Sentences with phrase «luminosity from»

This is shown, among others, by the sunspot data (Fig. 1) as well as measurements of the solar luminosity from satellites (Fig. 2).

The kitchen is fully equipped for the modern chef, while the interior dining room offers a lovely setting for classic Mexican feasts, with a circular wooden table, high ceilings, and an enchanting luminosity from its ample windows and wrought - iron chandelier.

A matte foundation or powder will just cover any glow or luminosity from the primer.

We believe in creating beauty that lasts, that will stand the test of time, with ingredients that nourish, protect, and enhance our luminosity from the inside out.

The EUV Luminosity from Young Cool Stars: Implications for the Dispersal of Protoplanetary Material

Title: The EUV Luminosity from Young Cool Stars: Implications for the Dispersal of Protoplanetary Material Abstract: We present a new method to estimate the maximum ionizing (13.6 - 100eV) luminosity reaching the surface of protoplanetary disks around Cool Stars.

The sources photometrically identified as Class I are confirmed as objects dominated by accretion luminosity from dense envelopes, with accretion rates 1e - 5 to 1e - 6 Msun / yr.

[17] The star is radiating 1.5 [10] times the Sun's luminosity from its photosphere at an effective temperature of 6,149 K. [11]

Not exact matches

Bottom Line: The Luminosity baby bouncer from Fisher - Price is ideal for parents on the go who need a lightweight bouncer.

Since Hubble's guess that every star has the same luminosity is not strictly true, to chart the universe's expansion astronomers needed more reliable cosmic candles — celestial objects that they could trust to burn with the same luminosity no matter how far from Earth.

Many old stars, they say, show symptoms of indigestion from having gobbled up planets: bloating, unusually large infrared luminosity, and excess lithium.

Over the past decade, researchers have carefully calibrated the intrinsic luminosity of type Ia supernovae, so the distance to one of these explosions can be determined from its apparent brightness.

Crucially, Kepler also detected a slight dip in luminosity, much less dramatic than the dimming associated with the planet passing in front of the star, when HAT - P - 7 b passed behind its star — the spacecraft was seeing only the star's light, without the reflection and glow from the exoplanet.

«Not only does this star have the high velocity expected if it is recoiling from a supernova explosion, but the combination of its low mass, high luminosity and carbon - rich composition appear impossible to replicate in a single star — a smoking gun that shows it must have originally formed with a binary companion,» adds Ben Ritchie (Open University), a co-author on the new paper.

This period - luminosity relationship can be used to deduce the distance of a star from its period of variation and its apparent brightness.

Now, monitoring the pulsations of similar variables in other galaxies, we can readily calculate the stars» luminosity and thus their distance from us.

Joseph Kable at the University of Pennsylvania and his colleagues have tested the popular Luminosity brain - training program from Lumos Labs in San Francisco, California, against other computer games and found no evidence that it is any better at improving your thinking skills.

The quasar, with its central black hole mass of 12 billion solar masses and the luminosity of 420 trillion suns, is at a distance of 12.8 billion light - years from Earth.

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.

Early results from the Satellites Around Galactic Analogs (SAGA) Survey indicate that the Milky Way's satellites are much more tranquil than other systems of comparable luminosity and environment.

According to various estimates, the star has about 1.7 times Sol's mass (RECONS), 1.8 times its equatorial diameter (JPL press release, 2001; T. Moon, 1985; Morossi and Malagnini, 1985, page 369; and Johnson and Wright, 1983, page 695), and about 10.7 times its visual luminosity and 9.845 its bolometric luminosity (NASA Star and Exoplanet Database, derived from of Kenneth R. Lang, 1980).

Unlike the low luminosity of the objects she studies, Dr. Marla Geha from Yale University shines brightly in this talk describing research in action at the W. M. Keck Observatory.

Star A's late spectral type and dim luminosity puts it possibly close to the lower limit of habitability for (multicellular) Earth - type plant and animal life, given the redness of its light and the increased risk of tidal locking from the closeness of the orbit necessary for liquid water on a planetary surface.

This diagram is a plot of luminosity (absolute magnitude) against the colour of the stars ranging from the high - temperature blue - white stars on the left side of the diagram to the low temperature red stars on the right side.

This diagram below is a plot of 22000 stars from the Hipparcos Catalogue together with 1000 low - luminosity stars (red and white dwarfs) from the Gliese Catalogue of Nearby Stars.

This cool and dim, main sequence red dwarf (M1.5 Vne) may have about 37.5 to 48.6 percent of Sol's mass (Howard et al, 2014; RECONS; and Berger et al, 2006, Table 5, based on Delfosse et al, 2000), 34 to 39 percent of its diameter (Howard et al, 2014), and some 2.2 percent of its luminosity and 2.9 percent of its theoretical bolometric luminosity (Howard et al, 2014), correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 1980).

It appears to be a main sequence red dwarf star of spectral and luminosity type M4.5 V. Because of its small mass and great distance from the primary (Star A), Upsilon Andromedae B appears to have a negligible effect on the radial velocity measurements used to determine that Star A has at least three large planets (Lowrance et al, 2002).

u «The masses of these early black holes are inferred from their [quasar] luminosities to be > 109 solar masses, which is a difficult theoretical challenge [for the big bang theory] to explain.»

Estimating distance from luminosity requires a model for the distribution of dust in the Milky Way and this distribution (especially in the spiral arms) is not simple.

An elliptical galaxy's luminosity can be found from the velocity dispersion of the stars in the central few kiloparsecs of the galaxy.

In 2006, astronomers discovered a very dim («mid-range»), red dwarf companion to HD 189733 A of spectral and luminosity type M V. Observed at a separation of 216 AUs from Star A, the companion star has a clockwise orbit that is nearly perpendicular to the orbital plane of transiting planet b around Star A (HD 189733 b or Ab).

With a visual luminosity that has reportedly varied between 0.000053 and 0.00012 of Sol's (based on a distance of 4.22 light - years) the star is as much as 19,000 times fainter than the Sun, and so if it was placed at the location of our Sun from Earth, the disk of the star would barely be visible.

The mass distribution inferred from the kinematics is slightly more extended than, though not strongly inconsistent with, the luminosity distribution.

After analyzing data from the Kepler Space Telescope, scientists discovered huge dips in KIC 8462852's brightness that lasted between five and 80 days, with the star sometimes losing as much as 20 percent of its luminosity.

It has about 12 to 13 percent of Sol's mass (Delfosse et al, 2000; RECONS; Torres et al, 1999; and NASA Star and Exoplanet Database, interpolated from McCarthy and Henry, 1993), with about 14 percent of its diameter but only 8/100, 000 th of its luminosity.

It may have around 85 percent of Sol's mass (Howard et al, 2010, for HD 97658 on Table 1, page 3), 73 percent of its diameter (Howard et al, 2010, for HD 97658 on Table 1, page 3), and 34 percent of its bolometric luminosity (Howard et al, 2010, for HD 97658 on Table 1, page 3; and the NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980).

This is not because they are unusually small, but instead comes from their smaller radii and lower luminosity as compared to the other main category of stars, the giant stars.

61 Virginis is a yellow - orange main sequence dwarf of spectral and luminosity type G5 - 6 V, with about 92 to 96 percent of Sol's mass (95 percent using the isochrone mass estimate of Valenti and Fischer, 2005; and NASA Star and Exoplanet Database, based on David F. Gray, 1992), 94 to 98 percent of its diameter (96 percent for Valenti and Fischer, 2005; Johnson and Wright, 1983, page 677; and NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980), and around 78 percent of its visual luminosity and nearly 81 percent of its theoretical bolometric luminosity, with infrared radiation (Sousa et al, 2008; Valenti and Fischer, 2005; NASA Star and Exoplanet Database, based on Kenneth R. Lang, 1980).

Estimates provided by the NASA Star and Exoplanet Database — where the inner edge of BD +26 2184's habitable zone could be located at around 0.517 AUs from the star and its center around 0.764 AU, while the outer edge lies farther out at around 1.016 AUs — appear to be somewhat high based on the star's significantly sub-Solar luminosity.

The luminosity class ranged from I to V, in order of decreasing luminosity.

Based on its estimated bolometric luminosity, the distance from HR 4523 A where an Earth - type planet would be «comfortable» with liquid water is centered around 0.88 AU — between the orbital distance of Venus and Earth in the Solar System, with an orbital period about 330 days, or about 90 percent of an Earth year.

The star has almost a half (48 to 49 percent) of Sol's mass (Zechmeister et al, 2009, from Delfosse et al, 2000; and NASA Star and Exoplanet Database, derived from Henry and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; and Johnson and Wright, 1983, page 673), and percent of its visual and around 3.3 + / - 0.2 of its bolometric luminosity and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980).

Only one 22 GHz water maser was detected in IC 1396A; its infrared counterpart has luminosity < 0.1 Lsun, the first H2O maser from such a low - luminosity object.

We find that, for optically thick disks, CO inner radii are strongly correlated with the total system luminosity (stell... ▽ More We present an analysis of CO emission lines from a sample of T Tauri, Herbig Ae / Be, and transitional disks with known inclinations, in order to study the structure of inner disk molecular gas.

In X-rays TYC 8241 2652 1 has all properties expected from a young star: Its luminosity is in the saturation regime and the abundance pattern shows enhancement of O / Fe.

70 Virginis is a yellow - orange main sequence dwarf star of spectral and luminosity type G5 Va, but has been previously classified from G2.5 to G4.

The star has about 70 to 77 percent of Sol's mass (RECONS; and NASA Star and Exoplanet Database, interpolated from David F. Gray, 1992), 68 to 76 percent of its diameter (Johnson and Wright, 1983, page 701; and NASA Star and Exoplanet Database, derived using the power law formula from Kenneth R. Lang, 1980), and about 14.7 percent of its visual luminosity and 20.4 percent of its theoretical bolometric luminosity, correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 1980).

In practice there is a range of luminosities for the Type Ia, but the luminosity can be derived from the rate at which the supernova brightens and then fades — the more luminous ones take longer to brighten and then fade.

Lacaille 9352 may have 50 to 58 of Sol's mass (Demory et al, 2009, Table 4; RECONS; and NASA Star and Exoplanet Database, interpolation table of Henry and McCarthy, 1993), less than half (43 to 46 percent) of its diameter (Demory et al, 2009, Table 4; and NASA Star and Exoplanet Database, derived from the power law formula of Kenneth R. Lang, 1980), 1.1 percent of its visual luminosity and 3.5 percent of its bolometric luminosity (NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980), and only about one tenth to 60 percent of Sol's abundance of elements heavier than hydrogen («metallicity»)(Demory et al, 2009, Table 4).

The estimated black body temperatures from the 100 and 160 micron fluxes are $ \ lesssim $ 22 K, while the fractional luminosity of the cold dust is Ldust / Lstar ~ 10E - 6, close to the luminosity of the Solar - System's Kuiper belt.