Talk:Astronomer tells Wikinews about discovery of closest black hole known so far

OR
The interview audio and video is uploaded on commons and it is also mentioned in the sister links section. •–• 23:38, 14 May 2020 (UTC)

Email requesting clarification
From: Thomas Rivinius To: Agastya

Dear Agastya,

here are my answers:

On 18/05/20 18:58, Agastya Chandrakant wrote:

No, it the outer one that is the Be star

Again no, this is the outer one.

We know the projected rotation, "v sin i" for the inner one, it is about 40km/s. The remaining parameters will have to be worked out in a more detailed study.

The outer one. Be stars are the most rapidly rotating stars of all.

Semi-amplitude is the difference of maximum - minimum divided by two. "radial velocity" refers to the fact that the stars are in an orbit, meaning from a fixed point of view, they move towards us for a fraction of the time, and recede from us for the remaining time.

 Also, could you please have a look at this paragraph and tell me if any part of it is incorrect: Researchers used the binary mass function to conclude the black hole had a mass of at least 4.2 Solar masses (1 Solar Mass = mass of the Sun). Its companion star, which orbits the black hole in about 40 days, rotates rapidly on its axis. The inner star is classified as a B3 III star, and has a radial velocity semi-amplitude of 61.3 +/- 0.6 km/s. The outer star is classified as a Be star. Be stars are known to rotate around their axis rapidly. Hence, the outer star is not exactly spherical, but instead oblate, bulged at its equator, forming a gas disk around the equator.

Either modify, or completely omit, the second sentence: "Its companion star, which orbits the black hole in about 40 days, rotates rapidly on its axis." -> "Its companion star, which orbits the black hole in about 40 days, rotates much less rapidly around its axis than the outer companion."

Best regards, Rivi

Headline
It most definitely requires a better headline. •–• 21:52, 12 May 2020 (UTC)
 * For one thing, headlinese generally omits "the". --Pi zero (talk) 22:12, 12 May 2020 (UTC)

Categories
This article should have La Silla, La Silla Observatory, ESO categories in future. •–• 22:03, 12 May 2020 (UTC)

Potential typo
As soon as I type "European" of ESO, my brain thinks "S" is for "Space". Watch out for that typo. •–• 03:01, 13 May 2020 (UTC)

Synthesis
This file could be used for the synthesis. •–• 23:37, 14 May 2020 (UTC)

Review of revision 4565025 [Not ready]
Is taken care of, as of 20:32, 19 May 2020 (UTC) •–• 20:32, 19 May 2020 (UTC)

310 ± 60 parsec
This appears to be rough numbers, in units of ten parsecs. Which is more than thirty lightyears. Realistically, the equivalent in lightyears should be 1000 ± 200. I'm allowing 1010 ± 195, but probably shouldn't. It's about not claiming to have greater precision than is actually there. --Pi zero (talk) 23:13, 19 May 2020 (UTC)
 * (The more I think about it, the more uncomfortable I am with the extra precision here... we'll see whether I step it down to 1000 ± 200 by the time the transcript review is complete.) --Pi zero (talk) 23:42, 19 May 2020 (UTC)

Eherpad questions link
Most of the questions were formed here: Etherpad link. •–• 11:08, 3 July 2020 (UTC)