Sentences with phrase «luminosity at»

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.

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.»

Tran has had numerous solo exhibitions both nationally and internationally, which include Adornment of Basic Space at Susanne Vielmetter Los Angeles Projects in Culver City, CA; Mind is a Pure Expanse of Space at Anthony Meier Fine Arts in San Francisco, CA; Luminosity at Cohan and Leslie, New York, NY; Tam Van Tran: Psychonaut at Blaffer Gallery, at The Art Museum of the University of Houston, Houston, TX; Cold Frost at the Irvine Fine Arts Center, Irvine, CA and SubUrban: Tam Van Tran at the Knoxville Museum of Art, Knoxville, TN, among others.

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.

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.

Not exact matches

Looking at stellar size and luminosity, they discovered that most nearby stars were created in two bursts — one 30 million years ago and the other less than 5 million years ago.

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.

There are two different black hole scenarios proposed to explain these objects: (1) they contain very «big» black holes that could be more than a thousand times more massive than the Sun (Note 1), or (2) they are relatively small black holes, «little monsters» with masses no more than a hundred times that of the Sun, that shine at luminosities exceeding theoretical limits for standard accretion (called «supercritical (or super-Eddington) accretion,» Note 2).

But it doesn't have the energy and luminosity to study the full range and probably the Higgs will be discovered at CERN.

«For about three minutes after the BAT trigger, the superflare's X-ray brightness was greater than the combined luminosity of both stars at all wavelengths under normal conditions,» noted Goddard's Adam Kowalski, who is leading a detailed study on the event.

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.

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).

If their large redshifts are due to some powerful explosive event that shot the quasars out at some tremendous speed, then you would not have to worry about the tremendous luminosities.

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).

In outburst, neutron star X-ray binaries produce less powerful jets than black holes at a given X-ray luminosity.

This method assumes that all Zero - Age main sequence stars of a given temperature (and, hence, mass) start at the same luminosity.

At the highest zoom level, hovering your mouse over each star will give you the name, spectral type and luminosity of the star, and clicking on the star will bring up an information window that allows you to search for more information on that star.

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.

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.

In fact, we are, in about a billion years, at least according to Caldeira and Kasting («The life span of the biosphere revisited, Nature, 360, 721, 1992), because the increased solar luminosity and ensuing global warming will cause the silicates to start reacting with the atmospheric CO2.

[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]

The YSO mass function (MF), constructed using a theoretical mass - luminosity relation, shows peaks at substellar (~ 0.08 - 0.18 Msolar) and intermediate (~ 1 - 1.78 Msolar) mass ranges for the IRS 1 - 3 region.

This star has at least eight tenths of Sol's mass (Bell et al, 1977, page 32), a slightly larger diameter (106 + / - 11 percent of Sol's)(Perrin and Karoji, 1987, page 236) and about 1.5 times of its luminosity.

Alpha Centauri A (α Cen A) has 1.1 times the mass and 1.519 times the luminosity of the Sun, while Alpha Centauri B (α Cen B) is smaller and cooler, at 0.907 times the Sun's mass and 0.445 times its visual luminosity.

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.

Adopting our value of 1200 light years, the intrinsic luminosity of the gaseous nebula is about 100 times that of the Sun (about -0.5 Mag absolute) while the star is at about +6 (1/3 of the Sun) and the companion at +9.

The star has a mass that is six to eight times greater than Sol's (see Petr Harmanec, 1988; and James Kaler), 14.4 (+ / - 0.4, polar) to 24.0 (+ / - 0.8, equatorial) times its diameter (ESO; and Domicano de Souza et al, 2003), and 1,070 times its visual luminosity and at least 2,900 to 5,400 times its bolometric luminosity (depending on the estimate of ultraviolet radiation).

The star has about 1.10 percent of Sol's mass (70 Virginis at exoplanets.org), 2.0 to 2.5 times its diameter (Henry et al, 1997), and 2.9 times its luminosity.

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.

Astronomers at LCO then used the GLADE catalog (Galaxy List for the Advanced Detector Era) to identify galaxies in this region of the sky and then applied an algorithm to identify which of these galaxies would be most likely to host a kilonova based on properties such as their distance and luminosity.

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.

Stars in either of these stages can have similar effective temperatures, radii and hence luminosities, i.e. they can be located at the same position in the Hertzsprung - Russell diagram.

Astronomers calculate that GRB 000131 had at least one trillion times the luminosity of Sol.

The star has a mass that may be around 1.5 times Sol's (see Professor Jim Kaler's Stars page on Arcturus), at least 24.5 times its diameter (0.019 - 0.027», according to the Yale Bright Star Catalogue, 1991 5th Revised Edition notes entry for HR 5340), and 113 (visual) to 215 times (with infrared) its luminosity (James B. Kaler, 2002, pp. 21 - 22).

Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth - Kuiper belt.

It orbits an aged, spectral type G star (KIC 11904151) of 0.895 Solar - mass and 1.06 Solar - diameter with around 1.00 Solar luminosity, which is estimated to be at least 7.4 billion years old.

When coming to age, these massive stars explode in a most violent detonation which flashes up at a luminosity of up to 10 billion times that of the sun, called supernova (of type II, or Ib or Ic), and ejecting the very greatest part of the stellar matter in a violently expanding shell.

If you apply the relationship between mass and luminosity to the H - R diagram, you find that stars along the main sequence vary from the highest (approximately 30 solar masses) at the top left to the lowest (approximately 0.1 solar mass) at the bottom right.

It also has around 150 times Sol's luminosity (based on a Johnson Vmag of 0.87 at a HIPPARCOS distance estimate of 65.12 ly), but this may increase to around 170 times Sol's.

Dullness & wrinkles Skin loses life and luminosity when you don't sleep for at least six to eight hours per night, says Tracey Beeby, head of training at Ultraceuticals.

Reawaken your skin's natural luminosity and firmness with this perfecting at - home anti-aging treatment.

This will help keep breakouts at bay and boost dead skin cell turnover, leading to more luminosity.

When strobing with makeup, the goal is to bring out skin's natural luminosity and glow; you'll be catching the light at every angle like an mystical goddess.

The triangular prism - like structure of the silk fibre allows silk to refract incoming light at different angles, which create luminosity, and the end result is that any silk close to your face will create a flattering glow!

At the same time, crystalline elements provide the taillights with additional luminosity.

If you are in a very dark room and have the luminosity levels between 50 % and 100 % you will start to notice discoloration at the top and bottom of the screen.

Colours are not super-vivid and the luminosity of the backlight becomes quite visible in dim rooms when the screen is held at angle, turning blacks a little grey - ish — AMOLED screens don't display this effect.

With each screen at full luminosity, we placed the sensor in the middle of the screen.

Teams Red Reserve, Luminosity Gaming, and Team EnVyUs rounded out the top four spots at the Call of Duty World League open event held at the Georgia World Congress Center in... [Read More]