What is the Sun’s mass-to-light ratio?
By definition our Sun has a mass-to-light ratio of 1 solar mass per solar luminosity.
How do you find the mass-to-light ratio?
The mass to light ratio can be found by integrating the IMF over mass and luminosity (assuming LB/L⊙,B = (M/M⊙)3). Y⊙ = 1.5 × 10−3 Y⊙. It make sense that this value is small since the large luminosity of super-solar stars dominates the mass of the sub-solar ones thanks to the luminosity's M3 dependence.
What is a mass-to-light ratio what object has a mass-to-light ratio of one?
The ratio of the mass of an object to its total luminosity. The mass and luminosity are usually measured in terms of solar mass and solar luminosity; hence the mass-to-light ratio of the Sun is 1.
What is the solar mass of our Sun?
A solar mass is the mass of the sun. Or, more precisely, it's 1.989 x 10^30 kilograms — about 333,000 Earths. Astronomers use a solar mass as a basic unit of mass.
What is the approximate stellar mass to light ratio of the Milky Way and why?
The stellar mass obtained in this way for the Milky Way is of the order of 5 × 1010 M⊙, and if our Galaxy is to lie on the observed TF relation together with other spirals, its M/LI ratio must be around 0.75 (see Fig.
What is the mass of this cluster within 15 million light years of the cluster center?
What is the mass of this cluster within 15 million light-years of the cluster center? The radius is 15 million light-years or 1.4×10^23 meters. Plugging in the speed found above and this radius, we find that the mass of the cluster is 3.5×10^45 kilograms or 1.8×10^35M(sun).
What is the mass to light ratio of a rich group of galaxies like the Virgo galaxy cluster?
The LS has a total mass M ≈ 1015 M ☉ and a total optical luminosity L ≈ 3×1012 L ☉. This yields a mass-to-light ratio of about 300 times that of the solar ratio ( M ☉/ L ☉ = 1), a figure that is consistent with results obtained for other superclusters.
What is a 1 solar mass star?
Small Stars– The Life of a Star of about one Solar Mass. Small stars have a mass upto one and a half times that of the Sun. Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity.
How much mass does the sun lose per second?
4.289×1012 g every second The Sun actually does lose mass in the process of producing energy. Let us see how much. we find that the Sun loses mass 4.289×1012 g every second to energy.
What is the mass-to-light ratio of a rich group of galaxies like the Virgo galaxy cluster?
The LS has a total mass M ≈ 1015 M ☉ and a total optical luminosity L ≈ 3×1012 L ☉. This yields a mass-to-light ratio of about 300 times that of the solar ratio ( M ☉/ L ☉ = 1), a figure that is consistent with results obtained for other superclusters.
Is Virgo a galaxy?
Its brightest member is the elliptical galaxy Messier 49; however its most famous member is the elliptical galaxy Messier 87, which is located in the center of the cluster….
| Virgo Cluster | |
|---|---|
| Binding mass | 1015 M ☉ |
| See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters |
How big is a supercluster?
supercluster, a group of galaxy clusters typically consisting of 3 to 10 clusters and spanning as many as 200,000,000 light-years. They are the largest structures in the universe.
What is the mass of this cluster within 15 million light-years of the cluster center?
What is the mass of this cluster within 15 million light-years of the cluster center? The radius is 15 million light-years or 1.4×10^23 meters. Plugging in the speed found above and this radius, we find that the mass of the cluster is 3.5×10^45 kilograms or 1.8×10^35M(sun).
Can a star of 2.5 solar masses ever become a white dwarf?
At present the lower-mass limit for any white dwarf is about 0.6 solar masses. These dwarfs form from main sequence stars slightly less than 1 solar-mass. Main sequence stars much less than this have not yet had time to evolve off the main sequence and form white dwarfs as the Universe is not yet old enough.
Why do we believe 90% of the mass of the Milky Way galaxy is in the form of dark matter?
Why do we believe 90 percent of the mass of the Milky Way is in the form of dark matter? the orbital speeds of stars far from the galactic center are surprisingly high, suggesting that these stars are feeling gravitational effects from unseen matter in the halo.
How long will it take the Sun to reduce its mass by 1%?
In other words, if the Sun loses 1 percent of its mass, the Earth's orbit increases in size by 1 percent. The Sun is losing about 6 x 1012 grams per second, and has a mass of 2 x 1033 grams. So the fraction of its mass it loses every year is about 10-13.
Is our sun growing or shrinking?
The sun is growing. And shrinking, and growing again. Every 11 years, the sun's radius oscillates by up to two kilometres, shrinking when its magnetic activity is high and expanding again as the activity decreases. We already know that the sun is not a static object.
What is our Universe called?
Over the next decades, the current terminology came in to use, with Milky Way as the name of our galaxy, the term Galaxy for all galaxies (groupings of billions of stars gravitationally bound), and Universe for everything.
What is our cosmic address?
Our cosmic address would be: BBC Sky at Night Magazine, Eagle House, Bristol, BS1 4ST, United Kingdom, Planet Earth, Solar System, Oort Cloud, Local Interstellar Cloud, Local Cavity, Orion Arm, Milky Way, Local Group, Virgo Supercluster, Laniakea Supercluster, the Universe.
What cluster is Earth in?
Well, Earth is located in the universe in the Virgo Supercluster of galaxies. A supercluster is a group of galaxies held together by gravity. Within this supercluster we are in a smaller group of galaxies called the Local Group. Earth is in the second largest galaxy of the Local Group – a galaxy called the Milky Way.
What is bigger than the universe?
No, the universe contains all solar systems, and galaxies.
What’s the gravity of a black hole?
The black hole would have the same gravity as the sun. Earth and the other planets would orbit the black hole as they orbit the sun now.
What is 90% of the universe mass?
NEW YORK — All the stars, planets and galaxies that can be seen today make up just 4 percent of the universe. The other 96 percent is made of stuff astronomers can't see, detect or even comprehend. These mysterious substances are called dark energy and dark matter.
What percentage of the total mass and energy in the universe is made up of dark matter?
It turns out that roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest – everything on Earth, everything ever observed with all of our instruments, all normal matter – adds up to less than 5% of the universe.
What would happen to Earth if the Sun doubled in size?
If the sun's mass were to double without pushing or pulling on the Earth, then the Earth's orbit will change to an ellipse which brings it out to our current radius but spends most of its time closer to the sun. The tides would probably get even stronger then, particularly when our orbit takes us closer to the sun.
Is Earth losing mass?
According to some calculations, the Earth is losing 50,000 tonnes of mass every single year, even though an extra 40,000 tonnes of space dust converge onto the Earth's gravity well, it's still losing weight.
What year will the Sun explode?
Astronomers estimate that the sun has about 7 billion to 8 billion years left before it sputters out and dies.
Why is the Sun not yellow anymore?
It is a common misconception that the Sun is yellow, or orange or even red. However, the Sun is essentially all colors mixed together, which appear to our eyes as white. This is easy to see in pictures taken from space. Rainbows are light from the Sun, separated into its colors.
Who created the world?
The creation story is told in Genesis 1:1 1-2.3. Christians believe God created the Universe.
Is the space infinite?
The observable universe is finite in that it hasn't existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding).