Magnetized Dusty Black Holes and Wormholes
Round 1
Reviewer 1 Report
In the model of generalised Tolman solution (supplemented by electric and magnetic charge), the authors consider the possible existence of wormhole throats. The travers ability of this solution is also taken into account. In my opinion the work contains interesting material and will acquire interest of specialists working in this subject.
Author Response
Report 1 ----------- In the model of generalised Tolman solution (supplemented by electric and magnetic charge), the authors consider the possible existence of wormhole throats. The travers ability of this solution is also taken into account. In my opinion the work contains interesting material and will acquire interest of specialists working in this subject. ------------ Answer ------------ We thank the referee for the report, for careful reading of our paper and its approval.Reviewer 2 Report
I want to suggest some opinions on the following two points: (1) The authors used the word 'magnetic field' in the title of Section 2 on page 3, despite dealing with electromagnetic fields when solving the equation. If the authors wish to present it as in the manuscript, they can explain why. (2) Some readers may be interested in the cosmological horizons of the new universe model. If possible, the author can comment on that issue in the new model.
Author Response
Report 2 ----------- I want to suggest some opinions on the following two points: (1) The authors used the word 'magnetic field' in the title of Section 2 on page 3, despite dealing with electromagnetic fields when solving the equation. If the authors wish to present it as in the manuscript, they can explain why. (2) Some readers may be interested in the cosmological horizons of the new universe model. If possible, the author can comment on that issue in the new model.-----------
Answer
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We thank the referee for the report, for careful reading of our paper and the remarks made. (1) We agree that some explanation should be added here. We have changed the title of Section 2, which now reads "Tolman's solution with an electric or magnetic field." We also add a phrase at the beginning of Section 2 saying that we prefer to speak of a magnetic field since it is more realistic from an astrophysical viewpoint. (2) We would say that we do not construct new universe models but rather add a description of a local object, a wormhole, to the well-known, closed FRW model filled with dust - or, more precicely, two copies of such a model. Therefore, each of these universes, taken separately, preserves all its important physical features, including such an issue as a cosmological horizon. However, if the wormhole is large enough, one should also consider the view of "another universe" through this wormhole, which needs a separate study. We add this discussion in the Conclusion.
Reviewer 3 Report
Dear Authors,
The work with title “Magnetized dusty black holes and wormholes“ is good written with nice new results. Paper is devoted theme that the q-Tolman dust clouds can contain wormhole throats under certain conditions on the arbitrary functions f(R) and F(R) of the general solution to the field equations. Also in paper there are very interestig results about the situation that dust layer is matched to external Reissner–Nordström or Schwarzschild space-time regions, the whole configuration is a black hole rather than a wormhole. I can only advice author to a litle bit extend their discussion part of paper and for example discuss their results with some new look on the wormhole published e.q. in Universe 2021, 7(9), 332; Universe 2020, 6(10), 186. This comparison with new look on the wormhole should increase impact and interest about paper. After this minor corrections i can recommend paper for publication in Universe journal.
Author Response
Report 3 ----------- Dear Authors, The work with title “Magnetized dusty black holes and wormholes“ is good written with nice new results. Paper is devoted theme that the q-Tolman dust clouds can contain wormhole throats under certain conditions on the arbitrary functions f(R) and F(R) of the general solution to the field equations. Also in paper there are very interestig results about the situation that dust layer is matched to external Reissner–Nordström or Schwarzschild space-time regions, the whole configuration is a black hole rather than a wormhole. I can only advice author to a litle bit extend their discussion part of paper and for example discuss their results with some new look on the wormhole published e.q. in Universe 2021, 7(9), 332; Universe 2020, 6(10), 186. This comparison with new look on the wormhole should increase impact and interest about paper. After this minor corrections i can recommend paper for publication in Universe journal.-----------
Answer
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We thank the referee for the report, for careful reading of our paper and the remarks made. The paper [Universe 2020, 6(10), 186] by two of the three present authors considered the same kind of dynamic wormhole throats as in the present paper but only without an electromagnetic field and did not address the cosmological version of q-Tolman wormholes. So the present study contains more general and significant results. We add the corresponding remark in the Conclusion of our paper. The other paper pointed out by the referee [Universe 2021, 7(9), 332] has studied static spherically symmetric wormhole solutions of asymptotically safe gravity, while the present paper deals with quite a different subject, dynamic wormholes in general relativity. We therefore mention this work in the Introduction, among other references on static wormholes in modified theories of gravity.
