visual luminosity造句

• It has an estimated visual luminosity of 61 % of Sol.
• This corresponds to a visual luminosity 9.2 times greater than that of the Sun.
• This helps to explain the high mass and visual luminosity for an O9.5 star at this distance.
• Its effective temperature is 3, 100 kelvins, and it has a visual luminosity of 0.0004 solar luminosities.
• For very hot and very cool stars, the bolometric luminosity is dramatically higher than the visual luminosity, sometimes several magnitudes or a factor of five or more.
• From the apparent magnitude and distance, astronomers have estimated an effective temperature of 3200 K and a visual luminosity of 0.2 percent of that of the Sun.
• The energy output from the mass flow onto this accretion disk is actually the primary contributor to the visual luminosity of this system; outshining both of the white dwarfs.
• But the characteristics in star tables on our pages use the other figure and say " luminosity ", not " visual luminosity ", which strikes me as an error.
• The most common type shows a distinctive " plateau " in the light curve shortly after peak brightness where the visual luminosity stays relatively constant for several months before the decline resumes.
• The cores of these stars are much larger than any white dwarf and the amount of radioactive nickel and other heavy elements ejected from their cores can be orders of magnitude higher, with consequently high visual luminosity.
• A more common method is to measure the visual luminosity and apply a bolometric correction to give the total luminosity at all wavelengths, although the size of the bolometric correction is extremely sensitive to the effective temperature.
• The primary star of the system ( component A ) is an orange dwarf star that may just have over three fourths the mass of the Sun, about 77 percent of its radius, and only 15.6 percent of its visual luminosity.
• Because a larger portion of that output is in the infrared, Barnard's star's visual luminosity is even lower & mdash; 0.04 % that of the Sun . talk ) 17 : 37, 16 September 2006 ( UTC)
• I added the following to Barnard's star yesterday : It has a " visual luminosity just 4 / 10000 of solar, corresponding to a bolometric or absolute luminosity of 3.46 / 1000 . " This is based on this and this paper within it.
• The temperature drops until the wind opacity starts to decrease, meaning all LBV outbursts reach a temperature around 8, 000 9, 000 K . The bolometric luminosity during outbursts is considered to remain largely unchanged, but the visual luminosity increases as radiation shifts from the ultraviolet into the visual range.
• Alpha Centauri A ( ? Cen A ) has 1.1 times the mass and 1.519 times the luminosity of the Sun, while Alpha Centauri B ( ? Cen B ) is smaller and cooler, at . 907 times the Sun's mass and . 445 times its visual luminosity.
• Kinetic energies and nickel yields are somewhat lower than Type Ia supernovae, hence the lower visual luminosity of supernovae, but energy from the de-ionisation of the many solar masses of remaining hydrogen can contribute to a much slower decline in luminosity and produce the plateau phase seen in the majority of core collapse supernovae.
• Like the primary, the secondary star Gliese 667 B ( GJ 667 B ) is a K-type main-sequence star, although it has a slightly later stellar classification of K5V . This star has a mass of about 69 % of the Sun, or 95 % of the primary's mass, and it is radiating about 5 % of the Sun's visual luminosity.