Red giant - jet interaction in galactic nuclei: Hydrodynamical
simulations of repetitive stellar passages

D 2022

Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages

KURFÜRST, Petr

Základní údaje

Originální název

Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages

Autoři

KURFÜRST, Petr

Vydání

Cologne-Prague-Brno meeting 2022: Black-hole activity feedback from Bondi-radius to galaxy-cluster scales. 7 s. 2022

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

elektronická verze "online"

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Galactic center; accretion; jets; outflows; red giants; AGB stars; AGN feedback

Příznaky

Mezinárodní význam

Změněno: 15. 9. 2022 21:22, Mgr. Ing. arch. Petr Kurfürst, Ph.D.

Anotace

V originále

The lack of red giants in the Galactic center was discovered more than thirty years ago (Sellgren et al., 1990). Several scenarios were proposed to explain the mechanism responsible for depletion of bright red giants: tidal disruption, star-accretion disk or star-star collisions, infall of a massive cluster or a secondary black hole, or dark-matter collisions with red-giant cores. We continue in numerical investigation of recently proposed scenario for bright red-giant outer layers ablation during the stars' passage through the Galactic nuclear jet which was likely active a few million years ago. We calculate in quite realistic details the repetitive star-jet interactions with orbital distance of 0.001, 0.01, and 0.1 pc from the center of our Galaxy. We simplify the red-giant internal structure as a polytropic model of a 1 Solar mass and 100 Solar radii star, while we assume the relativistic jet with velocities equal or above 0.3c and half-opening angle of 10 degrees. The ongoing simulations reveal the rate of the star ablation in dependence of a number of jet crossings and also the impact of these interactions on further evolution of the stars.

Citovat

KURFÜRST, Petr. Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages. Online. In Cologne-Prague-Brno meeting 2022: Black-hole activity feedback from Bondi-radius to galaxy-cluster scales. 2022, 7 s.

@inproceedings{1863500,
   author = {Kurfürst, Petr},
   booktitle = {Cologne-Prague-Brno meeting 2022: Black-hole activity feedback from Bondi-radius to galaxy-cluster scales.},
   keywords = {Galactic center; accretion; jets; outflows; red giants; AGB stars; AGN feedback},
   howpublished = {elektronická verze "online"},
   language = {eng},
   title = {Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages},
   url = {https://ui.adsabs.harvard.edu/abs/2022bhaf.confE...7K},
   year = {2022}
}

TY  - CONF
ID  - 1863500
AU  - Kurfürst, Petr
PY  - 2022
TI  - Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages
KW  - Galactic center
KW  - accretion
KW  - jets
KW  - outflows
KW  - red giants
KW  - AGB stars
KW  - AGN feedback
UR  - https://ui.adsabs.harvard.edu/abs/2022bhaf.confE...7K
N2  - The lack of red giants in the Galactic center was discovered more than thirty years ago (Sellgren et al., 1990). Several scenarios were proposed to explain the mechanism responsible for depletion of bright red giants: tidal disruption, star-accretion disk or star-star collisions, infall of a massive cluster or a secondary black hole, or dark-matter collisions with red-giant cores. We continue in numerical investigation of recently proposed scenario for bright red-giant outer layers ablation during the stars' passage through the Galactic nuclear jet which was likely active a few million years ago. We calculate in quite realistic details the repetitive star-jet interactions with orbital distance of 0.001, 0.01, and 0.1 pc from the center of our Galaxy. We simplify the red-giant internal structure as a polytropic model of a 1 Solar mass and 100 Solar radii star, while we assume the relativistic jet with velocities equal or above 0.3c and half-opening angle of 10 degrees. The ongoing simulations reveal the rate of the star ablation in dependence of a number of jet crossings and also the impact of these interactions on further evolution of the stars.
ER  -

KURFÜRST, Petr. Red giant - jet interaction in galactic nuclei: Hydrodynamical simulations of repetitive stellar passages. Online. In \textit{Cologne-Prague-Brno meeting 2022: Black-hole activity feedback from Bondi-radius to galaxy-cluster scales.}. 2022, 7 s.

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