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handle: 2445/22746
[cat] Els microquàsars a la galàxia constitueixen, sense cap mena de dubte, una de les més recents aportacions en astrofísica d’altes energies. L’estudi d’aquests objectes nous, estels binaris de raigs X amb ejeccions de plasma relativista, s’ha estès amb rapidesa en la darrera dècada i representa un objectiu de primera magnitud per a la generació actual d’observatoris espacials de raigs X i raigs γ. Darrere d’aquest insòlit interés, existeix l’esperança fundada que el fet d’estudiar-los pugui contribuir a comprendre millor fenòmens anàlegs en quàsars i altres nuclis de galàxies actives que comparteixen una física comuna, salvant les diferències d’escala. Es creu també que els microquàsars es troben entre els responsables del caràcter violent i mutable del firmament de raigs γ, el qual gairebé comencem a percebre. En aquest article passem revista a l’estat general sobre el tema dels microquàsars, la seva identificació i estudi, a la vegada que exposem quines han estat les troballes observacionals i teòriques recents més rellevants en la nostra opinió.
[eng] Microquasars are X-ray binary stars capable of generating relativistic jets. Galactic microquasars are one of the most recent additions to the field of high energy astrophysics and have attracted increasing interest over the last decade. They are now primary targets for all space-based observatories working in the X-ray and γ-ray domains. The hope is that their study will enable us to understand some of the analogous phenomena observed in distant quasars and active galactic nuclei, which have practically the same scaled-up physics as microquasars. Microquasars are also believed to be among the sources responsible for the violent and everchanging appearance of the γ-ray sky. This paper provides a general review of the field of microquasars, including their identification and study, and discusses the recent observational and theoretical discoveries which we regard as being of most relevance.
Astrofísica, Astrophysics, Quasars, Quàsars
Astrofísica, Astrophysics, Quasars, Quàsars
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