J/other/RAA/23.E5001 LAMOST M stars stellar and flare parameters (Meng+, 2023)
Properties of flare events on M stars from LAMOST spectral survey based on
Kepler and TESS light curves.
Meng G., Zhang L.-Y., Su T., Yang Z., Han X.L., Misra P., Long L., Pi Q.,
Zhu Z., Jiang L.
<Res. Astron. Astrophys., 23, 055001 (2023)>
=2023RAA....23e5001M 2023RAA....23e5001M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type ; Stars, flare ; Effective temperatures ; Optical
Keywords: stars: activity - stars: flare - stars: low-mass
Abstract:
A catalog of M stars has been published from the Large Sky Area
Multi-Object Fiber Spectroscopic Telescope data release 7 (LAMOST
DR7). We cross-matched the LAMOST M catalog with Kepler, Kepler 2 (K2)
and Transiting Exoplanet Survey Satellite (TESS) surveys. We obtained
the light curves from the Kepler and TESS surveys. We detected 20047
flare events from 4053 M stars and calculated their durations,
amplitudes, and energies. We analyzed the distribution of the flare
durations and energies. The distributions of flare duration for
Kepler, K2 and TESS peak are at 3-3.5hr, 4-6hr and 1-1.5hr,
respectively. This may be the result of the different cadences for the
three data sets. The highest regions of the flare energies of Kepler,
K2 and TESS are 32-32.5, 32-32.5 and 31-31.5 erg in Log format,
respectively. A linear relationship between flare duration and energy
emerges from our analysis. The ratio of flare duration to total
observational time is approximately 0.2%-0.3% for the Kepler, K2 and
TESS surveys. The occurrence rate of a star with a flare event
increases from the M0 to M4 subtypes. We also determined the spatial
distribution of the flare rate of M stars in the Milky Way. It seems
that the flare rate decreases as the vertical height increases. The
power index of the flare energies is in the region of 1.53-2.32,
which is similar to previous result for solar type star (2.0).
Further, we examined the relationship between the flare amplitude and
chromospheric intensity. The flare activity increases rapidly with the
increase in the Hα EW at the lower values (less approximately 2Å)
and it increases slowly at the higher values.
Description:
We found 11663 flare events of 1794 M stars from the Kepler survey,
3840 flare events of 1190 M stars from the K2 survey, and 4642 flare
events of 1130 M stars from the TESS survey. In total, we detected
20047 flare events associated with 4053 M stars and calculated their
durations, amplitudes, and energies, which are listed in Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 193 20046 Stellar and flare parameters of LAMOST M stars
based on Kepler and TESS light curves.
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- LAMOST LAMOST name (LAMOST JHHMMSS.ss+DDMMSS.s)
28- 40 A13 --- Name1 Other name (from EPIC, KIC or TIC)
42- 54 A13 --- Name2 Other name (from EPIC, KIC or TIC)
56- 57 A2 --- SpType Spectral type
59- 66 F8.3 0.1nm EWHa ? Equivalent width of Hα line
68- 75 F8.3 0.1nm e_EWHa ? Equivalent width of Hα line error
77- 80 I4 K Teff ? Effective temperature
82- 84 I3 K e_Teff ? Effective temperature error
86- 90 F5.3 [cm/s2] logg ? Surface gravity
92- 96 F5.3 [cm/s2] e_logg ? Surface gravity error
98-104 F7.3 Rsun Radius ? Radius
106-110 F5.3 Rsun e_Radius ? Radius error
112-122 F11.6 d Peaktime Peak time
124-134 F11.6 d Begin Rise time
136-146 F11.6 d End Decay time
148-155 F8.6 d FlareInt Flare integration
157-165 F9.6 d e_FlareInt ? Flare integration error
167-175 F9.6 d Amp Flare amplitude
177-184 E8.3 10-7J FlareE ? Flare energy
186-193 E8.3 10-7J e_FlareE ? Flare energy error
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Aug-2023