Počet záznamů: 1
Adiabatic-radiative shock systems in YSO jets and novae outflows
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SYSNO ASEP 0557219 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Adiabatic-radiative shock systems in YSO jets and novae outflows Tvůrce(i) del Valle, M. (BR)
Araudo, Anabella (ASU-R) ORCID
Suzuki-Vidal, F. (GB)Celkový počet autorů 3 Číslo článku A104 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 660, April (2022)Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova rs-ophiuchi ; particle-acceleration ; astrophysical jets Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA20-19854S GA ČR - Grantová agentura ČR Způsob publikování Open access s časovým embargem (01.05.2023) Institucionální podpora ASU-R - RVO:67985815 UT WOS 000783951200011 EID SCOPUS 85128859010 DOI 10.1051/0004-6361/202142017 Anotace We aim to study the combination of adiabatic and radiative shocks in protostellar jets and novae outflows. We focus on determining the conditions under which this combination is feasible together with its physical implications. Methods. We performed an analytical study of the shocks in both types of sources for a set of parameters by comparing cooling times and propagation velocities. We also estimated the timescales for the growth of instabilities in the contact discontinuity separating both shocks. We studied the hydrodynamical evolution of a jet colliding with an ambient medium with 2D numerical simulations, confirming our initial theoretical estimates. We show that for a wide set of observationally constrained parameters, the combination of an adiabatic and a radiative shock is possible at the working surface of the termination region in jets from young stars and novae outflows. We find that instabilities are developed at the contact discontinuity, mixing the shocked materials. Additionally, we explore the magnetohydrodynamic parameter scaling required for studying protostellar jets and novae outflows using laboratory experiments on laser facilities. The coexistence of an adiabatic and a radiative shock is expected at the termination region of protostellar jets and novae outflows. This scenario is very promising for particle acceleration and gamma-ray emission. The parameters for scaled laboratory experiments are very much in line with plasma conditions achievable in currently operating high-power laser facilities. This provides a new means for studying novae outflows that has never been considered before. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2023 Elektronická adresa https://doi.org/10.1051/0004-6361/202142017
Počet záznamů: 1