J/A+A/657/A125 KI diagnostic capabilities for M dwarfs (Fuhrmeister+, 2022)
The CARMENES search for exoplanets around M dwarfs.
Diagnostic capabilities of strong K I lines for photosphere and chromosphere.
Fuhrmeister B., Czesla S., Nagel E., Reiners A., Schmitt J.H.M.M.,
Jeffers S.V., Caballero J.A., Shulyak D., Johnson E.N., Zechmeister M.,
Montes D., Lopez-Gallifa A., Ribas I., Quirrenbach A., Amado P.J.,
Galadi-Enriquez D., Hatzes A.P., Kuerster M., Danielski C., Bejar V.J.S.,
Kaminski A., Morales J.C., Zapatero Osorio M.R.
<Astron. Astrophys. 657, A125 (2022)>
=2022A&A...657A.125F 2022A&A...657A.125F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type ; Spectra, infrared
Keywords: stars: activity - stars: late-type - stars: chromospheres
Abstract:
The strong KI doublet near 7700Å and another doublet near 12500Å
are studied in a sample of 324 M dwarfs using CARMENES spectra. For
the optical doublet we use only the red line, since the blue line is
often contaminated by telluric correction artefacts. Both doublets
have a dominant photospheric component in inactive stars and can be
used as tracers of effective temperature and gravity. For M dwarfs
later than M5.0V the optical doublet lines develop an emission core.
The line is often correlated to Hα for stars with Hα in
emission and anticorrelated for stars with Hα in absorption. The
near-infrared doublet lines very rarely show
correlation/anti-correlation to Hα.
Description:
We measure the pseudo-equivalent width for pEW) of the KI doublet lines
in each stellar spectrum. The integration ranges for the lines and the
reference bands are found in Table 1 of the paper. For comparison
purposes we also measure pEW values of Halpha. From these measurements
we compute the mean pEW, the median absolute deviation (MAD) and
Pearson's correlation coefficients for the lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 189 324 KI doublet measurements
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn CARMENES designation (JHHMMm+DDdA)
15- 44 A30 --- Name Common name of object
49- 54 F6.3 --- corr(He-Ha) Correction coefficient KI optical red
and Hα
62- 66 F5.3 --- p(He-Ha) p-value KI optical red and Halpha
74- 78 F5.3 0.1nm pEW(KIoptb)MAD MAD pseudo-equivalent width
for KI optical blue line
86- 90 F5.3 0.1nm pEW(KIoptr)MAD MAD pseudo-equivalent width
for KI optical red line
98-102 F5.3 0.1nm pEW(KIirb)MAD MAD pseudo-equivalent width
for KI IR blue line
110-114 F5.3 0.1nm pEW(KIirr)MAD MAD pseudo-equivalent width
for KI IR red line
122-126 F5.3 0.1nm pEW(Halpha)MAD MAD pseudo-equivalent width
for Hα line
133-138 F6.3 0.1nm pEW(KIoptb)mean Mean pseudo-equivalent width
for KI optical blue line
145-150 F6.3 0.1nm pEW(KIoptr)mean Mean pseudo-equivalent width
for KI optical red line
158-163 F6.3 0.1nm pEW(KIirb)mean Mean pseudo-equivalent width
for KI IR blue line
170-175 F6.3 0.1nm pEW(KIirr)mean Mean pseudo-equivalent width
for KI IR red line
183-189 F7.3 0.1nm pEW(Halpha)mean Mean pseudo-equivalent width
for Hα line
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Acknowledgements:
Birgit Fuhrmeister, bfuhrmeister(at)hs.uni-hamburg.de
(End) B. Fuhrmeister [Hamburg Univ., Germany], P. Vannier [CDS] 16-Oct-2021