DESI Epoviz to MaNGA Population Cell Join

Status: COARSE_CELL_PRIOR

Decision: ADMIT_COARSE_CELL_PRIOR_HOLD_OBJECT_CROSSMATCH

This note uses the DESI EDR epoviz visualization/outreach VAC as a lightweight population prior and compares it with the local MaNGA stellar-gas grouping study by shared sky/redshift cells.

Claim boundary: this is not an object-level crossmatch, not a direct gas-density map, and not a cosmology fit. It is a population-shape prior for deciding where the stellar-gas model has local support and where it should stay in HOLD.

Source

DESI EDR epoviz CSV: shared-data/artifacts/stellar_gas_observation/desi_epoviz/EDR-Viz-Outreach-VAC.csv.gz
DESI source hash: 83a4c4c4c4e8eb309e6a71459b3e6087113b82ef03edeeb09752ce368443b6d6
DESI documentation: https://data.desi.lbl.gov/doc/releases/edr/vac/epoviz/
MaNGA grouping study: shared-data/data/stellar_gas_observation/stellar_gas_population_grouping_study.json

DESI Population

Rows read: 669377

Tracer counts:

BGS: 228630
ELG: 261489
LRG: 125174
QSO: 54084

Local redshift bins used for MaNGA overlap:

z_000_002: 580
z_002_004: 4313
z_004_006: 3729
z_006_008: 7017
z_008_plus: 653738

Redshift summary:

{
  "count": 669377,
  "min": 0.010233,
  "max": 3.499648,
  "mean": 0.765852
}

Coarse Join

Join key:

raXX_north_or_south__z_000_002/z_002_004/z_004_006/z_006_008/z_008_plus

Joined cells: 25 out of 56 MaNGA cells.

Top joined cells:

ra03_north__z_008_plus: DESI 315331, MaNGA 305, shock proxy 0.918033
ra04_north__z_008_plus: DESI 181621, MaNGA 219, shock proxy 0.922374
ra02_north__z_008_plus: DESI 44035, MaNGA 364, shock proxy 0.881868
ra03_north__z_002_004: DESI 2439, MaNGA 1622, shock proxy 0.676326
ra03_north__z_006_008: DESI 3456, MaNGA 374, shock proxy 0.754011
ra04_north__z_002_004: DESI 1177, MaNGA 960, shock proxy 0.60625
ra03_south__z_008_plus: DESI 100231, MaNGA 8, shock proxy 1.0
ra03_north__z_004_006: DESI 1401, MaNGA 531, shock proxy 0.572505

Holds

HOLD_OBJECT_LEVEL_CROSSMATCH
HOLD_DIRECT_GAS_DENSITY_INFERENCE
HOLD_SELECTION_FUNCTION_FIT
HOLD_COSMOLOGY_FIT

Receipt Backlinks

Receipt: shared-data/data/stellar_gas_observation/desi_epoviz_manga_population_cell_join_receipt.json
Data: shared-data/data/stellar_gas_observation/desi_epoviz_manga_population_cell_join.json
Tiddler: 6-Documentation/tiddlywiki-local/wiki/tiddlers/DESI Epoviz MaNGA Population Cell Join.tid

2.5 KiB Raw Blame History