Sökning: onr:"swepub:oai:DiVA.org:uu-474458" >
MOBSTER - VI. The c...
MOBSTER - VI. The crucial influence of rotation on the radio magnetospheres of hot stars
-
- Shultz, M. E. (författare)
- Univ Delaware, Dept Phys & Astron, 217 Sharp Lab, Newark, DE 19716 USA.
-
- Owocki, S. P. (författare)
- Univ Delaware, Dept Phys & Astron, 217 Sharp Lab, Newark, DE 19716 USA.
-
- ud-Doula, A. (författare)
- Penn State Scranton, Dept Phys, Dunmore, PA 18512 USA.
-
visa fler...
-
- Biswas, A. (författare)
- Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune Univ Campus, Pune 411007, Maharashtra, India.
-
- Bohlender, D. (författare)
- Herzberg Astron & Astrophys Res Ctr, Natl Res Council Canada, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada.
-
- Chandra, P. (författare)
- Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune Univ Campus, Pune 411007, Maharashtra, India.
-
- Das, B. (författare)
- Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune Univ Campus, Pune 411007, Maharashtra, India.
-
- David-Uraz, A. (författare)
- Howard Univ, Dept Phys & Astron, Washington, DC 20059 USA.;Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA.;NASA GSFC, Xray Astrophys Lab, Greenbelt, MD 20771 USA.
-
- Khalack, V (författare)
- Univ Moncton, Dept Phys & dAstron, Moncton, NB E1A 3E9, Canada.
-
- Kochukhov, Oleg (författare)
- Uppsala universitet,Observationell astrofysik
-
- Landstreet, J. D. (författare)
- Armagh Observ & Planetarium, Coll Hill, Armagh BT61 9DG, North Ireland.;Univ Western Ontario, London, ON N6A 3K7, Canada.
-
- Leto, P. (författare)
- INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy.
-
- Monin, D. (författare)
- Herzberg Astron & Astrophys Res Ctr, Natl Res Council Canada, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada.
-
- Neiner, C. (författare)
- PSL Univ, Sorbonne Univ, Univ Paris, Paris Observ,LESIA,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France.
-
- Rivinius, Th (författare)
- ESO European Org Astron Res Southern Hemisphere, Casilla 19001, Santiago 19, Chile.
-
- Wade, G. A. (författare)
- Royal Mil Coll Canada, Dept Phys & Space Sci, Kingston, ON K7K 7B4, Canada.
-
visa färre...
-
Univ Delaware, Dept Phys & Astron, 217 Sharp Lab, Newark, DE 19716 USA Penn State Scranton, Dept Phys, Dunmore, PA 18512 USA. (creator_code:org_t)
- 2022-04-27
- 2022
- Engelska.
-
Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 513:1, s. 1429-1448
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons were previously thought to be accelerated to relativistic velocities in the current sheet formed in the middle magnetosphere by the wind opening magnetic field lines. However, a lack of dependence of radio luminosity on the wind power, and a strong dependence on rotation, has recently challenged this paradigm. We have collected all radio measurements of magnetic early-type stars available in the literature. When constraints on the magnetic field and/or the rotational period are not available, we have determined these using previously unpublished spectropolarimetric and photometric data. The result is the largest sample of magnetic stars with radio observations that has yet been analysed: 131 stars with rotational and magnetic constraints, of which 50 are radio-bright. We confirm an obvious dependence of gyrosynchrotron radiation on rotation, and furthermore find that accounting for rotation neatly separates stars with and without detected radio emission. There is a close correlation between H alpha emission strength and radio luminosity. These factors suggest that radio emission may be explained by the same mechanism responsible for H alpha emission from centrifugal magnetospheres, i.e. centrifugal breakout (CBO), however, while the H alpha-emitting magnetosphere probes the cool plasma before breakout, radio emission is a consequence of electrons accelerated in centrifugally driven magnetic reconnection.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- magnetic reconnection
- stars: early-type
- stars: magnetic fields
- stars: rotation
- radio continuum: stars
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Shultz, M. E.
-
Owocki, S. P.
-
ud-Doula, A.
-
Biswas, A.
-
Bohlender, D.
-
Chandra, P.
-
visa fler...
-
Das, B.
-
David-Uraz, A.
-
Khalack, V
-
Kochukhov, Oleg
-
Landstreet, J. D ...
-
Leto, P.
-
Monin, D.
-
Neiner, C.
-
Rivinius, Th
-
Wade, G. A.
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
- Artiklar i publikationen
-
Monthly notices ...
- Av lärosätet
-
Uppsala universitet