - Rotational Period Correlation for G-type stars
AU - Olmedo, Manuel
AU - Chávez, Miguel
AU - Bertone, Emanuele
AU - De la Luz, V.
PY - 2014/3/1
Y1 - 2014/3/1
N2 - We present an analysis of the correlation between the mid-UV Mg II h and
k emission lines and measured rotational periods of G-type stars. Based
on IUE and HST high resolution spectra of a sample of 36 stars, we
derive an exponential function that best represents the correlation. We
find that the variation of the Mg II h + k fluxes is about a factor of
2.5 larger than that of Ca II H+K, indicating that the UV features are
more sensitive to the decline of Prot. The comparison of UV-predicted
rotational periods with those derived from empirical Prot - Ca II H+K
flux calibrations are consistent, with some scatter at large periods,
where the emission are less intense. We present newly derived rotational
periods for 15 G-type stars (see Olmedo et al. 2013).
AB - We present an analysis of the correlation between the mid-UV Mg II h and
k emission lines and measured rotational periods of G-type stars. Based
on IUE and HST high resolution spectra of a sample of 36 stars, we
derive an exponential function that best represents the correlation. We
find that the variation of the Mg II h + k fluxes is about a factor of
2.5 larger than that of Ca II H+K, indicating that the UV features are
more sensitive to the decline of Prot. The comparison of UV-predicted
rotational periods with those derived from empirical Prot - Ca II H+K
flux calibrations are consistent, with some scatter at large periods,
where the emission are less intense. We present newly derived rotational
periods for 15 G-type stars (see Olmedo et al. 2013).
M3 - Article
JO - Search for Life Beyond the Solar System. Exoplanets, Biosignatures & Instruments
JF - Search for Life Beyond the Solar System. Exoplanets, Biosignatures & Instruments
ER -