YZ Reticuli

Source: Wikipedia, the free encyclopedia.
YZ Reticuli
Location of YZ Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation
Reticulum
Right ascension 03h 58m 29.55s[1]
Declination −54° 46′ 41.2″[1]
Apparent magnitude (V) 3.7 - 18.0[2]
Characteristics
Variable type Nova[3] (sdB?/DA?)[4]
Distance
2703+365
−293[5] pc
YZ Ret, Gaia DR2 4731746232846281344, 2MASS
J03582954-5446411
Database references
SIMBADdata

YZ Reticuli, also known as Nova Reticuli 2020 was a

VY Sculptoris type
object with the designation MGAB-V207.

VY Sculptoris type

The variability of the object was first discovered by an amateur astronomer, Gabriel Murawski, and reported on August 6, 2019 with the name MGAB-V207.[6] Archive photometry data from the Catalina Real-time Transient Survey and ASAS-SN showed nova-like (NL) brightness variations between magnitudes 15.8 and 17.0, exhibiting a deep dimming event in late 2006.[7] The spectrum shows a hot subdwarf (sdB) or a white dwarf origin,[4] which is consistent with VY Scl type objects.

Nova eruption

The light curve of YZ Reticuli plotted from AAVSO data

On July 15, 2020

P Cygni profiles.[3] Spectrum analysis from observations by the Advanced Technology Telescope revealed a similarity to Nova Sagittarii 1991, three days after maximum brightness.[9] Pre-discovery images showed that the brightness peak happened on July 9, 2020 at magnitude 3.7.[10] In the days after the discovery, the nova faded by 0.2-0.3 magnitudes per day.[11] This is the third case when an already known cataclysmic variable has undergone a classical nova eruption, following V407 Cygni and V392 Persei.[12]

The orbital period of YZ Reticuli is 0.1324539 days (3 hours, 10 minutes, and 44 seconds), but in the months following the eruption, the lightcurve also oscillated with periods of 0.1384 and 0.1339 days. These are likely related to the accretion disk and represent a similar phenomenon to superhumps.[13]

See also

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. Bibcode:2006SASS...25...47W
    .
  3. ^
    Bibcode:2020ATel13867....1A
    .
  4. ^
    doi:10.1093/mnras/stv1771
    .
  5. S2CID 119289017
    .
  6. ^ "VSX : Detail for N Ret 2020". International Variable Star Index.
  7. ^ Murawski, G. (2019). "The discovery of eleven nova-like VY Scl type stars" (PDF). Polskiego Towarzystwa Miłośników Astronomii.
  8. ^ "CBET 4811: 20200715 : APPARENT NOVA IN RETICULUM (LIMITED ACCESS)". Central Bureau for Astronomical Telegrams. IAU. Retrieved 15 July 2020.
  9. Bibcode:2020ATel13874....1C
    .
  10. ^ "CBET 4812: 20200716 : NOVA RETICULI 2020 (LIMITED ACCESS)". Central Bureau for Astronomical Telegrams. IAU. Retrieved 16 July 2020.
  11. AAVSO
    .
  12. Bibcode:2020ATel13868....1L
    .
  13. S2CID 235632263
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=YZ_Reticuli&oldid=1175048540"