Colliding winds in and around the stellar group IRS 13E at the galactic centre

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dc.contributor.authorWang, Q. Daniel
dc.contributor.authorLi, J.
dc.contributor.authorRussel, C. M. P.
dc.contributor.authorCuadra Stipetich, Jorge Rodrigo
dc.date.accessioned2020-05-19T20:42:55Z
dc.date.available2020-05-19T20:42:55Z
dc.date.issued2019
dc.description.abstractIRS 13E is an enigmatic compact group of massive stars located in projection only 3.6 arcsec away from Sgr A*. This group has been suggested to be bounded by an intermediate-mass black hole (IMBH). We present a multiwavelength study of the group and its interplay with the environment. Based on Chandra observations, we find the X-ray spectrum of IRS 13E can be well characterized by an optically thin thermal plasma. The emission peaks between two strongly mass-losing Wolf–Rayet stars of the group. These properties can be reasonably well reproduced by simulated colliding winds of these two stars. However, this scenario underpredicts the X-ray intensity in outer regions. The residual emission likely results from the ram-pressure confinement of the IRS 13E group wind by the ambient medium and is apparently associated with a shell-like warm gas structure seen in Pa α and in ALMA observations. These latter observations also show strongly peaked thermal emission with unusually large velocity spread between the two stars. These results indicate that the group is colliding with the bar of the dense cool gas mini-spiral around Sgr A*. The extended X-ray morphology of IRS 13E and its association with the bar further suggest that the group is physically much farther away than the projected distance from Sgr A*. The presence of an IMBH, while favourable to keep the stars bound together, is not necessary to explain the observed stellar and gas properties of IRS 13E
dc.format.extent2496 páginas
dc.fuente.origenOUP
dc.identifier.doi10.1093/mnras/stz3624
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9114052
dc.identifier.urihttps://doi.org/10.1093/mnras/stz3624
dc.information.autorucInstituto de astrofísica ; Wang, Q. Daniel ; S/I ; 1081544
dc.information.autorucInstituto de astrofísica ; Cuadra Stipetich, Jorge Rodrigo ; S/I ; 3855
dc.issue.numero1
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final2496
dc.pagina.inicio2481
dc.publisherOUP
dc.revistaMonthly Notices of the Royal Astronomical Societyes_ES
dc.revistaMonthly Notices of the Royal Astronomical Society
dc.rightsacceso restringido
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.subject.otherGalaxiases_ES
dc.subject.otherEstrellas WRHes_ES
dc.subject.otherAstronomía de rayos Xes_ES
dc.subject.otherHidrodinámicaes_ES
dc.titleColliding winds in and around the stellar group IRS 13E at the galactic centrees_ES
dc.typeartículo
dc.volumen492
sipa.codpersvinculados3855
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