Sentences with phrase «luminosity by»

Possibly in keeping with its relative youth compared to Sol's 4.6 billion years, Star A has a faster rotation of 13.4 days (Knutson et al, 2007; and Noyes et al, 1984) compared with Sol's 25.4 days, with more chromospheric activity including starspots large and widespread enough to affect its luminosity by about + / - 1.5 percent in visible light (Knutson et al, 2007).

The imaging data demonstrated that these sources are strongly lensed by foreground galaxies, which increases their apparent luminosities by a factor of ~ 10, which translates to a savings in telescope time of ~ 100, and allows such distant and intrinsically faint objects to be more easily detected.

Not exact matches

Observations of young stars that are still surrounded by their gas disks demonstrate that those similar in size to our own Sun often undergo periodic explosive bursts, about 100 years in duration, during which the star's luminosity increases.

Luminosity describes how much light is emitted by a source in all directions.

Here, by carrying out a series of simulations of stellar magnetic fields, Antoine Strugarek and colleagues show that the Sun's magnetic cycle depends on its rotation rate and luminosity.

To take advantage of this simple fact requires finding astronomical objects that have a known intrinsic luminosity — the amount of radiation per second produced by the object — and that can be seen across the universe.

Shock breakout is followed by a long «plateau» phase of almost constant luminosity lasting several months, before a slow exponential decay.

Similar to all supernovae, the luminosity of metal - poor supernovae show a characteristic rise to a peak brightness followed by a decline.

Once confirmed, a transit allows astronomers to confidently measure a planet's orbital period — its year — as well as to estimate its size, by comparing the depth of its shadow with the estimated dimensions and luminosity of its star.

«Despite the fact, that the difference between the maximal and minimal luminosity is measured by tens of percents, and now it is nearly a hundred times!

Vega may also have 2.73 + / - 0.01 times its diameter (Aufdenberg et al, 2006; and Ciardi et al, 2001) and 37 + / - 3 times (true A0V average derived by Aufdenberg et al, 2006) to 58 times (pole on) its luminosity.

This paper nicely complements the official papers by the LIGO / Virgo gravitational wave detector team and the NASA's Fermi Gamma - Ray Telescope team by studying the luminosity function of short GRBs as well as the possible physical mechanism that powers this unique event.

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).

Discovered to be a faint companion of Stars Aab by Ragnar Furuhjelm, Capella C is a red dwarf star of spectral and luminosity type M1 V.

Of the red stars observed by Hertzsprung, the dwarf stars also followed the spectra - luminosity relationship discovered by Russell.

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.

Despite its diminutive size, it is ten times more sensitive than the Hubble Space Telescope in detecting the minuscule variations in a star's luminosity caused by vibrations that shake its surface.

Barnard's Star is of a variable category known as BY Draconis, stars that show starspots, variations in luminosity and other activity.

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.

Between 2008 and 2010 the mid-IR luminosity of this system dropped dramatically by at least a factor of 30 suggesting a loss of dust mass of an order of magnitude or more.

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.

Because the luminosity = the energy / time, the apparent brightness will be reduced enough by the expansion to make the sky dark.

Due to the lack of sensitivity of past and current infrared (IR) instrumentation, so far it has not been possible to get a glimpse into the earl... ▽ More Our current knowledge of star formation and accretion luminosity at high - redshift (z > 3 - 4), as well as the possible connections between them, relies mostly on observations in the rest - frame ultraviolet (UV), which are strongly affected by dust obscuration.

Examples of science projects enabled by the data in the High - Latitude Survey include: mapping the formation of cosmic structure in the first billion years after the Big Bang via the detection and characterization of over 10,000 galaxies at z > 8; finding over 2,000 QSOs at z > 7; quantifying the distribution of dark matter on intermediate and large scales through lensing in clusters and in the field; identifying the most extreme star - forming galaxies and shock - dominated systems at 1 < z < 2; carrying out a complete census of star - forming galaxies and the faint end of the QSO luminosity function at z ~ 2, including their contribution to the ionizing radiation; and determining the kinematics of stellar streams in the Local Group through proper motions.

They also have other characteristics that indicate the excess, and sometimes brief, luminosity is not produced by stars.

We show that the EUV luminosity reaching the disk is below the range of inferred stellar EUV luminosities, by more than an order of magnitude for the older sources in our sample.

Abstract: Our current knowledge of star formation and accretion luminosity at high - redshift (z > 3 - 4), as well as the possible connections between them, relies mostly on observations in the rest - frame ultraviolet (UV), which are strongly affected by dust obscuration.

We measure the radial profile and fractional luminosity of the disc, and compare the values to those of discs around stars of similar age and / or spectral type, placing this disc in context of other resolved discs observed by Herschel / DUNES.

The goal this year is to reach an integrated luminosity of around 25 fb - 1, up from the 4 fb - 1 it reached by the end of last year.

Luminosity, in astronomy, the amount of light emitted by an object in a unit of time.

While the tremendous increase in luminosity is given by energy liberated by the explosion, its gradually fading light is fueled by radioactive cobalt decaying into iron.

Get creative by mixing it with your primer, liquid foundation or your choice of moisturizer to create overall luminosity on your skin.

Too Faced Candlelight Glow Highlighting Powder Duo in Warm Glow is the newest highlighting powder inspired by Too Faced's original Candlelight powder (in Rosy Glow), but this formula offers a more ethereal glow by using «Photolite» technology which diffuses harsh light, giving your skin a soft, youthful luminosity.

To mimic the luminosity of the center of the face, I started by applying a layer of MAC NW 10 concealer from MACs Pro Conceal and Correct Palette in «Light «(Review here).

Powered by tripleB complex, a proprietary blend of natural diamond powder, plants and lipoamino acids that diffuses light and minimizes the appearance of fine lines, wrinkles and pores while improving the appearance of skin luminosity.

Enriched with the stimulating power of Ruscus Extract, the anti-fatigue formula energizes skin by stimulating micro-circulation and targeting dullness to instantly improve skin brightness and luminosity.

Inspired by the vibrant beauty of precious gemstones, this collection embraces jewel - like luminosity and pearlescent luster.

Finish by using your smudger brush to add Rose Gold Luminizer to the center of your bottom lip, giving you a final touch of gilded luminosity to lips!

It's luminosity is only slight, making it a fabulous option for those who aren't keen on wearing foundation — wear it by itself or under foundation, either was, it's a superb way to add a fresh dewy look to your skin.

11 The photo - sensitive glass roof is dramatic and adds cabin luminosity unless it is opaqued by the driver.

Langdon Quin: I'm impressed by the luminosity and the intensity of light in lots of different kinds of painting.

A final treat anchored in the corners of the back gallery is a series of oil paintings by Adam Umbach, works that flirt with wistful nostalgia, painted with a technique and luminosity that draws inspiration from such varied artists as Gerhard Richter and Dan Flavin.

«The luminosity and depth of his work stands up to any Old Master or 19th Century Master that we have ever seen, but with an added modernity — employing the use of innovative materials and collage to tie it all together,» said gallerist Laura Grenning, who arranged the show by selecting works from private collections as well as those on loan from Marlborough Gallery.

But meander along the Grand Canal, and palazzo after palazzo drips with painting shows of supreme quality, their sensuous colour and luminosity enhanced by the watery setting, their ambition anchored by resonance with history.

And by the luminosity.

Her series Changing Luminosity was inspired by the play of light in the urban landscape - the flickering reflection of colourful fairground lights on rain washed surfaces, or the stark contrast of moving traffic lights, bouncing on windows and buildings, against the night sky.

Bound and sewn by hand in a limited edition, the book reminds us of the corporeity, luminosity, and balance of what resists and persists despite the test of time.

«Welling proclaims an unapologetic respect for the traditions of photography even as he pursues distinctly non-traditional ambitions... It is their utter lucidity, however, that makes these photographs so astonishing, a clarity of intention matched by a palpable luminosity.»

At times the optical effect created by the Day - Glo's luminosity is so jarring that the paintings almost hurt the eye.

Le Bassin aux Nymphéas (Water Lilies) is a classic example of the artist's preoccupation and fascination with the beautiful reflective luminosity of the water's surface accented by floating circular lily pads and surrounding fauna, according to information provided on the work.