J/A+A/461/977ivo://CDS.VizieR/J/A+A/461/977doi:10.26093/cds/vizier.34610977CDSMicela G.Affer L.Favata F.Henry J.P.Gioia I.Mullis C.R.,Sanz-Forcada J.Sciortino D.2017-10-09T13:34:36Z2007-10-29T07:26:56ZCDS support team

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

cds-question@unistra.frsurveysradio-sourcesinfrared-photometrymorgan-keenan-classificationX-ray surveys are a very efficient mean of detecting young stars and therefore allow us to study the young stellar population in the solar neighborhood and the local star formation history in the last billion of years. We want to study the young stellar population in the solar neighborhood, to constrain its spatial density and scale height as well as the recent local star formation history. We analyze the stellar content of the ROSAT North Ecliptic Pole survey, and compare the observations with the predictions derived from stellar galactic model. Since the ROSAT NEP survey is sensitive at intermediate fluxes is able to sample both the youngest stars and the intermediate age stars (younger than 10^9^years), linking the shallow and deep flux surveys already published in the literature. We confirm the existence of an excess of yellow stars in our neighborhood previously seen in shallow survey, which is likely due to a young star population not accounted for in the model. However the excellent agreement between observations and predictions of dM stars casts some doubt on the real nature of this active population.2007A&A...461..977Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/461/977CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJS/149/29 : ROSAT North Ecliptic Pole Survey (Gioia+, 2003)J/A+A/446/97 : NEP Distant Cluster Radio Galaxies (Branchesi+, 2006)J/ApJS/162/304 : ROSAT NEP X-ray source catalog (Henry+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/461/977https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/461/977http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/461/977https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/461/977https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/461/977http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/461/977GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/461/977/table1 (Standard stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/461/977/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/461/977/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/461/977/table1?GETtext/xml+votable180.050000true137.011431127.55901810.005555555555555556Cone search capability for table J/A+A/461/977/table2 (Spectral types of program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/461/977/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/461/977/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/461/977/table2?GETtext/xml+votable180.050000true258.922568.9419440.0055555555555555565/2557 2900-2901 2908 3837 3839 4008 4010-4011 4013 6/684 2436 2466 3044 3714 3719 3786 4444 4917 5026 7286 7978 8035 10202 10205-10206 10221 10223 10226-10227 10232 10234 10238-10239 10406 11608 11611-11613 11615 11636-11637 11640-11641 11643-11645 12464 13301 13440 14278 14986 15327 15343 15345 15347 15352 15354-15355 16010 16014 16036-16037 16048 16050-16051 16058-16059 16061 16098 18139 26552 27752 28147 286058.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/461/977?format=asciiOpticalInfraredRadiodefaultJ/A+A/461/977/table1Standard starsNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTypeMK spectral typesrc.spTypecharr_SpTypeSpectral type reference (1)meta.ref;pos.framecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/461/977/table2Spectral types of program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRXSource name (JHHMM.m+DDMM) from Gioia et al., 2003, Cat. <J/ApJS/149/29>meta.id;meta.maincharNEPNorth Ecliptic Pole scan number from Gioia et al., 2003, Cat. <J/ApJS/149/29>obs.fieldcharRAJ2000Right ascension (J2000)pos.eq.raDEJ2000Declination (J2000)pos.eq.decJmag? J magnitude from 2MASS (Cat. <II/246>)magphot.mag;em.IR.JfloatnullableHmag? H magnitude from 2MASS (Cat. <II/246>)magphot.mag;em.IR.HfloatnullableKmag? K magnitude from 2MASS (Cat. <II/246>)magphot.mag;em.IR.KfloatnullableSpTypeMK spectral typesrc.spTypecharNoteNotes (1)meta.notecharSimbadSimbad column added by the CDSchar_RAPosition (from Gioia et al., J/ApJS/149/29 (right ascension part)degpos.eq.ra;meta.main_DEPosition (from Gioia et al., J/ApJS/149/29 (declination part)degpos.eq.dec;meta.main