{ "id": "1204.3811", "version": "v1", "published": "2012-04-17T15:14:15.000Z", "updated": "2012-04-17T15:14:15.000Z", "title": "VLBI multi-epoch water maser observations toward massive protostars", "authors": [ "José M. Torrelles", "José F. Gómez", "Nimesh A. Patel", "Salvador Curiel", "Guillem Anglada", "Robert Estalella" ], "comment": "Submitted to Proceedings of IAU Symposium No. 287, Cosmic Masers- from OH to Ho", "categories": [ "astro-ph.GA", "astro-ph.SR" ], "abstract": "VLBI multi-epoch water maser observations are a powerful tool to study the gas very close to the central engine responsible for the phenomena associated with the early evolution of massive protostars. In this paper we present a summary of the main observational results obtained toward the massive star-forming regions of Cepheus A and W75N. These observations revealed unexpected phenomena in the earliest stages of evolution of massive objects (e.g., non-collimated \"short-lived\" pulsed ejections in different massive protostars), and provided new insights in the study of the dynamic scenario of the formation of high-mass stars (e.g., simul- taneous presence of a jet and wide-angle outflow in the massive object Cep A HW2, similar to what is observed in low-mass protostars). In addition, with these observations it has been possible to identify new, previously unseen centers of high-mass star formation through outflow activity.", "revisions": [ { "version": "v1", "updated": "2012-04-17T15:14:15.000Z" } ], "analyses": { "keywords": [ "vlbi multi-epoch water maser observations", "massive protostars", "main observational results", "massive object", "high-mass star formation" ], "tags": [ "journal article" ], "publication": { "doi": "10.1017/S1743921312007338" }, "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "inspire": 1111116, "adsabs": "2012IAUS..287..377T" } } }