KURFÜRST, Petr, Ondřej PEJCHA a Jiří KRTIČKA. Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization. Astronomy and Astrophysics. Les Ulis: EDP Sciences, roč. 642, October 2020, s. 1-20. ISSN 0004-6361. doi:10.1051/0004-6361/202039073. 2020.
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Základní údaje
Originální název Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization
Autoři KURFÜRST, Petr (203 Česká republika, garant, domácí), Ondřej PEJCHA (203 Česká republika) a Jiří KRTIČKA (203 Česká republika, domácí).
Vydání Astronomy and Astrophysics, Les Ulis, EDP Sciences, 2020, 0004-6361.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Francie
Utajení není předmětem státního či obchodního tajemství
WWW URL
Impakt faktor Impact factor: 5.802
Kód RIV RIV/00216224:14310/20:00114394
Organizační jednotka Přírodovědecká fakulta
Doi http://dx.doi.org/10.1051/0004-6361/202039073
UT WoS 000586542300002
Klíčová slova anglicky supernovae: general – circumstellar matter – shock waves – stars: emission-line; Be – polarization
Štítky rivok
Příznaky Recenzováno
Změnil Změnila: Mgr. Marie Šípková, DiS., učo 437722. Změněno: 4. 1. 2021 10:08.
Anotace
Some supernova (SN) explosions show evidence for an interaction with a pre-existing nonspherically symmetric circumstellar medium (CSM) in their light curves, spectral line profiles, and polarization signatures. The origin of this aspherical CSM is unknown, but binary interactions have often been implicated. To better understand the connection with binary stars and to aid in the interpretation of observations, we performed two-dimensional axisymmetric hydrodynamic simulations where an expanding spherical SN ejecta initialized with realistic density and velocity profiles collide with various aspherical CSM distributions. We consider CSM in the form of a circumstellar disk, colliding wind shells in binary stars with different orientations and distances from the SN progenitor, and bipolar lobes representing a scaled down version of the Homunculus nebula of eta Car. We study how our simulations map onto observables, including approximate light curves, indicative spectral line profiles at late times, and estimates of a polarization signature. We find that the SN–CSM collision layer is composed of normal and oblique shocks, reflected waves, and other hydrodynamical phenomena that lead to acceleration and shear instabilities. As a result, the total shock heating power fluctuates in time, although the emerging light curve might be smooth if the shock interaction region is deeply embedded in the SN envelope. SNe with circumstellar disks or bipolar lobes exhibit late-time spectral line profiles that are symmetric with respect to the rest velocity and relatively high polarization. In contrast, SNe with colliding wind shells naturally lead to line profiles with asymmetric and time-evolving blue and red wings and low polarization. Given the high frequency of binaries among massive stars, the interaction of SN ejecta with a pre-existing colliding wind shell must occur and the observed signatures could be used to characterize the binary companion.
Návaznosti
GA18-05665S, projekt VaVNázev: Ztráta hmoty v pozdních fázích vývoje hmotných hvězd
Investor: Grantová agentura ČR, Ztráta hmoty v pozdních fázích vývoje hmotných hvězd
LM2018140, projekt VaVNázev: e-Infrastruktura CZ (Akronym: e-INFRA CZ)
Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, e-Infrastruktura CZ
VytisknoutZobrazeno: 30. 3. 2024 01:15