J/MNRAS/430/1309ivo://CDS.VizieR/J/MNRAS/430/1309doi:10.26093/cds/vizier.74301309CDSTrinidad M.A.Curiel S.Estalella R.Canto J.Raga A.Torrelles J.M.,Patel N.A.Gomez J.F.Anglada G.Carrasco-Gonzalez C.Rodriguez L.F.2024-07-20T20:14:08Z2014-05-16T14:48:37ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsastrophysical-masersradio-astronomyradio-sourcesIn this paper we analyse multi-epoch very long baseline interferometry water maser observations carried out with the Very Long Baseline Array towards the high-mass star-forming region AFGL 2591. We detected maser emission associated with the radio continuum sources VLA 2 and VLA 3. In addition, a water maser cluster, VLA 3-N, was detected ~0.5arcsec north of VLA 3. We concentrate the discussion of this paper on the spatio-kinematical distribution of the water masers towards VLA 3-N. The water maser emission towards the region VLA 3-N shows two bow-shock-like structures, northern and southern, separated from each other by ~100mas (~330AU). The spatial distribution and kinematics of the water masers in this cluster have persisted over a time span of 7yr. The northern bow shock has a somewhat irregular morphology, while the southern one has a remarkably smooth morphology. We measured the proper motions of 33 water maser features, which have an average proper motion velocity of ~1.3mas/yr (~20km/s). The morphology and the proper motions of this cluster of water masers show systematic expanding motions that could imply one or two different centres of star formation activity. We made a detailed model for the southern structure, proposing two different kinematic models to explain the three-dimensional spatio-kinematical distribution of the water masers: (1) a static central source driving the two bow-shock structures and (2) two independent driving sources, one of them exciting the northern bow-shock structure, and the other one, a young runaway star moving in the local molecular medium exciting and moulding the remarkably smoother southern bow-shock structure. Future observations will be necessary to discriminate between the two scenarios, in particular by identifying the still unseen driving source(s).2013MNRAS.430.1309Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/430/1309CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/475/549 : AFGL 2591 maps in CS, SO and HCN lines (Benz+, 2007)J/A+A/551/A43 : AFGL 2591 multi-wavelength maps (Johnston+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/430/1309https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/430/1309http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/430/1309https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/430/1309https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/430/1309http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/430/1309GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/430/1309/tablea1 (Parameters of the water maser spots detected in AFGL 2591 VLA 3-N)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/430/1309/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/430/1309/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/430/1309/tablea1?GETtext/xml+votable180.050000true307.353649282440.18885202220.0055555555555555566/14689https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/430/1309?format=asciiRadiodefaultJ/MNRAS/430/1309/tablea1Parameters of the water maser spots detected in AFGL 2591 VLA 3-NrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch[1/3] Observed VLBA 2001-2002 epoch (1)time.epochintoRAOffset in right ascension (2)maspos.eq.ra;arith.difffloatoDEOffset in declination (2)maspos.eq.dec;arith.difffloatVlsrLSR velocitykm/sphys.veloc;pos.lsrfloatIntIntensity (in Jy/beam)Jyspect.line.intensityfloat_RAPosition computed from offsets (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from offsets (declination part)degpos.eq.dec;meta.main