RR Lyrae Stellar Spectra from Las Campanas Observatory, 2006-2014

Spectra of RR Lyrae variable stars obtained with the Las Campanas Observatory Du Pont Telescope and its echelle spectrograph, which has a spectral resolving power R ~= 27,000. The collection includes essentially all Du Pont spectra for this work collected between 2006 and 2014, led by George Preston and collaborators. Individual spectra have typical signal-to-noise values < 30 and are fully reduced on a laboratory wavelength scale.

Use Cases

• Analyzing stellar rotation and macroturbulence based on high-resolution echelle spectra.
• Calibrating metallicity estimates for field RR Lyrae stars based on spectral features.
• Studying radial velocity variations and phase smearing based on short integration times (< 900 sec).
• Investigating stellar atmospheric parameters using fully reduced spectra on a laboratory wavelength scale.

Strengths

• Spectra have a high spectral resolving power of R ~= 27,000.
• Data collection spans a defined time range from 2006 to 2014.
• Spectra are fully reduced and on a laboratory wavelength scale.
• Includes associated velocity data files with VREL, VOBS, and VHELIO values.

Limitations

• Row count and total number of spectra are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Individual spectra have low typical signal-to-noise values (< 30).

Provenance

Source

Las Campanas Observatory Du Pont Telescope and its echelle spectrograph.

Collection Method

Observational data collected for RR Lyrae research led by George Preston.

Time Range

2006-2014