Ion-ion charge exchange and X-rays from the winds of hot stars

被引：3
|
作者：
Pollock, A. M. T. [1 ]
机构：
[1] European Space Astron Ctr, XMM Newton SOC, European Space Agcy, Villanueva De La Canada 28691, Spain
来源：
ASTRONOMISCHE NACHRICHTEN | 2012年 / 333卷 / 04期
关键词：
plasmas; shock waves; stars: early type; stars:; winds; outflows; stars: Wolf-Rayet; X-rays: stars; EMISSION;
D O I：
10.1002/asna.201211668
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Charge exchange occurs between charged ions with enough energy to overcome Coulomb repulsion, a condition satisfied for collisions at velocities like those of the winds driven from hot stars by radiation pressure. X-ray line ratios in some hot stars are inconsistent with those expected from thermal plasmas excited by electron impact. Ion-ion interactions including charge exchange might be responsible instead if high-velocity collisions between ions are enabled by the presence of a magnetic field in the wind, suggesting a possible alternative mechanism to the widely accepted instability-driven shock model. The nature of a plasma in charge-exchange equilibrium is yet to be determined. (c) 2012 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim
引用
收藏
页码：351 / 354
页数：4
相关论文
共 50 条
  • [1] Testing the reliability of X-rays as a tool for constraining mass-loss rates of hot stars
    Gunderson, Sean J.
    Gayley, Kenneth G.
    Pradhan, Pragati
    Huenemoerder, David P.
    Miller, Nathan A.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 513 (02) : 2663 - 2672
  • [2] A new paradigm for X-rays from hot stars
    Pollock, AMT
    Raassen, AJJ
    PROCEEDINGS OF THE X-RAY UNIVERSE 2005, VOLS 1 AND 2, 2006, 604 : 101 - +
  • [3] Dust entrainment in photoevaporative winds: The impact of X-rays
    Franz, R.
    Picogna, G.
    Ercolano, B.
    Birnstiel, T.
    ASTRONOMY & ASTROPHYSICS, 2020, 635
  • [4] ON WINDS AND X-RAYS OF O-TYPE STARS
    CHLEBOWSKI, T
    GARMANY, CD
    ASTROPHYSICAL JOURNAL, 1991, 368 (01) : 241 - 251
  • [5] X-rays from stars
    Güdel, M
    PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2002, 360 (1798): : 1935 - 1949
  • [6] Magnetic fields, winds and X-rays of massive stars in the Orion Nebula Cluster
    Petit, Veronique
    Wade, G. A.
    Drissen, L.
    Montmerle, T.
    Alecian, E.
    COSMIC MAGNETIC FIELDS: FROM PLANETS, TO STARS AND GALAXIES, 2009, (259): : 449 - +
  • [7] Magnetic fields, winds and X-rays of massive stars in the Orion nebula cluster
    Petit, Veronique
    Wade, Gregg A.
    Alecian, Evelyne
    Drissen, Laurent
    Montmerle, Thierry
    Ud-Doula, Asif
    ACTIVE OB STARS: STRUCTURE, EVOLUTION, MASS-LOSS, AND CRITICAL LIMITS, 2011, (272): : 208 - +
  • [8] X-RAYS FROM COLLIDING STELLAR WINDS
    LUO, D
    MCCRAY, R
    LOW, MMM
    ASTROPHYSICAL JOURNAL, 1990, 362 (01) : 267 - 273
  • [9] A possible origin for X-rays from O stars
    Feldmeier, A
    Puls, J
    Pauldrach, AWA
    ASTRONOMY & ASTROPHYSICS, 1997, 322 (03) : 878 - 895
  • [10] Clumping and X-rays in cooler B supergiant stars
    Bernini-Peron, M.
    Marcolino, W. L. F.
    Sander, A. A. C.
    Bouret, J. -C.
    Ramachandran, V.
    Saling, J.
    Schneider, F. R. N.
    Oskinova, L. M.
    Najarro, F.
    ASTRONOMY & ASTROPHYSICS, 2023, 677
12345