Question
The number of satellites contained in these structures is strongly correlated with their concentration parameter, which normalizes the Navarro-Frenk-White density profile. For 10 points each:
[10m] Name these structures that contain the CGM, which strips satellites via ram pressure. Microlensing surveys have detected relatively few MACHOs in these regions.
ANSWER: galaxy halos [or galactic halos; or dark matter halos; accept Massive Compact Halo Objects; prompt on galaxies; prompt on overdense regions or overdensities]
[10h] The concentration parameter equals the ratio between a free parameter in the NFW profile and this physical quantity. The expansion of an overdensity is halted and reversed within the volume defined by this quantity.
ANSWER: virial radius [prompt on radius] (The free parameter is the scale radius.)
[10e] The NFW profile gives an expression for the density of this type of matter. The amount of a galaxy’s mass stored in this type of matter is typically much larger than the amount stored in baryons.
ANSWER: dark matter
<Science - Other Science - Astronomy>
Summary
| 2024 ARGOS @ Brandeis | 03/22/2025 | Y | 3 | 6.67 | 67% | 0% | 0% |
| 2024 ARGOS @ Christ's College | 12/14/2024 | Y | 3 | 10.00 | 67% | 33% | 0% |
| 2024 ARGOS Online | 03/22/2025 | Y | 3 | 13.33 | 100% | 33% | 0% |
Data
| I wish it were possible to freeze time so I would never have to watch you retire | throw away your cards, rally in the streets | 0 | 0 | 10 | 10 |
| Thompson et al. | CLEVELAND, THIS IS FOR YOU! | 10 | 0 | 10 | 20 |
| Aw we're so sorry to hear that maman died today, she gets five big booms | UBC | 0 | 0 | 10 | 10 |