Sökning: onr:"swepub:oai:research.chalmers.se:bdc05e44-f504-480a-9510-540055aad514" > Rapidly increasing ...
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000 | 04127naa a2200469 4500 | |
001 | oai:research.chalmers.se:bdc05e44-f504-480a-9510-540055aad514 | |
003 | SwePub | |
008 | 171008s2014 | |||||||||||000 ||eng| | |
024 | 7 | a https://research.chalmers.se/publication/2003172 URI |
024 | 7 | a https://doi.org/10.1051/0004-6361/2014238772 DOI |
040 | a (SwePub)cth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Surcis, G.u Joint Institute for VLBI in Europe (JIVE)4 aut |
245 | 1 0 | a Rapidly increasing collimation and magnetic field changes of a protostellar H2O maser outflow |
264 | c 2014-05-22 | |
264 | 1 | b EDP Sciences,c 2014 |
338 | a electronic2 rdacarrier | |
520 | a Context. W75N(B) is a massive star-forming region that contains three radio continuum sources (VLA 1, VLA 2, and VLA 3), which are thought to be three massive young stellar objects at three different evolutionary stages. VLA 1 is the most evolved and VLA 2 the least evolved source. The 22 GHz H2O masers associated with VLA 1 and VLA 2 have been mapped at several epochs over eight years. While the H2O masers in VLA 1 show a persistent linear distribution along a radio jet, those in VLA 2 are distributed around an expanding shell. Furthermore, H2O maser polarimetric measurements revealed magnetic fields aligned with the two structures. Aims. Using new polarimetric observations of H2O masers, we aim to confirm the elliptical expansion of the shell-like structure around VLA 2 and, at the same time, to determine if the magnetic fields around the two sources have changed. Methods. The NRAO Very Long Baseline Array was used to measure the linear polarization and the Zeeman-splitting of the 22 GHz H2O masers towards the massive star-forming region W75N(B). Results. The H2O maser distribution around VLA 1 is unchanged from that previously observed. We made an elliptical fit of the H2O masers around VLA 2. We find that the shell-like structure is still expanding along the direction parallel to the thermal radio jet of VLA 1. While the magnetic field around VLA 1 has not changed in the past similar to 7 years, the magnetic field around VLA 2 has changed its orientation according to the new direction of the major-axis of the shell-like structure and it is now aligned with the magnetic field in VLA 1. | |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
653 | a polarization | |
653 | a masers | |
653 | a magnetic fields | |
653 | a stars: formation | |
653 | a ISM: individual objects: W75N | |
700 | 1 | a Vlemmings, Wouter,d 1974u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)wouterv |
700 | 1 | a van Langevelde, H. J.u Universiteit Leiden (UL),Leiden University (UL),Joint Institute for VLBI in Europe (JIVE)4 aut |
700 | 1 | a Goddi, C.u Joint Institute for VLBI in Europe (JIVE)4 aut |
700 | 1 | a Torrelles, J. M.u Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC4 aut |
700 | 1 | a Canto, J.u Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico4 aut |
700 | 1 | a Curiel, S.u Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico4 aut |
700 | 1 | a Kim, S. W.u Korea Astronomy and Space Science Institute4 aut |
700 | 1 | a Kim, J. S.u National Astronomical Observatory of Japan4 aut |
710 | 2 | a Joint Institute for VLBI in Europe (JIVE)b Chalmers tekniska högskola4 org |
773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 565q 565x 0004-6361x 1432-0746 |
856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/200317/local_200317.pdfx primaryx freey FULLTEXT |
856 | 4 | u https://www.aanda.org/articles/aa/pdf/2014/05/aa23877-14.pdf |
856 | 4 8 | u https://research.chalmers.se/publication/200317 |
856 | 4 8 | u https://doi.org/10.1051/0004-6361/201423877 |
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