J/A+A/478/507ivo://CDS.VizieR/J/A+A/478/507doi:10.26093/cds/vizier.34780507CDSMorales J.C.Ribas I.Jordi C.2017-06-29T08:56:23Z2008-02-23T14:13:57ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starslate-type-starseffective-temperatureapparent-magnitudeRecent analyses of low-mass eclipsing binary stars have unveiled a significant disagreement between the observations and the predictions of stellar structure models. Results show that theoretical models underestimate the radii and overestimate the effective temperatures of low-mass stars but yield luminosities that accord with observations. A hypothesis based upon the effects of stellar activity was put forward to explain the discrepancies. Here we study the existence of the same trend in single active stars and provide a consistent scenario to explain systematic differences between active and inactive stars in the H-R diagram reported earlier. The analysis is done using single field stars of spectral types late-K and M and computing its bolometric magnitudes and temperatures through infrared colours and spectral indices. The properties of the stars in samples of active and inactive stars are compared statistically to reveal systematic differences. After accounting for a number of possible bias effects, active stars are shown to be cooler than inactive stars of similar luminosity therefore implying a larger radius as well, in proportions that are in excellent agreement with those found from eclipsing binaries. The present results generalise the existence of strong radius and temperature dependences on stellar activity to the entire population of low-mass stars, regardless of their membership in close binary systems.2008A&A...478..507Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/478/507CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)J/AJ/130/1871 : Spectroscopic survey of M dwarfs (Bochanski+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/478/507https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/478/507http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/478/507https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/478/507https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/478/507http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/478/507GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/478/507/stars (Stars studied })https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/478/507/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/478/507/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/478/507/stars?GETtext/xml+votable180.050000true5.4083-46.08990.0055555555555555566/4 30 131 186 307 447 497 624 696 791 811 824 826 835 954 993 1212 1530 1672 1822 1845 1875 1896 1911 1938 2014 2092 2144 2421 2475 2515 2597 2724 2737 2747 2956 3015 3088 3168 3461 3507 3511 3591 3715 3719 3766 3791 3837 3894 4015 4017 4033 4051 4104 4157 4297 4336 4366 4468 4555 4591 4595 4632 4672 4708 4769 4808 5009 5061 5207 5452 5474 5488 5514 5520 5534 5558 5622 5676-5677 5733 5767 5849 5853 5899 5910 5948 6073 6137 6151 6277 6281 6316 6340 6346 6410 6419 6433 6680 6736 6752 6924 6967 7003 7129 7132 7186 7235 7342 7391 7471 7512 7611 7623 7736 7745 7765 7772 7836-7837 7876 7908 7985 8003 8023 8032 8123 8132 8208 8219 8283 8343 8355 8440 8627 8683 8733 8739 8750 8794 8843 8887 8915 8996 9150 9199 9326 9339 9399 9407 9415 9436 9529 9578 9585 9597 9681 9775 9801 9811 9942 9977 10027 10103 10146 10149 10156 10211 10225 10388 10433 10448 10457 10464-10465 10467 10476 10683 10695 10735 10771 10818 10912 10915 10928 10961-10962 10978 10983 11029 11034 11075 11126 11177 11197 11255 11276 11403 11471 11482 11565 11671 11862 11875 11919 11943 12108 12128 12187 12616 12621 12795 12856 12889-12890 13065 13155 13175 13192 13262 13282 13308 13427 13439 13447 13512 13559 13669 13693 13743 13788 13793 13883 13887 13929 13931 13960 14192 14277 14334 14377 14419 14456 14785 14842 14850 14982 15031 15052 15253 15431 15442 15505 15541 15602 15686 15719 15885 15960 16086 16201 16274 16323 16391 16462 16581 16635 16692 16825 16832 16910 16939 16941 16993 17017 17028 17058 17124 17158 17199 17253 17255 17358 17363 17455 17486 17496 17572 17777 17783 17812 17838 17870 17875 17890-17891 18195 18220 18496 18503 18553 18569 18666 18758 18785 18789 18802 18856 18913 18929 19064 19133 19163 19187 19243 19265 19306 19312 19352 19361 19455 19466 19516 19559 19619 19626 19701 19776 19788 19815 19919 19931 20023 20071 20074 20100 20128 20131 20324 20372 20457 20515 20597 20605 20867 20896 21047 21133 21136 21149 21151 21171 21392 21473 21527 21546 21646 21726 21777 21946 21953 22040 22140 22277 22289 22575 22626 22636 22709 22787 22813 22836 22904 22964 23045 23137 23238 23246 23363 23388 23401 23534 23660 23731 23787 23813 24093 24227 24462 24484 24713 24858 24995 25003 25009 25091 25113 25125 25154 25192 25306 25388 25546 25639 25814 25820 25849 25865 25989 26022 26186 26216 26281 26394 26492 26538 26555 26560 26708 26752 26757 26772 26821 26967 27029 27091 27166 27176 27201 27204 27260 27290 27335 27392 27484 27730 27734 27772 27810 27849 27912 27974 28018 28042 28283 28341 28343-28344 28478 28480 28494 28548 28646 28955 29158 29170 29374 29400 29430 29493 29520 29665 29684 29800 29961 30040 30257 30345 30407 30429 30464 30490 30505 30525 30576 30625-30626 30735 30771 30833 30893 30956 30978 31010 31013 31031 31087 31191 31229 31415 31495 31606 31613 31662 31787 32052 32055 32089 32115 32161 32164 32234 32259 32335 32392 32458 32491 32645 32652 32730 33211 33425 33442 33467 33545 33582 33662 33693 33702 33849 33854 33937 33966 34067 34181 34217 34345 34437 34514 34816 34924 34942 34975 34998 35005 35034 35057 35150 35277 35324-35325 35327 35335 35362 35366 35375 35388 35414 35533 35576 35625 35641 35670 35679 35724 35759 35818 35830 35876 36057 36412 36483 36511 36547 36555 36583 36609 36679 36763 36830 36892 37595 37654 37803 37902 37942 38247 38421 38430 38551 38675 38818 38820 38913 38957 39080 39200 39256 39441 39499 39569 40250 40283 40341 40430 40610 40679 40688 40811 40820 40893 41131 41252 41591 41660 42054 42101 42216 42255 42285 42290 42314 42459 42485 42652 42784 42982 43001 43187 43581 43649 43756 43851 43889 43970 44257 44284 44541 44728 44751 44860 44891 44921 44936-44937 44967 45013 45165 45269 45272 45322 45419 45434 45444 45474 45497 45506 45543 45878 45893 45954 45982 46010 46116 46218 46275 46289 46320 46351 46384 46387 46442 46448 46566 46597 46619 46622 46632 46722 46726 46752 46776 47121 47158 47165 47201 47335 47337 47352 47414 47497 47953 48121 48263 48274 48631 48710 48902 48923 48926 48964 49015 49101 49113https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/478/507?format=asciiOpticaldefaultJ/A+A/478/507/starsStars studied }DistHeliocentric distancepcpos.distance;pos.heliocentricfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_[RHG95]Simbad column added by the CDSmeta.notechar[RHG95]Star PMSU numbermeta.id;meta.mainintONameGliese or other identificationmeta.notecharTiO5TiO5 spectral indexspect.indexfloatHalpha? H{alpha} equivalent width (only in table2)0.1nmspect.line.eqWidth;em.line.HalphafloatnullableTeff? Effective temperature (1)Kphys.temperature.effectiveintnullableKmag? K band magnitude (2)magphot.mag;em.IR.KfloatnullableMbol? Bolometric magnitude (3)magphot.mag.bolfloatnullableRem? Remarks (4)meta.noteintnullablePSMUDisplay the data of PSMU Survey, Cat. III/198meta.ref.urlcharSimbadSimbad column added by the CDSchar_RAPosition (as computed from Hawley et al., Cat. III/198 ) (right ascension part)degpos.eq.ra;meta.main_DEPosition (as computed from Hawley et al., Cat. III/198 ) (declination part)degpos.eq.dec;meta.main