Everything about The Hertzsprung Gap totally explained
The
Hertzsprung gap is a feature of the
HR diagram for a star cluster. It is named after
Ejnar Hertzsprung who first noticed the absence of stars in the region of the
HR diagram between A5 and G0
spectral type and between +1 and -3
absolute magnitudes (for example between the top of the
main sequence and the
red giants for stars above roughly 1.5 solar mass). When a star during its
evolution crosses the Hertzsprung gap, it means that it has finished
core hydrogen burning but hasn't yet started
core helium burning.
Stars do exist in the Hertzsprung Gap region, but because they move through this section of the
HR diagram very quickly in comparison to the lifetime of the star (thousands of years, compared to tens of millions of years for the lifetime of the star), that portion of the diagram is less densely populated. Full
HR diagrams of the 11,000
Hipparcos mission targets show a handful of stars in that region.
Further Information
Get more info on 'Hertzsprung Gap'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://hertzsprung_gap.totallyexplained.com">Hertzsprung gap Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
