Modelling of the ultraviolet and visual SED variability in the hot magnetic Ap star CU Virginis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F12%3A00057077" target="_blank" >RIV/00216224:14310/12:00057077 - isvavai.cz</a>

Výsledek na webu

<a href="http://adsabs.harvard.edu/abs/2012A%26A...537A..14K" target="_blank" >http://adsabs.harvard.edu/abs/2012A%26A...537A..14K</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201117490" target="_blank" >10.1051/0004-6361/201117490</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of the ultraviolet and visual SED variability in the hot magnetic Ap star CU Virginis

Popis výsledku v původním jazyce

Context. The spectral energy distribution (SED) in chemically peculiar stars may be significantly affected by their abundance anomalies. The observed SED variations are usually assumed to be a result of inhomogeneous surface distribution of chemical elements, flux redistribution and stellar rotation. However, the direct evidence for this is still only scarce. Aims: We aim to identify the processes that determine the SED and its variability in the UV and visual spectral domains of the helium-weak star CUVir. Methods: We used the TLUSTY model atmospheres calculated for the appropriate surface chemical composition to obtain the emergent flux and predict the rotationally modulated flux variability of the star. Results: We show that most of the light variations in the vby filters of the Strömgren photometric system are a result of the uneven surface distribution of silicon, chromium, and iron. Our models are only able to explain a part of the variability in the u filter, however.

Název v anglickém jazyce

Modelling of the ultraviolet and visual SED variability in the hot magnetic Ap star CU Virginis

Popis výsledku anglicky

Context. The spectral energy distribution (SED) in chemically peculiar stars may be significantly affected by their abundance anomalies. The observed SED variations are usually assumed to be a result of inhomogeneous surface distribution of chemical elements, flux redistribution and stellar rotation. However, the direct evidence for this is still only scarce. Aims: We aim to identify the processes that determine the SED and its variability in the UV and visual spectral domains of the helium-weak star CUVir. Methods: We used the TLUSTY model atmospheres calculated for the appropriate surface chemical composition to obtain the emergent flux and predict the rotationally modulated flux variability of the star. Results: We show that most of the light variations in the vby filters of the Strömgren photometric system are a result of the uneven surface distribution of silicon, chromium, and iron. Our models are only able to explain a part of the variability in the u filter, however.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Svazek periodika

537

Číslo periodika v rámci svazku

A14

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

14

Strana od-do

"A14"-1,"A11"-14

Kód UT WoS článku

000300416800014

EID výsledku v databázi Scopus

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