Questions tagged [brown-dwarf]

Questions about sub-stellar objects that are like stars but never achieve permanent nuclear fusion because they are too low-mass.

10 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5 votes
0 answers
97 views

Why do degenerate objects get hotter as more mass is added?

After reading this question, I decided to post a question about degeneracy. I've seen simulations on large, $15\text{+ }M_J$ objects that are accreting mass. They do not grow in radius, instead they ...
slowerthanstopped's user avatar
2 votes
0 answers
41 views

How do I calculate the flux density of a substellar object?

I am currently trying to generate photometric passband colors for brown dwarfs and planets generated through MESA (Modules for Experiments in Stellar Astrophysics). I believe I understand the ...
Ankit Biswas's user avatar
1 vote
0 answers
80 views

What would happen if a low-mass primordial black hole was captured by a brown dwarf or planet mass object?

Prompted by a recent PBS SpaceTime video The video in question discusses what would happen if a low-mass (asteroid-mass) primordial black hole were captured in the core of a Sun-like star (a so-called ...
asgallant's user avatar
  • 461
1 vote
0 answers
119 views

Mass range of a sub-brown dwarf

Sub-brown dwarfs are celestial object that have planetary mass or are termed "Planetary mass object/planemos". They do not lie in the range 13-80 MJ that defines "normal" brown ...
user avatar
1 vote
0 answers
65 views

Power law of object mass in Milky way

Red dwarfs are more common than larger stars. Does this trend continue to smaller objects? If you take every "condensed object" from dust grains through asteroids, planets, and stars in the ...
Kevin Kostlan's user avatar
1 vote
0 answers
21 views

Can (neo)WISE detect the coolest Y-dwarfs?

The WISE telescope discovered some Y brown dwarfs already. Is the neoWISE mission able to detect even the coolest ones (such as Y9 dwarfs) within five light-years distance? If so, the telescope would ...
John's user avatar
  • 1,548
1 vote
0 answers
74 views

How are Y-dwarf spectral subtypes defined?

It is often stated that the spectral subtype indicates the relative position between spectral types, e.g. G5 being halfway from the start of spectral type G to the beginning of spectral type F. Given ...
user avatar
0 votes
0 answers
49 views

How do I code the formula for the minimum mass of a stellar fragment from Whitworth & Stamatellos, 2006?

I was researching the formation of brown dwarfs, and I stumbled into the paper "The minimum mass for star formation, and the origin of binary brown dwarfs", and I am attempting to code a ...
Ankit Biswas's user avatar
0 votes
0 answers
110 views

How luminous does a brown dwarf have to be to illuminate an Earth-sized planet with 0.5 lux at 2,000,000 kilometers away?

A brown dwarf is a deuterium-fusing substellar object, and, in the cases of the larger ones, a lithium-fusing one. They often emit electromagnetic radiation in frequencies that humans cannot see. ...
KEY_ABRADE's user avatar
-1 votes
1 answer
1k views

Maximum and minimum masses and sizes of giant planets?

What are the minimum & maximum masses and diameters of giant planets? Minimum end of the scale Earth has mass of 1 Earth mass and a mean radius of 6,371.0 kilometers, and thus a mean diameter of ...
M. A. Golding's user avatar