Fig. 3. Ejected dust mass fraction, md/m, as a function of the initial stellar mass, m.
But a surprising find a decade ago threatened to shake up this convenient taxonomy: Astronomers spied a body among the asteroids, later designated 113P/Elst-Pizarro, which was ejecting dust and gas like a comet.
Direct contact of molten lava with water or ice also leads to explosions which eject fine dust.
Also, R (t), R Z (t), Y Z (t) and Yd (t) are written by (6) (7) (8) (9)where φ(m) is the initial mass function (IMF), ω(m, Z(t)),m Z (m, Z(t)) and md(m, Z(t)) are the remnant mass, metal mass newly produced and ejected, and dust mass produced and ejected, by a star of initial mass m and metallicity Z, respectively.
The impact ejected enough dust into the stratosphere to darken the planet and temporarily shut down photosynthesis.
There is ongoing concern that the collapse ejected radioactive dust, which could make its way into China and other neighboring countries.
One type consists of a shell of dust ejected from a very old supergiant.
Intermingled with the usual plenitude of hydrogen and helium atoms, the cloud was surely sprinkled with some heavy-element gas and dust ejected from many prior supernovae.
Cold H I regions are heated by electrons ejected from the dust grains by interstellar ultraviolet radiation incident upon such a cloud from outside.
Results are given for two Leonid meteors observed during the 2001 encounter of Earth with dust ejected by comet 55P/Tempel-Tuttle in 1767.
