GK Persei

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description Template:Use dmy dates

GK Persei
File:GKPersei-MiniSuperNova-20150316.jpg
GK Persei and the surrounding Firework Nebula.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Perseus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 0.02[2] - 14.0[3]
Characteristics
Spectral type K1IV[4]
Astrometry
Radial velocity (Rv)5.5[5] km/s
Proper motion (μ) RA: −6.878[6] mas/yr
Dec.: −17.348[6] mas/yr
Parallax (π)2.3063±0.0415 mas[6]
DistanceScript error: No such module "convert".Script error: No such module "Su". ly
(Script error: No such module "val".[2] pc)
Absolute magnitude (MV)−9.1 - +3.7[2]
Orbit[7]
Period (P)1.996872 ± 0.000009 d
Inclination (i)67 ± 5°
Semi-amplitude (K2)
(secondary)		126.4 ± 0.9 km/s
Details[7]
White dwarf
MassScript error: No such module "val". Template:Solar mass
Subgiant
MassScript error: No such module "val". Template:Solar mass
Radius2.26 ± 0.11 Template:Solar radius
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
GK Per, Nova Per 1901, HD 21629, HR 1057, BD+43 740a, 2MASS J03311201+4354154, 1RXS J033111.9+435427[8]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".GK Persei (also Nova Persei 1901) was a bright nova first observed on Earth in 1901. It was discovered by Thomas David Anderson, an Edinburgh clergyman, at 02:40 UT on 22 February 1901 when it was at magnitude 2.7.[9][10] It reached a maximum magnitude of 0.2, the brightest nova of modern times until Nova Aquilae 1918. After fading into obscurity at about magnitude 12 to 13 during the early 20th century, GK Persei began displaying infrequent outbursts of 2 to 3 magnitudes (about 7 to 15 times quiescent brightness). Since about 1980, these outbursts have become quite regular, typically lasting about two months and occurring about every three years. Thus, GK Persei seems to have changed from a classical nova like Nova Aquilae 1918 to something resembling a typical dwarf nova-type cataclysmic variable star.

Surrounding GK Persei is the Firework Nebula, a nova remnant first detected in 1902 consisting of an expanding cloud of gas and dust bubbles moving up to 1200 km/s.[11]

File:GKPerLightCurve.png
The light curve of GK Persei, plotted from AAVSO data. The main plot shows the major outburst in 1901. Subplot A shows the minor outbursts which have been occurring about every 3 years since around 1980. Subplot B shows the outburst that occurred in 2018, on an expanded scale.

GK Persei has precise parallaxes reported from Gaia DR2 and Gaia EDR3,[12][6] but these are thought to be badly affected by the binary nature of the system. The Hubble Space Telescope has used a different method to derive the distance to GK Persei using nebular expansion velocity and compares that with its own astrometric parallax calculation. This gave a somewhat smaller parallax (larger distance) than the Gaia measurements.[13]

Properties

Novae consist of a main-sequence to giant star that accretes mass onto a white dwarf. The two stars of GK Persei orbit each other with a period of nearly 2 days. The white dwarf, with a mass of Template:Solar mass, has one of the highest masses measured in a cataclysmic variable. The donor star, having donated much of its mass to the white dwarf, is only Template:Solar mass despite being a subgiant star.[7]

Gallery

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b Script error: No such module "citation/CS1".
  2. ↑ a b c Script error: No such module "Citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "Citation/CS1".
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ a b c d Template:Cite Gaia EDR3
  7. ↑ a b c Script error: No such module "Citation/CS1".
  8. ↑ Template:Cite simbad
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Template:Cite Gaia DR2
  13. ↑ Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

External links

Template:Stars of Perseus Template:Authority control

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=GK_Persei&oldid=1673654"