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VLBI detection of t...
VLBI detection of the AE Aqr twin, LAMOST J024048.51+195226.9
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- Jiang, Pengfei (författare)
- Chinese Academy of Sciences
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- Cui, Lang (författare)
- Chinese Academy of Sciences
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- Liu, Xiang (författare)
- Chinese Academy of Sciences
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- Zhang, Bo (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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- Huang, Yongfeng (författare)
- Nanjing University
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- Cao, Hong Min (författare)
- Shangqiu Normal University
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- An, T. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Shu, Fengchun (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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Tan, Guiping (författare)
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Yuan, Jianping (författare)
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Chinese Academy of Sciences Shanghai Astronomical Observatory Chinese Academy of Sciences (creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society: Letters. - 1745-3925 .- 1745-3933. ; 528:1, s. L112-L116
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- LAMOST J024048.51+195226.9 (J0240+1952) was recently identified as the second AE Aquarii (AE Aqr)-type cataclysmic variable, possessing the fastest known rotating white dwarf. We performed a Very Long Baseline Interferometry (VLBI) observation of J0240+1952 utilizing the European VLBI Network at 1.7 GHz, to obtain the first view of the radio morphology on mas scale. Our high-resolution VLBI image clearly shows that the radio emission is compact on mas scale (≲2 AU), with no evidence for a radio jet or extended emission. The compact radio source has an average flux density of ∼0.37 mJy, and its brightness temperature is given at ∼2.3 × 107 K, confirming a non-thermal origin. The emission exhibits irregular variations on a time-scale of tens of minutes, similar to the radio flares seen in AE Aqr. The measured VLBI position of J0240+1952 is consistent with that derived from Gaia. Our results favour the model in which the radio emission is attributed to a superposition of synchrotron radiation from expanding magnetized blobs of this system.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- stars: magnetic field
- white dwarfs
- techniques: high angular resolution
- radio continuum: stars
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- ref (ämneskategori)
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Jiang, Pengfei
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Cui, Lang
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Liu, Xiang
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Zhang, Bo
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Huang, Yongfeng
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Cao, Hong Min
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visa fler...
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An, T.
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Yang, Jun, 1979
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Shu, Fengchun
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Tan, Guiping
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Yuan, Jianping
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visa färre...
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Chalmers tekniska högskola