J/AJ/123/3356ivo://CDS.VizieR/J/AJ/123/3356doi:10.26093/cds/vizier.51233356CDSGizis J.E.Reid I.N.Hawley S.L.2023-04-06T16:50:49Z2005-04-29T19:09:13ZCDS support team

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

cds-question@unistra.frm-starsspectroscopyradial-velocityWe present high-resolution echelle spectroscopy of 676 nearby M dwarfs. Our measurements include radial velocities, equivalent widths of important chromospheric emission lines, and rotational velocities for rapidly rotating stars. We identify several distinct groups by their H{alpha} properties and investigate variations in chromospheric activity among early (M0-M2.5) and mid (M3-M6) dwarfs. Using a volume-limited sample together with a relationship between age and chromospheric activity, we show that the rate of star formation in the immediate solar neighborhood has been relatively constant over the last 4Gyr. In particular, our results are inconsistent with recent large bursts of star formation. We use the correlation between H{alpha} activity and age as a function of color to set constraints on the properties of L and T dwarf secondary components in binary systems. We also identify a number of interesting stars, including rapid rotators, radial velocity variables, and spectroscopic binaries.2002AJ....123.3356Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/3356CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/123/3356https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/123/3356http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/123/3356https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/123/3356https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/123/3356http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/123/3356GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/123/3356/table4 (Equivalent Widths)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/123/3356/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/123/3356/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/123/3356/table4?GETtext/xml+votable180.050000true1.29536845.7865670.0055555555555555566/4 22 131 265 307 411 447 497 520 527 546 624 725 811 826 993 1098 1122 1212 1276 1423 1505 1672 1791 1822 1845 1856 1875 1896 1911 1938 1953 2014 2092 2144 2505 2515 2545 2597 2724 2737 2747 2911 3015 3031 3088 3118 3227 3266 3280 3345 3507 3591 3658 3715 3719 3751 3766 3791 3837 3894 4015 4017 4033 4099 4104 4158 4240 4250 4297 4336 4366 4444 4468 4595 4693 4708 4775 4808 4845 4937 5000 5009 5061 5207 5333 5343 5387 5420 5488 5514 5534 5590 5676 5849 5853 5899 5910 5998 6026 6073 6153 6277 6281 6316 6340 6346 6384 6433 6513 6552 6672 6726 6736 6894 6924 6974 7003 7103 7132 7181 7262 7264 7395 7471 7512 7611 7625 7665 7736 7765 7772 7775 7810 7836 7876 7937 7950 7985 8003 8022-8023 8032 8123 8132 8163 8208 8219 8240 8246 8394 8440 8562 8592 8627 8650 8690 8733 8739 8773 8794 8843 8915 8985 8996 9154 9188 9199 9266 9326 9339 9407 9432 9529 9578 9585 9597 9603 9629 9696 9811 10027 10037 10146 10149 10156 10169 10203 10211 10225 10278 10303 10388 10448 10457 10464-10465 10467 10497 10683 10695 10721 10735 10771 10818 10928 10983 11029 11034 11126 11177 11276 11403 11447 11471 11482 11636 11671 11862 11919 11943 11962 12128 12187 12191 12440 12454 12616 12621 12679 12777 12795 12865 12889 12926 13155 13158 13175 13216 13301 13308 13451 13512 13559 13567 13670 13688 13693 13743 13788 13883 13887 13929 14266 14277 14314 14377 14395 14410 14456 14515 14709 14772 14781 14785 14850 14924 14985 14993-14994 15031 15052 15061 15311 15346 15431 15442 15530 15548 15576 15598 15602 15635 15719 15727 15885 15960 16041 16201 16266 16274 16301 16502 16692 16754 16758 16827 16910 16959 16993 17017 17020 17028 17058 17158 17186 17199 17202 17271 17348 17358 17453 17486 17511 17572 17870 17875 18016 18195 18268 18440 18450 18496 18538 18553 18569 18588 18666 18747 18761 18789 18802 18856 18913 19050 19064 19103 19133 19265 19306 19320 19361 19466 19536 19606 19619 19626 19668 19777 19931 20023 20071 20074 20100 20109 20238 20311 20372 20457 20459 20597 20867 20896 21047 21050 21136 21149 21151 21171 21369 21399 21427 21473 21646 21726 21747 21925 21953 22014 22040 22148 22222 22277 22289 22309 22325 22575 22626 22636 22645 22700 22709 22773 22807 22813 22964 23047 23056 23207 23246 23363 23388 23564 23660 23718-23719 23730-23731 23735 23743 23867 23910 23997 24093 24209 24213 24227 24356 24362 24858 24995 25003 25009 25091 25113 25125 25192 25281 25363 25388 25426 25546 25820 25849 25989 26022 26186 26207 26216 26279 26281 26288 26327 26394 26487 26492 26495 26538 26555 26560 26583 26699 26757 26772 26821 26972 27029 27166 27201 27204 27260 27289 27335 27392 27419 27456 27459 27462 27519 27730-27731 27734 27762 27772 27799 27820 27912 27973 28018 28042 28223 28283 28341 28343-28344 28477 28494 28548 28646 28826 28928 28955 29158 29170 29203 29374 29430 29458 29520 29665 29684 29800 29855 30189 30257 30327 30345 30350 30407 30429 30490 30505 30522 30525 30626 30638 30771 30833 30893 30978 31010 31014 31019 31031 31035 31087 31191 31229 31606 31662 31781 31787 31811 31956 31986 32015 32033 32052 32055 32076 32093 32115 32229 32234 32259 32296 32319 32335 32392 32458 32491 32500 32553 32588 32645 32678 32730 35679 35759 35950 36057 36160 36174 36347 36412 36483 36511 36526 36614 36658 36679 36732 40250 40283 40359 40386 40430 40436 40505 40513 40610 40688 40811 42910 42982 43001 43889 43970 44284 44437 44518 44541 44696 44728 44751 44860 44866 44921 44936-44937 44967 44970 45013 46953 48303 48485 48500 48710 48731 48923 48926 48935 48958 48964 48985 49101 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/123/3356?format=asciiOpticaldefaultJ/AJ/123/3356/table2Radial VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.int[RHG95]? The number from Papers I and II (G1)intnullableNameStar namecharJDJulian Date of observationddoubleRV? Radial velocitykm/sfloatnullable<RV>Mean radial velocitykm/sfloate_<RV>? Observed standard dispersion of <RV>km/sfloatnullableComCommentscharJ/AJ/123/3356/table4Equivalent WidthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.int[RHG95]The number from Papers I and II (G1)intprimaryEWHaThe average H{alpha} equivalent width (2)0.1nmfloatEWHeD3? The average He D3 (5876) equivalent width (2)0.1nmfloatnullableEWHe6678? The average He (6678) equivalent width (2)0.1nmfloatnullableEWHb? The average H{beta} equivalent width (2)0.1nmfloatnullableEWHg? The average H{gamma} equivalent width (2)0.1nmfloatnullableEWHd? The average H{delta} equivalent width (2)0.1nmfloatnullableEWHe? The average H{epsilon} equivalent width (2)0.1nmfloatnullableEWH6? The average H6 equivalent width (2)0.1nmfloatnullableo_EWHaNumber of H{alpha} observationsinte_EWHa? Observed standard dispersion of EWHa (2)0.1nmfloatnullablee_EWHb? Observed standard dispersion of EWHb (2)0.1nmfloatnullableSimbadNameSimbad column added by the CDScharGJGet details from Third Catalalog of Nearby Stars (V/70)charRHG95Get details Palomar/MSU nearby star spectroscopic survey (III/198)char_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.mainJ/AJ/123/3356/table6Double-lined binariesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.int[RHG95]? Sequential numberintnullableNameNamecharRef[1-3]? Reference (1)intnullable