Nova Centauri 2013

from Wikipedia, the free encyclopedia
Double star
Nova Centauri 2013
The nova eighteen months after the eruption (bright star in the center of the picture). ESO La Silla Observatory.
The nova eighteen months after the eruption (bright star in the center of the picture).

ESO La Silla Observatory .

AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation centaur
Right ascension 13 h 54 m 45.35 s
declination -59 ° 09 ′ 4.2 ″
Apparent brightness 15.1 mag
Typing
rel. Brightness
(G-band) 		(11.07 ± 0.03) mag
rel. Brightness
(J-band) 		(14.37 ± 0.03) mag
B − V color index 0.4 
Variable star type N / A 
Astrometry
parallax (3.6451 ± 0.969)  mas
distance (1,000)  ly
(300)  pc
Proper movement 
Rec. Share: (−19.10 ± 2.16)  mas / a
Dec. portion: (−8.00 ± 2.14)  mas / a
Physical Properties
Other names
and catalog entries
2MASS catalog 2MASS J13544534-5909040 [1]
Other names Nova Centauri 2013, V1369 Centauri, PNV J13544700-5909080, UCAC4 155-128029, USNO -B1.0 0308-00442031, Gaia DR2 5870613848610810880

Template: Infobox Star / Maintenance / MagGTemplate: Infobox Star / Maintenance / MagJ

The Nova Centauri 2013 - also known as V1369 Cen or PNV J13544700-5909080 - was a bright nova in the constellation Centaur . It was discovered on December 2, 2013 by the amateur astronomer John Seach in Australia with a brightness of 5.5  mag .

On December 14, 2013, it reached a maximum of around 3.8 mag, making it the brightest nova of this millennium to date - and easy to observe with the naked eye.

The Fermi Gamma-ray Space Telescope observed the gamma-ray emission from Centauri 2013 from December 7-10, 2013. The nova was further brightened by the gamma-rays and the peak coincided with the second optical maximum on December 11, 2013. The Swift Gamma Ray Explorer detected X-rays from Nova Centauri on February 18, 2014, and March 8, 2014 .

In July 2015 it was announced that lithium was discovered in the ejected matter from Nova Centauri in 2013. The very extensive new data clearly showed the fingerprint of lithium, which is moving two million kilometers per hour from the Nova. This is the first evidence that this element was ejected by a nova.

The mass of lithium emitted in Nova Centauri in 2013 is estimated to be very small (less than a billionth of a solar mass ). Since there have already been billions of novae in the history of the Milky Way , this adequately explains the unexpectedly high lithium concentration observed in our home galaxy. This finding is important in that it supports the thesis that additional lithium in Population I stars (compared to Population II stars) is from novae.

Individual evidence

  1. ↑ a b c d e f NOVA Cen 2013. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on March 28, 2019 .
  2. ↑ a b V1369 Cen. In: VSX. AAVSO , accessed March 28, 2019 .
  3. ↑ A Naked Eye Nova Erupts in Centaurus. Universe Today , December 4, 2013, accessed March 23, 2019 .
  4. ↑ Alert Notice 492: Nova Centauri 2013 = PNV J13544700-5909080 [V1369 Cen] ( English ) AAVSO . December 4, 2013. Accessed March 23, 2019.
  5. ↑ Nova Centauri 2013 broad maximum from visual observations calibrated with same altitude stars. arXiv , December 17, 2013, accessed on March 23, 2019 .
  6. ↑ Nova Centauri 2013: Another bright, naked-eye nova. AAVSO , May 12, 2013, accessed on March 23, 2019 .
  7. ↑ a b First evidence of lithium in an exploding star. ESO , July 29, 2015, accessed March 23, 2019 .