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NGC 5777

From Wikipedia, the free encyclopedia

NGC 5777
Observation data (J2000 epoch)
ConstellationDraco
Right ascension14h 51m 18s
Declination+58° 58′ 40″
Distance~114 million
Apparent magnitude (B)14.2
Surface brightness23.96 mag/arcsec2
Other designations
UGC 9568, LEDA 53043, ISOSS J14513+5858

NGC 5777 is a large edge-on spiral galaxy located in the constellation Draco.[1] Its speed relative to the cosmic microwave background is 2,210 ± 5 km/s, which corresponds to a Hubble distance of 32.6 ± 2.3 Mpc (~106 million ly). NGC 5777 was discovered by German-British astronomer William Herschel in 1789.[2]

The luminosity class of NGC 5777 is II and it has a broad HI line.[clarification needed] It is also an active galaxy with narrow optical emission lines.[3][failed verification] To date, nine non-redshift measurements yield a distance of 44.289 ± 8.577 Mpc (~144 million ly), which is just within the distance values of Hubble.

A spectrum obtained on July 10, 2001, by the Isaac Newton Telescope showed a type-IIp supernova at the center of NGC 5777.[4] SN 2001dc was formed from a group of low-luminosity events, among with other supernovae in the region. They contain narrow spectral lines (indicating low expansion velocities) and low luminosities at every phase, which is untypical for a supernovae.[5]

See also

External links

References

  1. ^ "NGC 5777 - Spiral Galaxy in Draco | TheSkyLive.com". theskylive.com. Retrieved 2024-04-16.
  2. ^ Guide, Universe (2 July 2022). "NGC 5777 Galaxy Facts (UGC 9568) & Distance". Universe Guide. Retrieved April 16, 2024.
  3. ^ Iovene, Salvatore. "NGC 5777". AstroBin. Retrieved 2024-04-16.
  4. ^ Hurst, G. M.; Armstrong, M.; Meikle, P.; Bramich, D.; Corradi, R.; Erwin, P.; Boles, T.; Irwin, M.; Fassia, A. (2001-07-01). "Supernova 2001dc in NGC 5777". International Astronomical Union Circular (7662): 1. Bibcode:2001IAUC.7662....1H. ISSN 0081-0304.
  5. ^ "Low-luminosity Type II supernovae: spectroscopic and photometric evolution". academic.oup.com. Retrieved 2024-04-16.
This page was last edited on 13 May 2024, at 12:30
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