Testing Opacities Using the SED Variability of Chemically
Peculiar Stars

D 2018

Testing Opacities Using the SED Variability of Chemically Peculiar Stars

KRTIČKA, Jiří; L. HUANG; T. LUFTINGER; Zdeněk MIKULÁŠEK; E. NIEMCZURA et al.

Základní údaje

Originální název

Testing Opacities Using the SED Variability of Chemically Peculiar Stars

Autoři

KRTIČKA, Jiří; L. HUANG; T. LUFTINGER; Zdeněk MIKULÁŠEK; E. NIEMCZURA; Milan PRVÁK; J. SILVESTER; G. WADE a Juraj ZVERKO

Vydání

SAN FRANCISCO, WORKSHOP ON ASTROPHYSICAL OPACITIES, od s. 195-200, 6 s. 2018

Nakladatel

ASTRONOMICAL SOC PACIFIC

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

tištěná verze "print"

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/18:00101459

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-1-58381-914-2

ISSN

UT WoS

000442055300023

Klíčová slova anglicky

chemically peculiar stars; variable stars; opacity; stellar atmospheres

Příznaky

Mezinárodní význam

Změněno: 30. 4. 2019 09:27, Mgr. Tereza Miškechová

Anotace

ORIG CZ

V originále

Opacity variations across stellar surfaces are the key process producing the spectral energy distribution (SED) variability in chemically peculiar (CP) stars. The opacity variations are caused by the presence of surface spots with enhanced (or depleted) abundances of chemical elements. Simulations of the SED variability of chemically peculiar stars with abundances derived from Doppler mapping provide a detailed test of the continuum (bound free) and line opacities in the model atmospheres. The effect of opacities on the SED is most pronounced in the ultraviolet region. We simulate the ultraviolet and visual SED variability of selected chemically peculiar stars using model atmospheres calculated for actual surface abundances, and compare the predicted SEDs with observational results. We show that the simulations can reliably predict the observed SED and its variability as long as complete bound free and bound bound opacities are used. Therefore, the variability of chemically peculiar stars may serve as a test of opacities included in model atmospheres.

Česky

Povrchová proměnnost opacity způsobuje proměnnost chemicky pekuliárních hvězd. Simulace této proměnnosti s využitím map povrchového rozložení prvků mohou sloužit jako podrobný test opacit v modelech atmosfér.

Návaznosti

GA16-01116S, projekt VaV

Název: Atmosféry a okolohvězdné prostředí magnetických horkých hvězd

Investor: Grantová agentura ČR, Atmosféry a okolohvězdné prostředí magnetických horkých hvězd

Citovat

KRTIČKA, Jiří; L. HUANG; T. LUFTINGER; Zdeněk MIKULÁŠEK; E. NIEMCZURA; Milan PRVÁK; J. SILVESTER; G. WADE a Juraj ZVERKO. Testing Opacities Using the SED Variability of Chemically Peculiar Stars. In Mendoza, C TurckChieze, S Colgan, J. WORKSHOP ON ASTROPHYSICAL OPACITIES. SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC, 2018, s. 195-200. ISBN 978-1-58381-914-2.

@inproceedings{1480412,
   author = {Krtička, Jiří and Huang, L. and Luftinger, T. and Mikulášek, Zdeněk and Niemczura, E. and Prvák, Milan and Silvester, J. and Wade, G. and Zverko, Juraj},
   address = {SAN FRANCISCO},
   booktitle = {WORKSHOP ON ASTROPHYSICAL OPACITIES},
   editor = {Mendoza, C TurckChieze, S Colgan, J},
   keywords = {chemically peculiar stars; variable stars; opacity; stellar atmospheres},
   howpublished = {tištěná verze "print"},
   language = {eng},
   location = {SAN FRANCISCO},
   isbn = {978-1-58381-914-2},
   pages = {195-200},
   publisher = {ASTRONOMICAL SOC PACIFIC},
   title = {Testing Opacities Using the SED Variability of Chemically Peculiar Stars},
   url = {http://adsabs.harvard.edu/abs/2018ASPC..515..195K},
   year = {2018}
}

TY  - CONF
ID  - 1480412
AU  - Krtička, Jiří - Huang, L. - Luftinger, T. - Mikulášek, Zdeněk - Niemczura, E. - Prvák, Milan - Silvester, J. - Wade, G. - Zverko, Juraj
PY  - 2018
TI  - Testing Opacities Using the SED Variability of Chemically Peculiar Stars
PB  - ASTRONOMICAL SOC PACIFIC
CY  - SAN FRANCISCO
SN  - 9781583819142
KW  - chemically peculiar stars
KW  - variable stars
KW  - opacity
KW  - stellar atmospheres
UR  - http://adsabs.harvard.edu/abs/2018ASPC..515..195K
N2  - Opacity variations across stellar surfaces are the key process producing the spectral energy distribution (SED) variability in chemically peculiar (CP) stars. The opacity variations are caused by the presence of surface spots with enhanced (or depleted) abundances of chemical elements. Simulations of the SED variability of chemically peculiar stars with abundances derived from Doppler mapping provide a detailed test of the continuum (bound free) and line opacities in the model atmospheres. The effect of opacities on the SED is most pronounced in the ultraviolet region. We simulate the ultraviolet and visual SED variability of selected chemically peculiar stars using model atmospheres calculated for actual surface abundances, and compare the predicted SEDs with observational results. We show that the simulations can reliably predict the observed SED and its variability as long as complete bound free and bound bound opacities are used. Therefore, the variability of chemically peculiar stars may serve as a test of opacities included in model atmospheres.
ER  -

KRTIČKA, Jiří; L. HUANG; T. LUFTINGER; Zdeněk MIKULÁŠEK; E. NIEMCZURA; Milan PRVÁK; J. SILVESTER; G. WADE a Juraj ZVERKO. Testing Opacities Using the SED Variability of Chemically Peculiar Stars. In Mendoza, C TurckChieze, S Colgan, J. \textit{WORKSHOP ON ASTROPHYSICAL OPACITIES}. SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC, 2018, s.~195-200. ISBN~978-1-58381-914-2.

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