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Type of Tau Ceti and Toliman by Jos Bergervoet
Why is Tau Ceti a G-type star and Toliman (Alpha Cen B) a K-type? In terms of mass, Tau Ceti is actually the lighter one (78% of the Sun's mass vs. 90% for...
February 21st 21 12:45 AM
by Phillip Helbig Go to last post
1 36
MOND confirmed by jacobnavia
In a paper in the Astrophysical Journal, (The Astrophysical Journal, 904:51 (20pp), 2020 November 20) several researches cnfirm MOND's prediction of 1984:...
December 23rd 20 07:44 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
1 393
13th International LISA Symposium online 2020-Sept-01 through -03 by Jonathan Thornburg [remove -animal to reply][_3_]
The 13th International LISA Symposium is happening online today (2020-Sept-01), tomorrow (2020-Sept-02), and thursday...
0 767
Milliquas v6.6 released, includes SDSS-DR16Q by Eric Flesch
The Million Quasars (Milliquas) catalogue v6.6 is released with data from publications to 30-August-2020, with the count of fully classified type-I quasars &...
September 1st 20 10:50 AM
by Eric Flesch Go to last post
0 299
Hubble-Lemaitre constant online talk by Steve Willner
Some may be interested in a Jul 9 online talk "Relieving the Hubble tension with primordial magnetic fields" by Levon Pogosian. Details are at...
July 6th 20 07:46 PM
by Steve Willner Go to last post
0 668
LIGO/Virgo announce detection of a 23/2.6 M_sun black hole coalescence by Jonathan Thornburg [remove -animal to reply][_5_]
The LIGO/Virgo collaboration has just announced their detection of a gravitational-wave signal, GW190814 (observed on 2019 August 14), interpreted as the...
0 481
Monthly Notices of the Royal Astronomical Society: change in business model? by Phillip Helbig (undress to reply)[_2_]
Monthly Notices of the Royal Astronomical Society has charged authors nothing; costs are covered (and more, as the commercial publisher makes a profit and also...
June 17th 20 02:29 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
1 535
OJ 287 proper time atricles in sci.astro needs comments by No Name
Please give comments OJ 287 binary black hole system articles of proper time general relativity analytic solution. Weinberg S. 1972 Gravitation and Cosmology...
June 9th 20 07:22 AM
by No Name Go to last post
0 500
Is the Universe Younger than We Thought? by Nicolaas Vroom
Accordingly to this article: https://medium.com/the-cosmic-companion/is-the-universe-younger-than-we-thought-e8a649a32ec8 "Is the Universe Younger than We...
(Multi-page thread 1 2)
June 7th 20 12:33 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
18 2,911
New Telescope Will Watch Entire Southern Sky in Infrared by Internetado[_4_]
When it's complete, a new infrared telescope in Australia will give astronomers an unprecedented glimpse of the universe. The Dynamic Red All-Sky Monitoring...
May 26th 20 08:55 PM
by Internetado[_4_] Go to last post
0 486
upright Greek letters for constants as opposed to variables by Phillip Helbig (undress to reply)[_2_]
Some journals require upright Greek letters for constants as opposed to variables, for example $\upi$ when used to denote 3.14159... as opposed to a variable...
May 23rd 20 07:10 PM
by Hans Aberg[_3_] Go to last post
2 668
easy(?) cosmology question: what to integrate to get R(t) by Phillip Helbig (undress to reply)[_2_]
When discussing Friedmann models, the usual approach is to start with the Friedmann equation then express dr/dt as a function of R, Omega, lambda, and so on,...
April 30th 20 06:56 PM
by [email protected] Go to last post
1 965
How should one cite the Journal of Cosmology and Astroparticle Physics? by Phillip Helbig (undress to reply)[_2_]
They do have a rather strange numbering scheme. There are 12 "issues" per year, and the volume number is the same as the year number, and really is 4...
April 17th 20 06:39 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
4 804
mnras.cls, hyperref, url: urls do not break across lines by Phillip Helbig
On an old LaTeX installation, things work fine, with one bug I can correct: the URL gets broken by a % (i.e. to make LaTeX ignore the line break) if it is a...
April 16th 20 12:10 PM
by Phillip Helbig Go to last post
0 560
Fate of Outer Planets in the Sun's Red-giant Phase by No Name
In a number of documentaries i've watched over the years when discussing the fate of the inner terrestrial-planets when the Sun enters its' red-giant phase it...
April 11th 20 12:56 AM
by No Name Go to last post
0 550
On "Nonstationarity of AGN variability" -- selection effect by Eric Flesch
A new paper accepted by ApJL, arXiv:2001.04471 "Nonstationarity of AGN variability: The only way to go is down!" by Caplar et al, concludes that visible quasar...
February 27th 20 05:59 AM
by Eric Flesch Go to last post
2 1,013
Luminosity Evolution in Supernova Cosmology by Richard D. Saam
Early-type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology https://arxiv.org/abs/1912.04903 The authors...
January 20th 20 12:04 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
1 754
fourth "live post" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
The concluding talk on open problems in cosmology was given by Joe Silk. I'll mention below a few things I found particularly interesting. Although the...
December 29th 19 08:57 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
2 1,031
third "livepost" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
There has been much discussion, including some here in this newgroup, regarding the "tension" between various measurements of the Hubble constant. In general,...
December 20th 19 07:46 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 971
second "livepost" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
At most of the last few conferences I've been to, including this one,=20 there has been a talk pointing out that primordial black holes could make=20 up most...
December 18th 19 10:54 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 1,011
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