A Horizontal Branch Star Has Which of the Following

Eventually it runs out of helium to burn in the core and instead begins to burn helium in a shell around the carbon ash core surrounded by another shell burning hydrogen. D At this stage the stars core has 3 layers.

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The lower the mean metallicity of the cluster the bluer the horizontal branch is.

. Of the following objects which is most likely to be found near the center of a supernova remnant. They generate energy through both hydrogen fusion and helium fusion. It consists of low-mass stars that have lost mass during the red-giant phase.

Where the instability strip associated with pulsating variables crosses the horizontal branch the stars are RR Lyrae. The star will convert all of its core helium into carbon and oxygen and then fusion will end once again. The core will again begin to collapse inward.

A They have inert non-burning carbon cores. A In the core of a horizontal branch red giant only helium nuclei are being fused into heavier nuclei. In a particular star cluster all horizontal branch stars have the same spectral type.

This is reflected in the BR B ratio for the HB stars. The horizontal branch HB is a stage of stellar evolution that immediately follows the red giant branch in stars whose masses are similar to the Suns. This list may not reflect recent changes.

Horizontal branch stars have left the main sequence and they are no longer powered by hydrogen fusion in their cores. They generate energy through both hydrogen fusion and helium fusion. C They generate energy through both hydrogen fusion and helium fusion.

Which of the following statements about these horizontal branch stars is true. Which of the following statements about horizontal branch red giants is correct. Where in the star does this energy generation occur.

First for each star or group of stars after binning with a given. D In a particular star cluster all horizontal branch stars have the same spectral type. C They generate energy through both hydrogen fusion and helium fusion.

Since the presence of RR Lyrae stars is a function of the morphology of the HB the clusters of lower metallicity have a larger population of these variables. The properties of horizontal branch stars depend on the amount of carbon nitrogen and oxygen that they contain but all theoretical models have difficulty in explaining those stars right at the blue end of the horizontal branch. B Their sole source of energy is hydrogen shell burning.

The A-type spectra seen in blue horizontal-branch stars can be distinguished from population I main-sequence A-type stars by their stronger Balmer jump stronger and deeper. Those with masses 08 M 8 M a range which encompasses the majority of stars in the Galaxy including our Sun. The horizontal branch HB is a stage of stellar evolution that immediately follows the red giant branch in stars whose masses are similar to the Sun s.

The following is a brief summary of the computational procedure. The presence of extreme horizontal branch EHB and blue hook stars in some Galactic globular cluster s GGCs constitutes one of the remaining mysteries of stellar evolution. In a particular star cluster all horizontal branch stars have the same spectral type.

Their sole source of energy is hydrogen shell burning. A They have inert non-burning carbon cores. To create a clean sky catalogue of blue horizontal-branch.

They have inert non-burning carbon cores. Observationally most blue horizontal-branch stars are expected to have an A-type Xue et al2008 or very late B-type spectra. OpticaltoNear-IRRangeColors Here we address the theoretical integrated broadband colors in the standard UBVRIK filter system.

The star suddenly shifts to the horizontal branch red dot at the bottom of the upper red line via the blue arrow. D In a particular star cluster all horizontal branch stars have the same spectral type. The length of the theoretical evolutionary tracks always appears to be less than what is observed.

To learn more about these types of stars review the corresponding lesson called Red Giant Horizontal Asymptotic Branch Stars. Which of the following statements about these horizontal branch stars is true. Blue horizontal-branch stars evolve from low-mass stars that have completed their main-sequence lifetimes and undergone a helium flash at the end of their red-giant phase.

Thus such a star is known as a horizontal branch star a star that is increasing in temperature but not changing its luminosity. View Notes - Final Study 3Term. They have inert non-burning carbon cores.

After departing the Main Sequence these stars spend time on the Red Giant Branch a phase characterised by hydrogen burning in a shell around the stellar core. B Their sole source of energy is hydrogen shell burning. This category has only the following subcategory.

A horizontal strip on the HertzsprungRussell diagram of a globular cluster to the left of the red-giant branch. After helium burning begins either explosively with a flash or gradually for heavier stars the star has two sources of energy hydrogen fusion in a shell around the core and helium fusion in the core. Which of the following statements about these horizontal branch stars is true.

Their sole source of energy is hydrogen shell burning. B BL Herculis variables 3 P Pages in category Horizontal-branch stars The following 185 pages are in this category out of 185 total. The helium core flash that occurs with stars at the top of the red giant branch causes substantial changes in stellar structure resulting in an overall reduction in luminosity some contraction of the stellar.

What processs powers the luminosity of horizontal branch stars. Such stars have cores composed of helium where helium is fused to. Asymptotic giant branch PAGB stars are not considered here.

Which of the following statements about these horizontal branch stars is true. C The stars outer layers are slowly contracting and rising in temperature. As such blue horizontal-branch stars are very old objects that can be used as markers in studies of the Galactic structure and formation history.

They all have absolute magnitudes of about the same value. The horizontal branch phase of a stars life is much shorter than the Main Sequence phase of its lifetime. Helium burns into carbon and carbon combines with helium to.

This is a phase of stellar evolution undergone by intermediate- mass stars ie.

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