Questions tagged [dwarf-galaxy]

Questions about the smallest galaxies.

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How to find integrated radio flux for the 21-cm line due to HI content in a dwarf galaxy?

Suppose I have a rough estimate of HI gas content (in solar mass units) in a local dwarf galaxy located at a distance say d parsec (at some RA and Dec co-ordinates) with a half-light radius r and I am ...
RADagASTtheBROWN's user avatar
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Could dark matter be ordinary cool matter far away? [duplicate]

We tend to think of the universe as the visible universe, but there could be large amounts of eventually hierarchically ordered, normal, matter that we can only observe at relatively close distances. ...
Lehs's user avatar
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7 votes
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How could ultracompact galaxies form?

Normally, most galaxies such as our Milky Way tend to be diffused. Sure, the Milky Way, for example has 400 billion stars, but it is spread out over 150,000 light years. Which means that the Milky Way ...
Alastor's user avatar
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3 votes
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Formation mechanism of a non-barred 6-arm spiral galaxy

UGC 12588 has an unusual morphology of an old dwarf spheroidal with six very young spiral arms. None of the 24 Simbad references describe its morphology or recent history from the galactic assembly ...
Douglas Bullis's user avatar
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1 answer
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Are Dwarf Galaxies a Subset of Galaxies?

The question is a rather obvious one. In normal English a word like "dwarf" used as an adjective is assumed to modify the following word. Thus a "dwarf galaxy" would be assumed to ...
M. A. Golding's user avatar
3 votes
1 answer
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Does this black hole mass/galaxy stellar mass relation hold for extremely low-mass galaxies?

I read a preprint last week (Palmese & Conselice 2020) that suggested that the recent gravitational wave detection GW190521 could be the end result of a merger of two extremely low-mass galaxies. ...
HDE 226868's user avatar
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What is the highest redshift a galaxy with a known stellar mass can be observed?

As part of my research, I would need the following information which it seems I cannot find it in literature. I would like to know what are the highest redshifts at which $10^{7}$, $10^{8}$, and $10^{...
Rebel's user avatar
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3 votes
2 answers
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How many satellites does the Milky Way have?

The small and large Magellanic clouds are galaxies that are orbiting our own galaxy. How many such "galactic satellites" do we know of?
usernumber's user avatar
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Looking for a Dwarf Galaxy < 500 L.y. in Diameter, which is not a Satellite / Companion, or is at least 500 000 L.y. away from another Galaxy

My goal is to learn about an example of a Dwarf Spheroidal or a Dwarf Irregular Galaxy which is not a Satellite / Companion Galaxy (or is at least 500 000 L.y. away from another Galaxy), and doesn't ...
user23236's user avatar
2 votes
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172 views

How to to compute the expected number of collisions between stars when Milkyway and Andromeda merged? [duplicate]

Can some one tell me how you can roughly estimate the number of collisions when Milkyway and Andromeda merged with each other. I know it is somehow related to the mean free path of the star. But ...
Arpan Das's user avatar
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Does the Canis Major Dwarf Galaxy have a black hole at its centre?

I am just wondering: is there a potential galactic centre out there that's very close to us? I know that CMDG is irregular, but can it still contain a black hole at the centre?
Max's user avatar
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3 votes
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Can we resolve the centers of Milky way's satellite galaxies now?

Two dwarf satellite galaxies of our galaxy have large $\frac{\text{diameter}}{\text{distance}}$ values. And one of them, Canis Major Dwarf, is 8kpc away which is the same with our distance to the ...
questionhang's user avatar
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5 votes
1 answer
628 views

How many stars are in the Sculptor Dwarf Galaxy?

The Sculptor Dwarf Galaxy is a small satellite Galaxy of the Milky Way. There are many such satellites galaxies and I'm trying to compile basic data on them. However, I can't find an estimate for the ...
DrZ214's user avatar
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6 votes
1 answer
235 views

Could supermassive black holes form in dwarf galaxies?

Supermassive black holes often exist in large galaxies (e.g. the Milky Way, Andromeda). They make up a fair portion of the galaxy's mass. Is it possible for a supermassive black hole to form in a ...
HDE 226868's user avatar
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2 votes
2 answers
243 views

Stars in star clusters in SMC and LMC

Is there any catalog or any paper published in any journal that lists the stars discovered under whichever star cluster of the Small Magellanic Cloud (SMC) they belong to? There is one for Large ...
MycrofD's user avatar
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