From brandenb@nordita.org Mon Dec 5 13:20:12 2022 Date: Mon, 5 Dec 2022 13:20:12 +0100 From: Axel Brandenburg To: Yik Ki Ma CC: "entorm@ia.forth.gr" Subject: Re: Some small comments on review "Galactic Dynamo" Message-ID: References: <67D8F2E4-8164-4EEE-82A4-835E57776F32@anu.edu.au> <108EFFF1-AEED-422F-BBE8-3EB486DBA599@anu.edu.au> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <108EFFF1-AEED-422F-BBE8-3EB486DBA599@anu.edu.au> MIME-Version: 1.0 Thanks, Jackie, for spotting these! > I=E2=80=99ve been giving your nice review paper a read, and spotted a few > critical typos that I thought you might want to know (especially since I > think it will be an excellent reference to many new-comers to the field > in the coming years!): Thanks for looking again into this! > - p.4 Eq 1: I believe it should be \chi =3D (1/2) arctan (U/Q) instead? (= E.g., Brentjens & de Bruyn 2005 Eq 5) Yes, indeed! > - p.4 Eq 2: For the unit of B//, I believe it should be uG instead of G (= E.g., Brentjens & de Bruyn 2005 Eq 3; Beck 2016 review Eq 10) Yes, you are right, and this one was also pointed out to us by Anvar Shukur= ov, but even he missed the other bug above that you noticed! Cheers, Axel On Mon, Dec 05, 2022 at 06:39:32AM +0000, Yik Ki Ma wrote: > Dear Axel, Eva, >=20 >=20 > I=E2=80=99ve been giving your nice review paper a read, and spotted a few= critical typos that I thought you might want to know (especially since I t= hink it will be an excellent reference to many new-comers to the field in t= he coming years!): >=20 > - p.4 Eq 1: I believe it should be \chi =3D (1/2) arctan (U/Q) instead? (= E.g., Brentjens & de Bruyn 2005 Eq 5) >=20 > - p.4 Eq 2: For the unit of B//, I believe it should be uG instead of G (= E.g., Brentjens & de Bruyn 2005 Eq 3; Beck 2016 review Eq 10) >=20 > Thanks again for the nice review, hope that these are helpful and apologi= es if these have been spotted already! >=20 >=20 > Best regards, > Jackie >=20 >=20 >=20 >=20 > ---------- > Dr. Yik Ki (Jackie) Ma > Postdoctoral Researcher > Research School of Astronomy & Astrophysics > The Australian National University, Canberra, ACT, Australia > T: +61 2 6125 4035 > E: yikki.ma@anu.edu.au >=20 > On 8 Nov 2022, at 7:04 pm, Axel Brandenburg wrote: >=20 > Dear Jackie, > Many thanks for your excellent suggestions. We will discuss > them and incorporate unless the editors insist on the already > exceeded page limit. > Cheers, Axel >=20 > On Tue, Nov 08, 2022 at 04:28:29AM +0000, Yik Ki Ma wrote: > Dear Axel, Eva, >=20 >=20 >=20 > Hope this e-mail finds you well! >=20 > Thank you so much for putting together the nice review on Galactic dynamo= ! I truly believe that a comprehensive review on the topic is long overdue. >=20 > I had a quick read on some parts of the paper (especially, Section 6.4) a= nd have some comments, if you don=E2=80=99t mind: >=20 >=20 > - In the 2nd paragraph, you gave a very good historical overview on the A= SS/BSS fields of nearby galaxies. Perhaps it may be useful to also include = here a reference to Beck & Wielebinski (2013), which gives an excellent summary on the determined large= -scale field structure of galaxies? (See Appendix A.2; Rainer Beck has been= actively updating the arXiv version with the latest update back in 2021) >=20 > - In the 3rd paragraph, on the topic of the magnetic field structure in t= he Milky Way disk, perhaps it is worth mentioning that the then-new data fr= om Van Eck et al. (2011) have shown that the Sun et al. (2008) m= odel does not perform satisfactorily. The Van Eck et al. (2011) paper has s= ubsequently developed a new model of the disk magnetic field of the Milky W= ay, which Ma et al. (2020) has shown to perform significantly bett= er compared to Sun et al. (2008) and Jansson & Farrar (2012) towards Galact= ic longitude range of 20-52 deg. Furthermore, Ma et al. (2020) has shown th= at the disk magnetic field in the Sagittarius spiral arm can have odd-parit= y (with direction flipping across the Galactic mid-plane), further adding t= o the complication of the Milky Way disk magnetic field >=20 >=20 > I hope this is helpful! And I=E2=80=99m certain that I will learn a lot f= rom carefully reading through your nice review in the near future! >=20 >=20 >=20 > Best regards, > Jackie >=20 > ---------- > Dr. Yik Ki (Jackie) Ma > Postdoctoral Researcher > Research School of Astronomy & Astrophysics > The Australian National University, Canberra, ACT, Australia > T: +61 2 6125 4035 > E: yikki.ma@anu.edu.au >=20 >=20