Sentences with phrase «radial velocity variations»

[1] Most of the exoplanets currently known were discovered using indirect techniques — such as radial velocity variations of the host star, or the dip in brightness of the star caused by a transiting exoplanet.

The primary shows long - period radial velocity variations that indicate the presence of a low mass companion whose projected mass is in the planetary regime (m sin i = 9.33 Mjup).

This so - called radial velocity variation is what astronomers often measure to find exoplanets.

Found via radial velocity variations, the planet's true mass could not be known with knowing whether its orbit around Star B is being viewed edge - on, face - on, or somewhere in between.

However, the high luminosity of the primary star, intense Ca II H and K emission (Smith and Dominy, 1979), and radial velocity variations somewhat larger than can be accounted for by the expected uncertainties suggested that Delta Eridani might be an RS CVn - type binary and therefore a photometric variable like most members of that class.

Analysis of radial velocity variations suggest that this probable red dwarf star has about 15 percent of Sol's mass (Irwin et al, 1992).

This result was unexpected because no companion had been reported previously and because the star's previously known characteristics (such as observed radial velocity variations) were incompatible with Arcturus as a binary system (R. F. Griffin, 1998).

Scientists were also able use the infrared spectroscopy to look at radial velocity variations (an analysis of the light spectrum) to determine that water was present.

Within two days, however, the discovery announcement was retracted because the detected radial velocity variations could be attributed to the aging star's pulsations (more).

Radial velocity variations have been detected (Andrei A. Tokovinin, 1992).

In addition, Tau Ceti does not appear to have a close stellar or substellar companion based on astrometric measurements (Lippincott and Worth, 1980), radial velocity variations (Campbell et al, 1988; and near - infrared interferometry (Di Folco et al, 2007).

These signs were either radial velocity variations (1 star), Hα line profile variability (2 stars), double - lined profiles (9 stars) or visual binarity seen in the slit viewer images (4 stars).

The discovery has yet to be confirmed, and some astronomers suspect that the radial velocity variations may actually reflect a long - term oscillation in Star A itself.