Sentences with phrase «times solar luminosity»

Not exact matches

RR - Lyrae have the same time - averaged luminosity (about 49 solar luminosities or an absolute magnitude MV = +0.6).

A comparison of its luminosity to the values predicted by theoretical evolutionary models suggests that the substellar object has a mass of 0.051 + / - 0.014 Solar - masses, or around 50 times Jupiter's mass in a range between 22 and 57 Jupiter - masses (Luhman et al, 2006; and Mugrauer et al 2006).

NASA, Chandra X-Ray Observatory — ring and larger images (more) Magnetic field interactions between giant stars Aa and Ab are thought to energize the corona of the larger star (Aa), generating more x-rays than would be expected for a single star (more) and creating an x-ray luminosity that is 10,000 times that of the Solar corona.

It has the same mass as Sol (Bedding et al, 1996, page 1157)-- possibly 1.1 Solar - mass according to Professor Kaler's Mu Herculis page, about 1.77 to 1.86 times Sol's diameter, and about 2.2 to 2.7 (with infrared) times its luminosity.

It may be as massive as (or slightly more so than) Sol, with about the same diameter — 1.03 to 1.05 percent Solar (Johnson and Wright, 1983, page 683; and Hill et al, 1989) and around 1.14 times its luminosity.

In providing answers, Kasting explains why Earth has remained habitable despite a substantial rise in solar luminosity over time, and why our neighbors, Venus and Mars, haven't.

The peak absolute luminosity appears to be about 50,000 times the luminosity of the Sun, but the largest percentage of known open clusters has a brightness equivalent to 500 solar luminosities.

It probably has around 1.68 to 1.71 (+ / - 0.013) times Sol's diameter (Kervalla et al, 2003; and Gatewood and Gatewood, 1978), although the NASA Star and Exoplanet Database derived 1.80 + / -0.05 Solar - masses based on luminosity, using Kenneth R. Lang, 1980).

The artist David Salle has written that Eric Freeman's paintings «have the luminosity associated with a solar event, the energy of an explosion» but at the same time «a delicacy, a softness... that convinces us to lower our guard.»

However the problem can be resolved by bringing in modellers who can lower your CO2 at the appropriate times and appealing to lower solar luminosity.

What has diverged for a longer time period and to a greater degree than anytime in the last 1150 years according to proxy data is solar luminosity and global temperatures.

Since decreased solar luminosity at that time only partially offset increased radiative forcing from CO2, some other factor needs to be considered to explain the glaciation.»

A CO2 threshold of below ~ 500 ppm is suggested for the initiation of widespread, continental glaciations, although this threshold was likely higher during the Paleozoic due to a lower solar luminosity at that time.

But once you took all of this into account, you might as well throw in the carbon cycle, vegetation (albedo), soil (albedo), cloud formation (albedo, etc.), evaporation from soil, the spectra for the sun and its luminosity, solar cycles, and once you do that you pretty much have the entire climate model, including how it evolves over time — or there abouts.

As solar luminosity gradually increased through time, concentrations of greenhouse gases would have to have been much higher than today.