A
Ava Polzin
1
APPEARANCES
1
PODCASTS
012
DEC 30
JAN 6
JAN 13
JAN 20
JAN 27
FEB 3
FEB 10
FEB 17
FEB 24
MAR 3
MAR 10
MAR 17
MAR 24
MAR 31
APR 7
APR 14
APR 21
APR 28
MAY 5
MAY 12
MAY 19
MAY 26
JUN 2
JUN 9
JUN 16
JUN 23
JUN 30
JUL 7
JUL 14
JUL 21
JUL 28
AUG 4
AUG 11
AUG 18
AUG 25
SEP 1
SEP 8
SEP 15
SEP 22
SEP 29
OCT 6
OCT 13
OCT 20
OCT 27
NOV 3
NOV 10
NOV 17
NOV 24
DEC 1
DEC 8
DEC 15
DEC 22
DEC 29
JAN 5
JAN 12
JAN 19
JAN 26
FEB 2
FEB 9
FEB 16
FEB 23
MAR 2
MAR 9
MAR 16
MAR 23
MAR 30
APR 6
APR 13
APR 20
APR 27
MAY 4
MAY 11
MAY 18
MAY 25
JUN 1
JUN 8
JUN 15
JUN 22
JUN 29
JUL 6
JUL 13
JUL 20
JUL 27
AUG 3
AUG 10
AUG 17
AUG 24
AUG 31
SEP 7
SEP 14
SEP 21
Jul 11, 2026
Starts With A Bang #131 - The Baryon Life Cycle
41:27
41:41
41:46
41:57
42:04
E
40:59EthanHOST
Can you paint us a picture of how we think this works based on observations in dwarf galaxies? And then as a follow-up, can you tell us what that implies for either Milky Way-like analogs in the early universe or the modern galaxies that we see in our local vicinity today?

Ava PolzinGUEST
I think, you know, as I was sort of mentioning earlier, and I think is kind of a common pitfall when people are just thinking about space or any topic in science, really, we tend to think about these things as isolated.

Ava PolzinGUEST
But really, when we're talking about any type of object, it exists within some larger system.

Ava PolzinGUEST
And so the baryon cycle is is what we call the larger system that kind of governs the evolution of normal matter in these galaxies.

Ava PolzinGUEST
And it really doesn't exist in isolation from the star formation we were discussing or the mass we were discussing or the environment we were discussing.

Ava PolzinGUEST
So in the sort of simplest picture of star formation or the baryon cycle and the way that I often start to introduce it, whether I'm talking to students or even giving a talk to other scientists, Really, when we're thinking about star formation, stars in principle want to form as long as gas is sufficiently cold and dense.
35 MINS LATER
E
77:48EthanHOST
It seems like there are some very key wavelengths that you need to look in as far as the information you're, you know, trying to get out of these dwarf galaxies that are that are either forming new stars or that form new stars at some point in the past, or that have their gas distributed a certain way, in motion a certain way, if you want to probe the circumgalactic medium, how important is it to have sort of this pan-wavelength coverage? And are there observatories that you think to yourself, whew, if we built this type of observatory that was good at taking this class of observations in this wavelength range, we could really answer a profound set of questions or solve a profound set of puzzles that basically has you intellectually salivating for that type of data.