J/MNRAS/477/1993ivo://CDS.VizieR/J/MNRAS/477/1993doi:10.26093/cds/vizier.74771993CDSLim B.Sung H.Bessell M.S.Lee S.Lee J.J.Oh H.Hwang N.,Park B.-G.Hur H.Hong K.Park S.2024-08-18T20:18:59Z2021-06-28T13:47:08ZCDS support team

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

cds-question@unistra.frh-ii-regionsradial-velocityOB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of how OB associations were formed remained a mystery. A possible process is self-regulating star formation driven by feedback from massive stars. However, although a number of observational studies uncovered various signposts of feedback-driven star formation, the effectiveness of such feedback has been questioned. Stellar and gas kinematics is a promising tool to capture the relative motion of newborn stars and gas away from ionizing sources. We present high-resolution spectroscopy of stars and gas in the young open cluster NGC 1893. Our findings show that newborn stars and the tadpole nebula Sim 130 are moving away from the central cluster containing two O-type stars, and that the time-scale of sequential star formation is about 1Myr within a 9pc distance. The newborn stars formed by feedback from massive stars account for at least 18 per cent of the total stellar population in the cluster, suggesting that this process can play an important role in the formation of OB associations. These results support the self-regulating star formation model.2018MNRAS.477.1993Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/477/1993CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/443/454 : UBVIH{alpha} photometry in NGC 1893 (Lim+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/477/1993https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/477/1993http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/477/1993https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/477/1993https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/477/1993http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/477/1993GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/477/1993/table2 (Radial velocities of gas measured from H_2_ 1-0 S(1) emission line and the forbidden line [NII]{lambda}6584)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/477/1993/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/477/1993/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/477/1993/table2?GETtext/xml+votable180.050000true80.726533.53136110.005555555555555556Cone search capability for table J/MNRAS/477/1993/table3 (Radial velocities of stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/477/1993/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/477/1993/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/477/1993/table3?GETtext/xml+votable180.050000true80.693916733.41977780.0055555555555555566/1285 1287 1296 1298https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/477/1993?format=asciidefaultJ/MNRAS/477/1993/table2Radial velocities of gas measured from H_2_ 1-0 S(1) emission line and the forbidden line [NII]{lambda}6584recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument (IGRINS or Hectochelle)meta.id;instrcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRVlsrLSR radial velocitykm/sspect.dopplerVeloc;pos.lsrfloate_RVlsrrms uncertainty on RVlsrkm/sstat.error;spect.dopplerVeloc;pos.lsrfloatRemRemarksmeta.notecharJ/MNRAS/477/1993/table3Radial velocities of starsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument (BOES or Hectochelle) (1)meta.id;instrcharIDID from Lim et al. (2014, Cat. J/MNRAS/443/454)meta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRVlsrLSR radial velocitykm/sspect.dopplerVeloc;pos.lsrfloate_RVlsrrms uncertainty on RVlsrkm/sstat.error;spect.dopplerVeloc;pos.lsrfloatRemRemarks (2)meta.notechar