Supernova explosions interacting with aspherical circumstellar
material: implications for light curves, spectral line
profiles, and polarization

J 2020

Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization

KURFÜRST, Petr; Ondřej PEJCHA a Jiří KRTIČKA

Základní údaje

Originální název

Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization

Autoři

KURFÜRST, Petr; Ondřej PEJCHA a Jiří KRTIČKA

Vydání

Astronomy and Astrophysics, Les Ulis, EDP Sciences, 2020, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.803

Kód RIV

RIV/00216224:14310/20:00114394

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1051/0004-6361/202039073

UT WoS

000586542300002

EID Scopus

2-s2.0-85094880886

Klíčová slova anglicky

supernovae: general – circumstellar matter – shock waves – stars: emission-line; Be – polarization

Štítky

14312040, rivok

Příznaky

Recenzováno

Změněno: 4. 1. 2021 10:08, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

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 VaV

Název: Ztráta hmoty v pozdních fázích vývoje hmotných hvězd

Investor: Grantová agentura ČR, Ztráta hmoty v pozdních fázích vývoje hmotných hvězd

LM2018140, projekt VaV

Název: e-Infrastruktura CZ (Akronym: e-INFRA CZ)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, e-Infrastruktura CZ

Citovat

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, 2020, roč. 642, October 2020, s. 1-20. ISSN 0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202039073.

@article{1686952,
   author = {Kurfürst, Petr and Pejcha, Ondřej and Krtička, Jiří},
   article_location = {Les Ulis},
   article_number = {October 2020},
   doi = {https://doi.org/10.1051/0004-6361/202039073},
   keywords = {supernovae: general – circumstellar matter – shock waves – stars: emission-line; Be – polarization},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization},
   url = {https://ui.adsabs.harvard.edu/abs/2020A&A...642A.214K},
   volume = {642},
   year = {2020}
}

TY  - JOUR
ID  - 1686952
AU  - Kurfürst, Petr - Pejcha, Ondřej - Krtička, Jiří
PY  - 2020
TI  - Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization
JF  - Astronomy and Astrophysics
VL  - 642
IS  - October 2020
SP  - 1-20
EP  - 1-20
PB  - EDP Sciences
SN  - 00046361
KW  - supernovae: general – circumstellar matter – shock waves – stars: emission-line
KW  - Be – polarization
UR  - https://ui.adsabs.harvard.edu/abs/2020A&A...642A.214K
L2  - https://ui.adsabs.harvard.edu/abs/2020A&A...642A.214K
N2  - 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.
ER  -

KURFÜRST, Petr; Ondřej PEJCHA a Jiří KRTIČKA. Supernova explosions interacting with aspherical circumstellar material: implications for light curves, spectral line profiles, and polarization. \textit{Astronomy and Astrophysics}. Les Ulis: EDP Sciences, 2020, roč.~642, October 2020, s.~1-20. ISSN~0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202039073.

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