Sentences with phrase «luminosity relation»

Further on there is the well known mass - luminosity relation for stars.

A proposal for a physical mechanism based on the mass - luminosity relation (PDF), Nicola Scafetta, 06/2012, Journal of Atmospheric and Solar - Terrestrial Physics, Volumes 81 — 82, pp. 27 - 40.

A proposal for a physical mechanism based on the mass - luminosity relation.

The YSO mass function (MF), constructed using a theoretical mass - luminosity relation, shows peaks at substellar (~ 0.08 - 0.18 Msolar) and intermediate (~ 1 - 1.78 Msolar) mass ranges for the IRS 1 - 3 region.

Henrietta Leavitt's original paper (pdf file freely available) on the Period - Luminosity Relation was published on March 3rd 1912 in a Circular of the Harvard College Observatory.

This has become known as the Period - Luminosity relation.

With the Hubble Space Telescope, astronomers were able to use the Cepheid period - luminosity relation out to distances ten times further than what could be done on the ground.

Not exact matches

Another dynamical complication comes from the so - called Tully - Fisher relationship, which describes the relation between a galaxy's luminosity and its rotation velocity: the higher the luminosity, the faster a galaxy rotates.

In 1977 Brent Tully and Richard Fisher discovered a similar relation between the rotational velocity of the disk and the luminosity of a spiral galaxy.

The Tully - Fisher relation for the infrared luminosity is: circular velocity = 220 × (L / L *) 0.22.

Sandra Faber and Robert Jackson discovered in 1976 a simple relation between the spread of velocities (called the velocity dispersion) and the luminosity of elliptical galaxies.

We measure equivalent widths of spectral features, derive calibration relations using stars with interferometric measurements, and estimate stellar radii, effective temperatures, masses, and luminosities for the K2 planet hosts.