Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars

R. R. Lefever; T. Shenar; A. A.C. Sander; L. Poniatowski; K. Dsilva; H. Todt

doi:https://doi.org/10.1017/S1743921322002083

Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars

R. R. Lefever, T. Shenar, A. A.C. Sander, L. Poniatowski, K. Dsilva, H. Todt

Research output: Contribution to journal › Article › peer-review

Abstract

The emission line spectra of WR stars are often formed completely in the optically thick stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a profound impact on the determination of the stellar parameters. By comparing Potsdam Wolf-Rayet (PoWR) model spectra calculated with different β laws, we show that the velocity field heavily influences the spectra: by using the appropriate β laws, the entire range of late and early types can be covered with the same stellar model.

Original language	English
Pages (from-to)	505-506
Number of pages	2
Journal	Proceedings of the International Astronomical Union
Volume	18
DOIs	https://doi.org/10.1017/S1743921322002083
State	Published - 1 May 2022
Externally published	Yes

Keywords

binary systems
Spectropolarimetry
WR stars
X-rays

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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https://doi.org/10.1017/S1743921322002083

Cite this

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title = "Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars",

abstract = "The emission line spectra of WR stars are often formed completely in the optically thick stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a profound impact on the determination of the stellar parameters. By comparing Potsdam Wolf-Rayet (PoWR) model spectra calculated with different β laws, we show that the velocity field heavily influences the spectra: by using the appropriate β laws, the entire range of late and early types can be covered with the same stellar model.",

keywords = "binary systems, Spectropolarimetry, WR stars, X-rays",

author = "Lefever, {R. R.} and T. Shenar and Sander, {A. A.C.} and L. Poniatowski and K. Dsilva and H. Todt",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2024.",

year = "2022",

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doi = "https://doi.org/10.1017/S1743921322002083",

language = "الإنجليزيّة",

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journal = "Proceedings of the International Astronomical Union",

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TY - JOUR

T1 - Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars

AU - Lefever, R. R.

AU - Shenar, T.

AU - Sander, A. A.C.

AU - Poniatowski, L.

AU - Dsilva, K.

AU - Todt, H.

N1 - Publisher Copyright: © The Author(s), 2024.

PY - 2022/5/1

Y1 - 2022/5/1

N2 - The emission line spectra of WR stars are often formed completely in the optically thick stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a profound impact on the determination of the stellar parameters. By comparing Potsdam Wolf-Rayet (PoWR) model spectra calculated with different β laws, we show that the velocity field heavily influences the spectra: by using the appropriate β laws, the entire range of late and early types can be covered with the same stellar model.

AB - The emission line spectra of WR stars are often formed completely in the optically thick stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a profound impact on the determination of the stellar parameters. By comparing Potsdam Wolf-Rayet (PoWR) model spectra calculated with different β laws, we show that the velocity field heavily influences the spectra: by using the appropriate β laws, the entire range of late and early types can be covered with the same stellar model.

KW - binary systems

KW - Spectropolarimetry

KW - WR stars

KW - X-rays

UR - http://www.scopus.com/inward/record.url?scp=85206522780&partnerID=8YFLogxK

U2 - https://doi.org/10.1017/S1743921322002083

DO - https://doi.org/10.1017/S1743921322002083

M3 - مقالة

SN - 1743-9213

VL - 18

SP - 505

EP - 506

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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