What are the mass limits to determine if a star will collapse to form a white dwarf, neutron star...?

or a black hole?

I am more interested in the mass of a star that would go supernovae to form either a neutron star or a black hole, knowing that a white dwarf would never be formed in a supernovae explosion, but at what stellar mass would it be determined if a star would become either a neutron star or a black hole. I know that all black holes are formed by supernovae explosions, and some neutron stars are formed by either supernovae explosions or from normal stellar collapse if its mass is above a certain limit (uncertain of that limit..was thinking it was 9 solar masses???)
For clarifications, my point being is that not all supernovae explosions create black holes, but would form either a black hole or a neutron star. Is this a correct assumption?

A star's mass must be greater than the 'Chandrasekhar limit' in order to become a black hole when it collapses. That's way way bigger than our sun, many solar masses if I remember correctly. Or not:

The Chandrasekhar limit is the maximum mass which can be supported against gravitational collapse by electron degeneracy pressure. It is commonly given as being about 1.4 or 1.44 solar masses. Computed values for the limit will vary depending on the nuclear composition of the mass and the approximations used. Chandrasekhar[1], eq. (36),[2], eq. (58),[3], eq. (43) gives a value of

Here, μe is the average molecular weight per electron, mH is the mass of the hydrogen atom, and is a constant connected with the solution to the Lane-Emden equation. Numerically, this value is approximately (2/μe)2 · 2.85 · 1030 kg, or , where is the standard solar mass.[4] As is the Planck mass, , the limit is of the order of MPl3/mH2.

As white dwarf stars are supported by electron degeneracy pressure, this is an upper limit for the mass of a white dwarf. Main-sequence stars with a mass exceeding approximately 8 solar masses therefore cannot lose enough mass to form a stable white dwarf at the end of their lives, and instead form either a neutron star or black hole.[5],[6],[7]

White Tea: A Healthy Alternative

There are so many flavors of tea, how can you keep them all straight? White, black and green tea come from the Camella Sinensis plant. However the leaves are picked and cultivated before the leaf opens and the buds are covered with white hair. It is more difficult to come by, so it may be a tad more expensive compared to other teas.

The young leaves are shielded from sunlight so chlorophyll does not form. White tea is a bit lighter and sweeter than black and green tea. It requires more processing and is more of a delicate tea.

White teas have less caffeine than other teas. Most generally, they have 15 mg per serving compared to 40 milligrams in black and 20 milligrams for green tea. It is also know to have more antioxidants than the other teas. It is also known to have more anti bacterial and anti viral qualities than other teas.

The Song Dynasty emperor declared white tea all that is elegant. It has since maintained it’s regal declaration. Later it was the defined as the “best” tea.

There are primarily four types of tea Ceylon and Darjeeling Silver needle and Whit Pony.. The Ceylon tea is light with a hint of pine, honey and copper flavors. The Darjeeling white has a delicate flavor that is mellow and sweet. Silver needle is bright white and the shape is uniform. White pony is sweet and mild, but full bodied.

During the Song Dynasty, producing white tea took a great deal of time and effort. It was almost ceremonial to watch, as ceramic ware was used and the process was very time consuming.

The tea leaves are picked in the early Spring and then steamed. The buds are hand picked and the leaf left unopened. Only the interior of the bud is used. It is rinsed and dried.

After cutting, the tea needs to ferment. The tea leaves are oxidized, to aid in the drying process. Depending on the type of tea, the leaves are steamed or heat is applied.

Tea has become a culture in and of itself. There are tea rooms, outdoor cafes, parties, afternoon tea, all designed with a purpose of enjoying a glass of ice tea or hot tea. Zen Buddhism offers a Japanese tea ceremony. China, Korea and the United Kingdom also have tea ceremonies.

However you decide to enjoy your tea remember that it has cancer fighting oxidants. It is virtually caloric and fat free. There are no side effects except it will help you relax and hopefully, remain stress free at least until you finish the cup. So enjoy a cup or glass and resist the temptation to move or do something and just relax!

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