HD 144812: a transition-phase massive star in a binary system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00640471" target="_blank" >RIV/67985815:_____/25:00640471 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0370876" target="_blank" >https://hdl.handle.net/11104/0370876</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnrasl/slaf028" target="_blank" >10.1093/mnrasl/slaf028</a>
Alternative languages
Result language
angličtina
Original language name
HD 144812: a transition-phase massive star in a binary system
Original language description
In this Letter, we shed light on the evolutionary phase of HD 144812, a Galactic yellow supergiant showing infrared excess that is typically expected for evolved stars undergoing enhanced mass-loss activity. We present high-resolution spectroscopy of the star in the H −and K−band acquired with the GRating INfrared Spectrometer (IGRINS) and further explore multiband imaging of the wider field of view from the ultraviolet to the radio regime. The IGRINS data reveal several lines from the hydrogen series and iron in a double-peaked emission and we here suggest that HD 144812 is orbited by a disc-hosting companion. Furthermore, we report emission in the CO band heads of the star that is modelled to arise from a circumstellar/binary disc (or ring) of ejected gas. The latter consists of material that is expected to have been dredged up from the core of the star to its surface during a prior phase as a red supergiant (RSG). These findings together suggest that HD 144812 is a rare, post-RSG star in a binary system, encouraging further investigation on the effect that the stellar encounters have on triggering instabilities and driving the evolution of the primary star shortly prior to the supernova event.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society: Letters
ISSN
1745-3925
e-ISSN
1745-3933
Volume of the periodical
540
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
"L28"-"L33"
UT code for WoS article
001594574400006
EID of the result in the Scopus database
2-s2.0-105003841348