Environments of evolved massive stars: evidence for episodic mass ejections
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00582414" target="_blank" >RIV/67985815:_____/23:00582414 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1017/S1743921322000060" target="_blank" >http://dx.doi.org/10.1017/S1743921322000060</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/S1743921322000060" target="_blank" >10.1017/S1743921322000060</a>
Alternative languages
Result language
angličtina
Original language name
Environments of evolved massive stars: evidence for episodic mass ejections
Original language description
The post-main sequence evolutionary path of massive stars comprises various transition phases, in which the stars shed large amounts of material into their environments. Our studies focus on two of them: B[e] supergiants and yellow hypergiants, for which we investigate the structure and dynamics within their environments. We find that each B[e] supergiant is surrounded by a unique set of rings or arc-like structures. These structures are either stable over time or they display high variability, including expansion and dilution. In contrast, yellow hypergiants are embedded in multiple shells of gas and dust. These objects are famous for their outburst activity. Moreover, the dynamics in their extended atmospheres imply an enhanced pulsation activity prior to outburst. The physical mechanism(s) leading to episodic mass ejections in these two types of stars is still uncertain. We propose that strange-mode instabilities, excited in the inflated envelopes of these objects, play a significant role.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA20-00150S" target="_blank" >GA20-00150S: Structure and evolution of stellar ejecta</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
The Origin of Outflows in Evolved Stars
ISBN
9781108490795
ISSN
1743-9213
e-ISSN
1743-9221
Number of pages
6
Pages from-to
51-56
Publisher name
Cambridge University Press
Place of publication
Cambridge
Event location
virtual
Event date
Nov 1, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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