NDLI: A possible influence on standard model of quasars and active galactic nuclei in strong magnetic field

Content Provider	Springer Nature Link
Author	Peng, Qiu He Liu, Jing Jing Chou, Chi Kang
Copyright Year	2016
Abstract	Recent observational evidence indicates that the center of our Milky Way galaxy harbors a super-massive object with ultra-strong radial magnetic field (Eatough et al. in Nature 591:391, 2013). Here we demonstrate that the radiations observed in the vicinity of the Galactic Center (GC) (Falcke and Marko in arXiv:1311.1841v1 , 2013) cannot be emitted by the gas of the accretion disk since the accreting plasma is prevented from approaching to the GC by the abnormally strong radial magnetic field. These fields obstruct the infalling accretion flow from the inner region of the disk and the central massive black hole in the standard model. It is expected that the observed radiations near the GC can not be generated by the central black hole. We also demonstrate that the observed ultra-strong radial magnetic field near the GC (Eatough et al. in Nature 591:391, 2013) can not be generated by the generalized $\alpha$ -turbulence type dynamo mechanism since preliminary qualitative estimate in terms of this mechanism gives a magnetic field strength six orders of magnitude smaller than the observed field strength at $r=0.12~\mbox{pc}$ . However, both these difficulties or the dilemma of the standard model can be overcome if the central black hole in the standard model is replaced by a model of a super-massive star with magnetic monopoles (SMSMM) (Peng and Chou in Astrophys. J. Lett. 551:23, 2001). Five predictions about the GC have been proposed in the SMSMM model. Especially, three of them are quantitatively consistent with the observations. They are: (1) Plenty of positrons are produced, the production rate is $6\times10^{42}~e^{+} \mathrm{s}^{-1}$ or so, this prediction is confirmed by the observation (Knödlseder et al. 2003); (2) The lower limit of the observed ultra-strong radial magnetic field near the GC (Eatough et al. in Nature 591:391, 2013), is just good agreement with the predicted estimated radial magnetic field from the SMSMM model, which really is an exclusive and a key prediction; (3) The observed power peaking of the thermal radiation is essentially the same as the theoretical prediction from the SMSMM model. Furthermore, the observed ultra-strong radial magnetic field in the vicinity of the GC may be considered as the astronomical evidence for the existence of magnetic monopoles as predicted by the particle physics.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	361
Issue Number	12
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-11-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Quasars: general Galaxies: magnetic fields Physical date and processes: black hole physics Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) Astrobiology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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