Observation of flux and circular polarization spectra of white dwarfs with low magnetic fields

被引：0
|
作者：
Friedrich, S [1 ]
Ostreicher, R [1 ]
Schweizer, W [1 ]
机构：
[1] LANDESSTERNWARTE HEIDELBERG, D-69117 HEIDELBERG, GERMANY
来源：
ASTRONOMY & ASTROPHYSICS | 1996年 / 309卷 / 01期
关键词：
line; profiles; stars; individual; PG; 0136+251; 1658+441; KUV; 2316+123; magnetic fields; white dwarfs;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present flux and circular polarization spectra for three magnetic white dwarfs - PG 1658+441, PG 0136+251, KW 2316+123 - with magnetic field strengths between 130 Tesla and 3500 Tesla. In this magnetic field range line profiles are strongly influenced by electric fields of about 10(7) V/m present in the dense atmospheres of white dwarfs. Taking these strong electric fields into account we calculate model spectra to compare them with observed spectra. It could be shown that line broadening due to electric and magnetic fields is sufficient to explain the broad line profiles of PG 1658+441 and PG 0136+251.
引用
收藏
页码：227 / 234
页数：8
相关论文
共 50 条
  • [21] A SEARCH FOR MAGNETIC-FIELDS AMONG DA WHITE-DWARFS
    SCHMIDT, GD
    SMITH, PS
    ASTROPHYSICAL JOURNAL, 1995, 448 (01) : 305 - 314
  • [22] Highly sensitive search for magnetic fields in white dwarfs using broad-band circular polarimetry
    Berdyugin, Andrei, V
    Piirola, Vilppu
    Bagnulo, Stefano
    Landstreet, John D.
    Berdyugina, Svetlana, V
    ASTRONOMY & ASTROPHYSICS, 2022, 657
  • [23] Absorption spectra from the n=3 manifold states of Li atoms in magnetic fields of white dwarfs
    Zhao, L. B.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2021, 504 (04) : 5954 - 5966
  • [24] MODELS OF WHITE-DWARFS DISTORTED BY DIFFERENTIAL ROTATION AND MAGNETIC-FIELDS
    GEROYANNIS, VS
    HADJOPOULOS, AA
    ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992, 81 (01) : 377 - 385
  • [25] Monitoring and modelling of white dwarfs with extremely weak magnetic fields
    Landstreet, J. D.
    Bagnulo, S.
    Valyavin, G.
    Valeev, A. F.
    ASTRONOMY & ASTROPHYSICS, 2017, 607
  • [26] Discovery of kilogauss magnetic fields in three DA white dwarfs
    Cuadrado, RA
    Jordan, S
    Napiwotzki, R
    Schmid, HM
    Solanki, SK
    Mathys, G
    ASTRONOMY & ASTROPHYSICS, 2004, 423 (03): : 1081 - 1094
  • [27] MODELS OF WHITE-DWARFS WITH HIGH MAGNETIC-FIELDS
    JORDAN, S
    ASTRONOMY & ASTROPHYSICS, 1992, 265 (02) : 570 - 576
  • [28] Magnetic fields in white dwarfs and stellar evolution
    Tout, CA
    Wickramasinghe, DT
    Ferrario, L
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 355 (03) : L13 - L16
  • [29] Genesis of magnetic fields in isolated white dwarfs
    Briggs, Gordon P.
    Ferrario, Lilia
    Tout, Christopher A.
    Wickramasinghe, Dayal T.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 478 (01) : 899 - 905
  • [30] Magnetic fields and rotation in white dwarfs and neutron stars
    Ferrario, L
    Wickramasinghe, DT
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 356 (02) : 615 - 620
12345