Authors:
(1) Smaran Deshmukh, Email: [email protected];
(2) Jayant Murthy, Indian Institute of Astrophysics, Bangalore 506034, India ([email protected]).
Table of Links
4. Possible Scenarios and Consequences
THE OTHER SUNS
ONOS
Onos is the parent sun of Kalgash. It gives off a bright yellow light, therefore it must be a Sun-like star. However, it is slightly further away than our own sun, at a distance of 1.2AU. Onos would appear dimmer by a factor of 1.44, or like a bright day in Sao Paulo.
TANO-SITHA
Tano-Sitha are also a white binary pair, further yet brighter than Trey - Patru. This indicates that they could be massive A-type stars or white dwarves.
A-type Stars
Since we want to minimise tidal effects, we shall suppose that they are A9V types at a temperature of 7100K, radius of 1.55 solar radii and 1.62 solar masses. This binary is at the edge of the Kalgash universe at a distance of 110 light minutes. It will have an apparent magnitude of -23.7, much brighter than Dovim! But Asimov mentions that they produce light much fainter than Dovim. They cannot be A-type Stars.
White Dwarfs
In this case, we suppose the stars are similar to Sirius B. They have a surface temperature of 25200K, a radius similar to that of Earth (6370km) and are at a distance of 110 light minutes. Then the apparent magnitude is -18.09 or about 114 times brighter than the full moon.
TREY-PATRU
The secondary binary also produces white light. However, it is closer to Onos than Tano-Sitha, but fainter. The only way this is possible is if it is a cool white dwarf, similar to 40 Eridani B. Then the stars will have a temperature of 16500K, a radius of 0.014 Solar radius and a mass of 0.50 solar mass. At a distance of 100 light-minutes, the apparent magnitude of the binary is -17.38, or around 59 times brighter than the moon.
This paper is available on arxiv under CC BY 3.0 DEED license.
