Space roar

The space roar is a radio signal from outer space. Discovered by NASA's Alan Kogut and his team,[1] space roar was announced at the 213th meeting of the American Astronomical Society on January 7, 2009.[2] Described as a loud hiss, the team discovered the signal while trying to find traces of heat from first generation stars using an ARCADE radiometer.[1][3] This instrument is designed to detect radiation at centimeter wavelengths.[4] Though signals from radio galaxies have been detected before, the "space roar" sounds six times louder than what is predicted from those sources. Scientists have yet to explain its source.[3] NASA scientists have currently ruled out primordial stars and all other known radio sources. The roar currently limits the study of the universe's earliest stars.[3]

Equipment error as possible explanation

In 2011, the ARCADE 2 researchers reported, "Correcting for instrumental systematic errors in measurements such as ARCADE 2 is always a primary concern. We emphasize that we detect residual emission at 3 GHz with the ARCADE 2 data, but the result is also independently detected by a combination of low-frequency data and FIRAS."[5]

See Also

Wow! signal

References

  1. 1 2 Thompson, Andrea (7 January 2009). "Mystery Roar from Faraway Space Detected". Space.com. Retrieved 12 January 2009.
  2. ↑ McCall, Logan (January 12, 2009). "Mysterious Roar from Outer Space Baffles Scientists". Yahoo! Voices.
  3. 1 2 3 Reddy, Francis (January 7, 2009). "NASA Balloon Mission Tunes in to a Cosmic Radio Mystery". NASA. Retrieved 12 January 2009.
  4. ↑ Kogut, A.; Fixsen, D; Fixsen, S; Levin, S; Limon, M; Lowe, L; Mirel, P; Seiffert, M; Singal, J; Lubin, P; Wollack, E (December 2006). "ARCADE: Absolute radiometer for cosmology, astrophysics, and diffuse emission". New Astronomy Reviews 50 (11–12): 925–931. arXiv:astro-ph/0609373. Bibcode:2006NewAR..50..925K. doi:10.1016/j.newar.2006.09.023.
  5. ↑ Seiffert, M.; Fixsen, D. J.; Kogut, A.; et al. (10 June 2011). "Interpretation of the ARCADE 2 absolute sky brightness measurement" (PDF). The Astrophysical Journal 734 (6): 1–8. Bibcode:2011ApJ...734....6S. doi:10.1088/0004-637x/734/1/6.


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