例句與造句

1. In more-massive stars the stars become more luminous and the pulsation period is longer, leading to enhanced mass loss, and the stars become heavily obscured at visual wavelengths.
2. There exists a well-defined relationship between a classical Cepheid variable's luminosity and pulsation period, HST observations of classical Cepheid variables have enabled firmer constraints on Hubble's law.
3. Rotating rapidly with a projected rotational velocity of 150 km s  " 1, Kerb is almost 30 times as luminous as the Sun and has a pulsation period of 56.5 minutes.
4. PSR B1620 " 26 b was originally detected through the Doppler shifts its orbit induces on signals from the star it orbits ( in this case, changes in the apparent pulsation period of the pulsar ).
5. Their pulsation periods are closely related to their luminosities, so it is possible to determine the distance to a Cepheid by measuring its oscillation period, computing its luminosity, and comparing this to its observed brightness.
6. It's difficult to find pulsation period in a sentence. 用pulsation period造句挺難的
7. However the lines do not change their shape or intensity, which would be expected from a pulsating star Non-radial pulsations have been proposed, with multiple pulsation periods of varying amplitude accounting for the apparently irregular brightness changes.
8. Lambda Aquarii is a red giant star with a stellar classification of M2.5 III . It is classified as slow irregular variable and pulsation periods of 24.5, 32.0, and 49.5 days have been identified.
9. It is a millisecond pulsar, a kind of neutron star, with a rotation period of 6.22 milliseconds ( 9, 650 rpm ), and was found to have anomalies in the pulsation period, which led to investigations as to the cause of the irregular pulses.
10. This variation has pulsation periods of 23.4, 24.3, 27.9, and 34.1 days . The effective temperature of the stellar atmosphere is around 3, 800 K, and it shines with 1, 734 times the luminosity of the Sun.
11. The period given in the General Catalogue of Variable Stars is 5.032 days . Longterm photometry finds that the strongest pulsation period is 18.1 days with an amplitude of 0.028 magnitudes, while a second is 21.9 days and 0.030 in magnitude.
12. The primary Cepheid pulsation period is 3.6 days, but it also pulsates with a secondary period of 2.56 days . It is known as a double-mode Cepheid, or a beat Cepheid since the two periods interfere to produce slow variations at a beat frequency.
13. The equipment intended for direct measurement of the explosion-generated underwater bubble was not operational at the time of the shot, but based on other measurements, the bubble's maximum radius was calculated as, and its pulsation period approximately 2.83 seconds . ( " See"
14. The General Catalogue of Variable Starslists a period of 110 days . More recent studies show a primary pulsation period of 133 days, with and a long secondary period with an amplitude of 0.2 magnitudes and duration 1, 300 days . The long secondary period variations are possibly caused by long-lived convection cells.
15. This was confirmed in 1953 by American astronomer D . Harold McNamara, who identified it as a Beta Cephei variable . ( At the time he actually identified it as a Beta Canis Majoris star, which was subsequently designated a Beta Cephei variable . ) It has a radial pulsation period of 0.15175 days ( 3.642 hours ), but also shows the behavior of a slowly pulsating B star ( SPB ) with three additional pulsational frequencies.
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