Jump to content

Banner.jpg.b89429c566825f6ab32bcafbada449c9.jpg

Most distant Radio Galaxy record surpassed.


Recommended Posts

They've got the age of the Universe wrong in that news report

"The redshift of z = 5.72 means that the galaxy is perceived as it looked when the universe was only a billion years old. This also means that the light from this galaxy is almost 12 billion years old. "

Using the currently accepted values for Ho and Omega the  1 billion years since the big bang  is about right but the light travel time at z=5.72 is 12.72 billion years or "almost 13 billion years old" 

Unfortunately there are no contact details for the author to correct it.

Link to comment
Share on other sites

16 minutes ago, Bovski said:

Perhaps it's just red shifted into radio waves.

Yes the signal will be redshifted but the original signals were still in the radio wavelengths 

According to the abstract (the actual paper is behind a paywall) the measurements were made at 150MHz and 1.4Ghz  (~2m and 200mm wavelength)  Applying the 5.72 redshift means the signals were ~300mm and ~30mm wavelength when they left (lamda/1+z)    ie at ~1 and 10 GHz  which are microwave radio frequencies.   (visible light (5000 Angstrom) is 600000 GHz)

Robin

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.