For most objects, SDSS processing pipelines find estimates of the physical parameters most likely to have produced the observed spectrum. Many different estimates are available - the right one to use will depend on the problem at hand.
Click on the name of each set of estimates for more information on the pipeline that produced those estimates (opens in a new window). Most objects will have either estimated stellar parameters or galaxy properties, but a few objects will have both.
SEGUE Stellar Parameters Pipeline (SSPP)
| Targeting criteria | GAL |
|---|---|
| SEGUE flags | EnnnX |
| HAMMER spectral type | NA |
| Spectral subclass | SBT |
| Radial velocity (km/s) | -9999.0 |
| RV error | -9999.00 |
| Effective temp (K) | -9999 |
| Teff error | -9999 |
| [Fe/H] (dex) | -9999.0 |
| [Fe/H] error | -9999.00 |
| log10(g) (dex) | -9999.0 |
| log10(g) error | -9999.00 |
APOGEE Stellar Parameters and Chemical Abundances Pipeline (ASPCAP)
Model Fitting: Portsmouth group (Spectro-photometric matching)
No data found for this object
No data found for this object
Stellar Kinematics: Portsmouth group (Emission Line Fluxes)
No data found for this object
Wisconsin group (Principal Component Analysis)
Assuming model spectra from Bruzal & Charlot (2003)
No data found for this object
Assuming model spectra from Maraston & Strömback (2011)
No data found for this object
Granada group (Flexible Stellar Population Synthesis)
Early Galaxy Formation,Dust Attenuation
No data found for this object
Early Galaxy Formation,No Dust Attenuation
No data found for this object
Wide Range of Formation Times, Dust Attenuation
No data found for this object
Wide Range of Formation Times,No Dust Attenuation
No data found for this object