Towards Comprehension of the Variability of the mCP Star CU Virginis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00107583" target="_blank" >RIV/00216224:14310/19:00107583 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Towards Comprehension of the Variability of the mCP Star CU Virginis

Popis výsledku v původním jazyce

The magnetic chemically peculiar (mCP) star CU Virginis is the most enigmatic star among upper main sequence stars. It is an unusually fast rotator showing strictly periodic light variations in all regions of the electromagnetic spectrum, as well as spectroscopic and spectropolarimetric changes. At the same time, it is also the first main-sequence radio pulsar. Exploiting information hidden in phase variations, we monitored the secular oscillation of the rotational period during the last 53 years. Applying our own phenomenological approach, we analyzed 37 975 individual photometric and spectroscopic measurements from 72 data sources and improved the O-C model. All the relevant observations indicate that the secular period variations can be well approximated by a 5th degree polynomial. The outer surface, "fastened" by the global magnetic field, seems to be stable for decades as shown by the constancy of the mutual location of different phase tracers on the stellar surface.

Název v anglickém jazyce

Towards Comprehension of the Variability of the mCP Star CU Virginis

Popis výsledku anglicky

The magnetic chemically peculiar (mCP) star CU Virginis is the most enigmatic star among upper main sequence stars. It is an unusually fast rotator showing strictly periodic light variations in all regions of the electromagnetic spectrum, as well as spectroscopic and spectropolarimetric changes. At the same time, it is also the first main-sequence radio pulsar. Exploiting information hidden in phase variations, we monitored the secular oscillation of the rotational period during the last 53 years. Applying our own phenomenological approach, we analyzed 37 975 individual photometric and spectroscopic measurements from 72 data sources and improved the O-C model. All the relevant observations indicate that the secular period variations can be well approximated by a 5th degree polynomial. The outer surface, "fastened" by the global magnetic field, seems to be stable for decades as shown by the constancy of the mutual location of different phase tracers on the stellar surface.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA16-01116S" target="_blank" >GA16-01116S: Atmosféry a okolohvězdné prostředí magnetických horkých hvězd</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Astronomical Society of the Pacific Conference Series

ISBN

9781583819241

ISSN

1050-3390

e-ISSN

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Počet stran výsledku

6

Strana od-do

125-130

Název nakladatele

ASTRONOMICAL SOC PACIFIC

Místo vydání

SAN FRANCISCO

Místo konání akce

Special Astrophys Observ, Nizhny Arkhyz, RUSSIA

Datum konání akce

1. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000476582000020