Magnetic activity of M-type stars from LAMOST+TESS J/ApJS/282/29 ivo://CDS.VizieR/J/ApJS/282/29 CDS Ren L. Zhang L.-Y. Han X.L. Su T. Li W. Wang Y. Misra P. 2026-08-26T13:46:22Z 2026-08-26T11:09:57Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr m-stars visible-astronomy spectroscopy effective-temperature line-intensities stellar-flares stellar-spectral-types photometry We have used 898,351 M-type stellar spectra released by Large Sky Area Multi-Object Fiber Spectroscopic Telescope DR11 to calculate the equivalent width of the CaII infrared triplet (IRT) lines, the residual chromospheric emission, and the parameter R'_8542_, which is defined as the ratio of the luminosity of the 8542{AA} line to the stellar bolometric luminosity. The chromospheric activity of M dwarfs reaches its maximum around an effective temperature of 3700K, corresponding to a spectral type of approximately M6. The stellar photospheric activity begins to become significant at around 3800K, and the trend gradually becomes weaker when approaching 3200K, which may be due to the influence of the magnetic activity saturation zone. Furthermore, metallicity also influences the intensity of the chromospheric activity. We found that chromospheric and photospheric activity in M dwarfs are correlated, and that both types of activity are influenced by stellar rotation. Additionally, we crossmatched our catalog with the Transiting Exoplanet Survey Satellite and identified 23,079 flare events from 3280 stars. Our results show that the majority of the M dwarf flare radiation energy is below 10^36^erg, and the flare duration and energy of nearly all spectral types follow a power-law distribution, i.e., dN/dE{propto}E^-a^ with {alpha}=2. For the cumulative flare frequency distribution's power-law index, we found the range to be between 1.44 and 2. We found that the power-law index {alpha} for fully convective M-type stars is approximately 1.61+/-0.08, while for non-fully convective M-type stars, it is around 1.78+/-0.11. 2026ApJS..282...29R https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/282/29 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021) V/162 : LAMOST DR11 catalogs (Luo+, 2026) J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997) J/A+AS/124/359 : Ca II triplet lines in cool stars (Mallik 1997) J/MNRAS/298/332 : Chromospheric activity-age relation (Rocha-Pinto+ 1998) J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004) J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008) J/AJ/140/1402 : M dwarf flares from SDSS spectra (Hilton+, 2010) J/AJ/141/50 : White-light flares on cool stars (Walkowicz+, 2011) J/AJ/143/67 : SLoWPoKES. II. Wide, low-mass binaries (Dhital+, 2012) J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (Sullivan+, 2015) J/A+A/594/A39 : LAMOST-Kepler param. and activity indicators (Frasca+, 2016) J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017) J/ApJ/849/36 : Flaring activity of M dwarfs in Kepler field (Yang+, 2017) J/MNRAS/476/908 : Chromospheric activity in 4 open clusters (Fang+, 2018) J/ApJ/858/55 : K2 ultracool dwarfs survey. III. M6-L0 flares (Paudel+, 2018) J/ApJS/247/9 : FGK stars magnetic activity in LAMOST-Kepler (Zhang+, 2020) J/ApJ/906/72 : 2344 superflares on 266 solar-type stars (Okamoto+, 2021) J/ApJS/253/19 : Halpha and other EWs of LAMOST M-type stars (Zhang+, 2021) J/ApJ/926/204 : TESS campaign of low-mass flare stars (Howard+, 2022) J/A+A/658/A57 : F-G-K stars activity indicators (Meunier+, 2022) J/A+A/672/A37 : Activity indicators in M dwarfs (Ibanez Bustos+, 2023) J/A+A/669/A15 : TESS flare events and physical parameters (Yang+, 2023) J/ApJS/264/17 : Spectroscopic data of TESS objects with LAMOST (Zhang+, 2023) J/ApJS/274/36 : Magnetic activity from LAMOST DR9, Gaia & TESS (Li+, 2024) J/AJ/168/234 : Flares & flaring stars from TESS (Lin+, 2024) J/A+A/684/A9 : Rotation periods for 261 M dwarfs (Shan+, 2024) J/ApJS/271/60 : Magnetic activity of G stars from LAMOST+TESS (Su+, 2024) J/A+A/686/A164 : Magnetic activity of radio stars (Wang+, 2024) J/A+A/699/A322 : Magnetic activity of RS CVn stars (Xu+, 2025) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/282/29 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/282/29 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/282/29 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/282/29 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/282/29 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/282/29 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/282/29/table1 (LAMOST DR11 low-resolution M-type star catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/282/29/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/282/29/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/282/29/table1? GET text/xml+votable 180.0 50000 true 331.812125 -1.763796 0.005555555555555556 Cone search capability for table J/ApJS/282/29/table2 (Flare parameters of exoplanet system of TESS) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/282/29/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/282/29/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/282/29/table2? GET text/xml+votable 180.0 50000 true 14.4226081 2.843655 0.005555555555555556 Cone search capability for table J/ApJS/282/29/table4 (Remaining chromospheric emission data table) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/282/29/table4? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/282/29/table4? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/282/29/table4? GET text/xml+votable 180.0 50000 true 60.0237197 12.5953083 0.005555555555555556 Cone search capability for table J/ApJS/282/29/table5 (LAMOST and TESS common observation source calculation table) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/282/29/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/282/29/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/282/29/table5? GET text/xml+votable 180.0 50000 true 256.92465 14.44567 0.005555555555555556 2/1 3-5 7-10 19-20 22 24 26 34-35 93-95 109 3/0-2 24 26-27 48-50 67-68 71-74 84-86 92 94 101-102 108-110 112-113 128-130 132 134-135 145-148 153-154 161-164 166 168 171 209 212-213 277 283-284 286 295 297 299 303-306 309-311 317-319 340 342-343 350-351 357 359 361-363 365 367 369-371 406 413 415 421 423 425-426 428 430-432 435 442 445-446 504 4/13-15 33-35 37-40 42-43 45-47 100-101 103 176-177 179 182-183 186-188 204-206 209 211-213 216-218 224 226 256-258 260-262 265-267 276-277 279-280 282-283 300 302-303 348-349 351 373-375 400-402 412-413 415 444 446 457-458 464 480 482 524 527 533-535 579 600 602-603 606-607 610-611 620-621 623-624 628 630 633-634 640 642-643 660 662-663 668-669 671 676-678 680-681 689 691 693-697 699-701 705-710 712-714 736 772-773 786-787 790-792 798 802 833 835 840-842 844 856 861 863-864 867-868 873 880-881 887 911 920 922-923 926 933-935 943-946 958 1103 1107 1114-1115 1117-1119 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25806-25808 25817 25819 25857 25859 25864-25865 25867 25870-25871 25874-25875 25881-25883 25886 25888-25889 25898-25899 25929 26096-26098 26115 26117 26121-26123 26130-26131 26216 26219 26260 26262 26305 26307 26332-26334 26352 26354-26355 26372-26374 26384-26385 26387 26392 26394-26395 26504-26505 26739 26741-26742 26745-26747 26749 26751 26813-26815 26823 26829-26831 26834-26835 26838-26839 26852-26853 26855 26872 26874-26875 26877 26879 26881 26883 26888 26891 26893-26895 26913-26915 27048 27050-27051 27138-27139 27153-27155 27160-27162 27171 27177 27365 27367 27373-27375 27456-27458 27716 27718-27719 27832 27834-27835 28212-28213 28215 28229-28230 28240-28241 28243 28364-28365 28367 28416-28417 28419 28425-28427 28652 28654-28655 29651 29653 29655-29657 29659 29661 29663 29669 29678 29681 29683-29685 29687 29689 29692-29693 29927 29936 29939-29940 29942 29944-29945 29947 29950 30055 30061-30064 30066-30067 30078 30148-30149 30160-30161 30171 30173-30175 30200-30201 30203 30250-30251 30254 30277 30289 30349-30350 30352 30354-30355 30358-30359 30374-30376 30379 30388 30392 30394 30396 30398-30399 30410 30415 30426-30428 30430-30431 30444-30446 30452-30454 30549 30579 30581 30583 30602 30624 30626 30673-30678 30684 30841 30895 30906-30907 30919 30924-30926 30929-30931 30933-30935 30949 30951 30954-30955 30958-30961 30963-30966 30972 30975 31003 31019 31027-31029 31031 31035-31036 31039 31042-31043 31048 31050-31051 31053 31055 31068-31070 31081-31083 31101-31102 31105-31106 31109-31113 31116 31119 31130-31133 31135 31137 31139 31141-31145 31147-31148 31151 31154 31160 31162-31163 31172-31174 31182-31185 31201-31204 31206-31207 31212 31214 31221 31223 31228-31229 31231 31239 31257 31259 31281 31283 31289 31291 31317-31319 31363 31418-31419 31452-31453 31455 31492 31495 31504-31505 31507 31520 31525-31527 31558-31559 31570-31571 31578-31579 31584 31586-31587 31589-31590 31600 31611 31645 31647 31660-31661 31663 31736-31737 31739 31744 31746 31748 31751-31754 31757 31762 31765-31767 31796-31797 31799-31802 31804-31806 31812 31814-31815 31828 31830-31831 31844-31846 31848 31869 31872-31873 31875 31881-31883 31885-31886 31924 31926-31927 31936 31942-31943 31950 31954-31955 31960-31961 31963 31970 31973-31974 31976 31980-31981 31983 31992 31994-31995 31997 31999-32000 32002-32003 32008 32010 32032 32034 32040-32041 32043 32045-32047 32058-32059 32064 32073-32075 32090 32104-32105 32120 32122 32148 32150 32156 32158 32164-32165 32167 32184-32186 32212 32214-32215 32221-32222 32234-32235 32245 32250-32252 32255 32321-32323 32336 32338-32339 32341-32343 32380 32383 32392-32394 32396 32416 32418-32419 32424 32426 32428-32429 32432-32433 32435 32441 32443 32447 32489-32491 32524-32526 32529-32531 32538-32541 32561-32562 32566-32567 32583-32585 32587 32605-32607 32628 32630-32631 32652 32654 32664-32665 32667 32672-32673 32676 32682-32683 32704-32706 32708-32709 32711 36711 36722-36723 36759 36765 36832-36833 36836 36839 36842-36843 36849-36851 40859 40889 40891 40903 40905 40907 40915 40945-40947 45017-45019 48998-48999 49008 49010-49011 49013-49014 49116-49117 49119 49141 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/282/29?format=ascii Optical default J/ApJS/282/29/table1 LAMOST DR11 low-resolution M-type star catalog recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int RAJ2000 Right Ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 [-9.7/89] Declination (J2000) deg pos.eq.dec;meta.main indexed SNR [0/999]? Signal to Noise in the z band stat.snr double nullable SpT Stellar spectral type or object type src.spType char logg [-0.5/9.8]? Stellar log surface gravity log(cm.s**-2) phys.gravity double nullable e_logg [0/24.6]? Uncertainty in logg log(cm.s**-2) stat.error;phys.gravity double nullable Teff [2300/60011]? Effective temperature K phys.temperature.effective int nullable e_Teff [0/2367]? Uncertainty in Teff K stat.error;phys.temperature.effective int nullable EW8498 [-105070.3/25173585]? Calculated residual chromospheric from CaII 8498 Angstrom line; Angstroms 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled double nullable e_EW8498 [0.01/17701]? Uncertainty in EW8498 0.1nm stat.error;stat.fit.residual;spect.line.eqWidth double nullable EW8542 [-1991058/2074122]? Calculated residual chromospheric from CaII 8542 Angstrom line; Angstroms 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled double nullable e_EW8542 [0.04/2077273]? Uncertainty in EW8542 0.1nm stat.error;stat.fit.residual;spect.line.eqWidth double nullable EW8662 [-46215/661894668]? Calculated residual chromospheric from CaII 8662 Angstrom line; Angstroms 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled double nullable e_EW8662 [0.006/2618]? Uncertainty in EW8662 0.1nm stat.error;stat.fit.residual;spect.line.eqWidth double nullable All Display all data for this star (Tables 1, 2, 4 and 5) meta.ref.url char DR11 Display data from LAMOST DR11 LRS (V/162) within 1.5" meta.ref.url char
J/ApJS/282/29/table2 Flare parameters of exoplanet system of TESS Start [1386.27/3339.28] Beginning of the rise time in light curve; BJD-2457000 d time.start double Peak [1386.27/3339.28] Time when light curve begins to decline; BJD-2457000 d time.epoch double End [1386.28/3339.28] Flare end time; BJD-2457000 d time.epoch double Dur [0.005/5.3] Flare duration d time.duration float SpT Stellar spectral type or object type ("DoubleStar", "WD") src.spType char Teff [0/8147] Stellar effective temperature K phys.temperature.effective int e_Teff [0/265]? Uncertainty in Teff K stat.error;phys.temperature.effective int nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int TIC [893123/2053586891] TESS Input Catalog identifier meta.id;meta.main long m_TIC Number of flares for this TIC meta.number int nullable Amp [0.0026/34.82] Flare amplitude src.var.amplitude float e_Amp [0/0.55] Uncertainty in Amp stat.error;src.var.amplitude double Tmag [9/16.3] TESS mean magnitude mag phot.mag;stat.mean float e_Tmag [0/0.6] Uncertainty in Tmag mag stat.error;phot.mag float Eng [0/3.17e+38] Flare energy; erg 1e-07J phys.energy double e_Eng [0/5.32e+35] Uncertainty in Eng 1e-07J stat.error;phys.energy double All Display all data for this star (Tables 1, 2, 4 and 5) meta.ref.url char DR11 Display data from LAMOST DR11 LRS (V/162) within 1.5" meta.ref.url char _RA Positions from TIC v8.2 (IV/39) RAOdeg/DEOdeg (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from TIC v8.2 (IV/39) RAOdeg/DEOdeg (declination part) deg pos.eq.dec;meta.main indexed
J/ApJS/282/29/table4 Remaining chromospheric emission data table SpT Stellar spectral type src.spType char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int RAJ2000 Right Ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 [-9.4/89] Declination (J2000) deg pos.eq.dec;meta.main indexed EW8498 [-1.2/6.1] Calculated residual chromospheric from CaII 8498 Angstrom line 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled float EW8542 [-1.4/6.7] Calculated residual chromospheric from CaII 8542 Angstrom line 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled float EW8662 [-0.8/2.9] Calculated residual chromospheric from CaII 8662 Angstrom line 0.1nm stat.fit.residual;spect.line.eqWidth;meta.modelled float e_EW8498 [0.008/12] Uncertainty in EW8498 0.1nm stat.error float e_EW8542 [0/0.2] Uncertainty in EW8542 0.1nm stat.error float e_EW8662 [0/0.2] Uncertainty in EW8662 0.1nm stat.error float All Display all data for this star (Tables 1, 2, 4 and 5) meta.ref.url char DR11 Display data from LAMOST DR11 LRS (V/162) within 1.5" meta.ref.url char
J/ApJS/282/29/table5 LAMOST and TESS common observation source calculation table logg [4/5.2] Stellar log surface gravity log(cm.s**-2) phys.gravity float recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ObsID [504135/1127611220] LAMOST ObsID meta.note long SNR [40/666] Signal to noise in z band stat.snr float SpT Stellar spectral type src.spType char Teff [3102/4122] Effective temperature K phys.temperature.effective int e_Teff [24/194] Uncertainty in Teff K stat.error;phys.temperature.effective int Prot [0.0027/28.8] Stellar rotation period d time.period float e_logg [0.03/0.51] Uncertainty in logg log(cm.s**-2) stat.error;phys.gravity float R8542