Period-luminosity relations of SX Phoenicis stars

Details Period-luminosity relations of SX Phoenicis stars Period-luminosity relations of SX Phoenicis stars

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109.1751m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 109, no. 4, p. 1751-1756

Astronomy and Astrophysics

Astronomy

35

Dwarf Galaxies, Galactic Clusters, Periodic Variations, Stellar Luminosity, Variable Stars, Correlation, Distance, Harmonics, Light Curve, Metallicity, Stellar Oscillations

Scientific paper

We propose the following criteria to distinquish between fundamental (F) and first-overtone (H) pulsating SX Phoenicis variables: the (H) pulsators are SX Phe stars with nearly symmetrical light curves and light amplitudes (total range) less than or equal to 0.29 m in V; the (F) pulsating stars have light amplitudes greater than or equal 0.25 m in V and asymmetrical light curves. These criteria provide a separation of the stars into two groups that lead to two parallel P - L relations that are offset by 0.37m. This offset is in excellent agreement with the offset, 0.36m predicted from the double-mode pulsating variable SX Phe. The (H) pulsating variables have shorter periods on average than the (F) pulsators as predicted by P1/ P0 = Q1/ Q0 approximately equal 0.778. The mean periods of the SX Phe stars in globular clusters are shown to be correlated with the metallicity (Fe/H) in the sense that the shortest period variables are found in the most metal-poor clusters. The fundamental-mode SX Phe stars in the Carina dwarf galaxy give a distance modulus of 20.0 and (Fe/H) = -1.5.

Affiliated with

Also associated with

No associations

Rating

Period-luminosity relations of SX Phoenicis stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Period-luminosity relations of SX Phoenicis stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Period-luminosity relations of SX Phoenicis stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1828031