Table A.3
Description of selected columns from the PHANGS-MUSE/HST Hα Nebulae Catalogue (part II, continued).
| Column | Description |
|---|---|
| bpt_nii_muse | BPT class using [N II]/Hα (PHANGS-MUSE) |
| bpt_sii_muse | BPT class using [S II]/Hα (PHANGS-MUSE) |
| bpt_oi_muse | BPT class using [O I]/Hα (PHANGS-MUSE) |
| halpha_lum | Hα luminosity from HST (erg/s) |
| halpha_lum_err | Uncertainty on HST Hα luminosity (erg/s) |
| halpha_lum_muse | Hα luminosity from PHANGS-MUSE (erg/s; PHANGS-MUSE) |
| hii_class_v2_muse | PHANGS-MUSE H II classification (v2; PHANGS-MUSE) |
| hii_class_v3_muse | PHANGS-MUSE H II classification (v3; PHANGS-MUSE) |
| te_nii_muse | Electron temperature from [N II] (K; PHANGS-MUSE) |
| te_nii_err_muse | Uncertainty on Te([N II]) (K; PHANGS-MUSE) |
| te_siii_muse | Electron temperature from [S III] (K; PHANGS-MUSE) |
| te_siii_err_muse | Uncertainty on Te([S III]) (K; PHANGS-MUSE) |
| ne_sii_muse | Electron density from [S II] 6716/6731 (cm−3; PHANGS-MUSE) |
| ne_sii_err_muse | Uncertainty on ne([S II]) (cm−3; PHANGS-MUSE) |
| q | Ionizing photon rate Q (s−1) |
| q_err | Uncertainty on Q (s−1) |
| logq_d91_muse | log10(ionization parameter) (PHANGS-MUSE) |
| logq_d91_err_muse | Uncertainty on log10(ionization parameter) (PHANGS-MUSE) |
| ebv_muse | Colour excess E(B-V) from Balmer decrement (mag; PHANGS-MUSE) |
| ebv_err_muse | Uncertainty on E(B-V) (mag; PHANGS-MUSE) |
| av_muse | Visual extinction AV (mag; PHANGS-MUSE) |
| metallicity_scal_muse | Gas-phase metallicity (Scal code; PHANGS-MUSE) |
| metallicity_scal_err_muse | Uncertainty on metallicity (Scal; PHANGS-MUSE) |
| metallicity_scal_delta_muse | Offset from local metallicity trend (dex; PHANGS-MUSE) |
| age_assoc_<filter>_<scale> | Stellar association age (Myr; PHANGS-HST) |
| age_err_assoc_<filter>_<scale> | Uncertainty on association age (Myr; PHANGS-HST) |
| ra_assoc_<filter>_<scale> | Association right ascension (deg; PHANGS-HST) |
| dec_assoc_<filter>_<scale> | Association declination (deg; PHANGS-HST) |
| ebv_assoc_<filter>_<scale> | Colour excess E(B–V) (mag; PHANGS-HST) |
| ebv_err_assoc_<filter>_<scale> | Uncertainty on E(B–V) (mag; PHANGS-HST) |
| mass_assoc_<filter>_<scale> | Stellar mass (M⊙; PHANGS-HST) |
| mass_err_assoc_<filter>_<scale> | Uncertainty on stellar mass (M⊙; PHANGS-HST) |
| region_ID_assoc_<filter>_<scale> | Association identifier (PHANGS-HST) |
| flag_multi_assoc_<filter>_<scale> | Flag: multiple matched associations (PHANGS-HST) |
| flag_one_assoc_<filter>_<scale> | Flag: exactly one matched association (PHANGS-HST) |
| flag_none_assoc_<filter>_<scale> | Flag: no matched association (PHANGS-HST) |
Notes. This table provides additional parameters, including luminosities, physical conditions, ionisation properties, and stellar association matches. Together with Table A.2, this forms a full overview of the catalogue description. Columns related to stellar associations follow a repeated naming pattern. The format is <quantity>_assoc_<filter>_<scale>, where <filter> indicates the photometric band used for association identification (nuv = near-ultraviolet; v = optical V-band), and <scale> specifies the physical association scale in parsecs (08pc, 16pc, 32pc, 64pc). For example, age_assoc_nuv_08pc denotes the age of the stellar association identified in the NUV at an 8 pc scale, while mass_assoc_v_32pc would give the stellar mass of the V-band association at a 32 pc scale.
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