N6946-BH1 is a disappeared star located in the galaxy NGC 6946 , located at a distance of approximately 22 million light years from the Sun.
| N6946-BH1 | |
|---|---|
| Star | |
 | |
| Observational data ( Age J2000.0 ) | |
| Type of | Single star |
| Right ascension | |
| Declination | |
| Distance | 22 million St. of the year |
| Constellation | Swan |
| Characteristics | |
| Spectral class | Red supergiant |
| physical characteristics | |
| Weight | ≈25 M ☉ |
| Database Information | |
| SIMBAD | |
Observations
The star was a massive red supergiant , surpassing in mass our Sun by about 25 times [1] . Astronomers followed it for several years using the ground-based LBT telescope ( Large Binocular Telescope ) and two orbital telescopes - Hubble and Spitzer . Between March and May 2009, the luminosity of a star exceeded several million luminosities of the Sun. After that, until 2015, she disappeared from optical visibility. In the middle and near infrared, the star remains visible, however, the brightness decreases in proportion to t −4/3 . It is believed that the increase in brightness was insufficient for a supernova outbreak to occur, therefore, it was proposed to call such a phenomenon a “failed supernova” ( English failed supernova ).
One hypothesis suggests that the N6946-BH1 nucleus collapsed into a black hole . The collapse of matter caused an outburst of neutrinos , which reduced the mass of N6946-BH1 by a fraction of a percent and caused a shock wave that tore off the star’s shell, which increased its brightness [2] . If this event really reflects the formation of a black hole, then this will be the first observation of such a process [3] . Further observations of the object are planned to begin using the Chandra space x-ray telescope.
Notes
- ↑ SM Adams et al. The search for failed supernovae with the Large Binocular Telescope: confirmation of a disappearing star . Arxiv.org (May 14, 2017). Date of appeal May 27, 2017.
- ↑ Matt Williams. Have we really just seen the birth of a black hole? (English) (inaccessible link) . Phys.org (September 16, 2016). Date of treatment May 27, 2017. Archived June 21, 2017.
- ↑ Anna Nowogrodzki. First glimpse of a black hole being born from a star's remains . New Scientist (September 12, 2016). Date of appeal May 27, 2017.
Links
- Collapsing Star Gives Birth to a Black Hole . NASA (May 25, 2017). Date of appeal May 27, 2017.
- Star N6946-BH1 has disappeared from the Universe . Lenta.ru (May 26, 2017). Date of appeal May 27, 2017.
- Star Gives Birth to Possible Black Hole in Hubble and Spitzer Images (English) , Youtube .