Astronomy:NGC 7222

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NGC 7222
Sloan Digital Sky Survey image of barred spiral galaxy NGC 7222
Observation data (J2000 epoch)
ConstellationAquarius
Right ascension22h 10m 51.760s
Declination+02d 06m 20.87s
Redshift0.041195
Helio radial velocity12,350 km/s
Distance568 Mly (174.1 Mpc)
Apparent magnitude (V)14.59
Characteristics
Size281,000 ly
Apparent size (V)1.2 x 1.2 arcmin
Other designations
PGC 68224, UGC 11934, CGCG 377-035, MCG +00-56-012, 2MASX J22105172+0206205, NSA 149629, SDSS J221051.74+020620.9, LEDA 68224

NGC 7222 is a large barred spiral galaxy with a ring structure,[1] located in the constellation Aquarius.[2] It is located 570 million light-years away from the Solar System[3] and was discovered by German astronomer, Albert Marth on August 11, 1864.[4]

NGC 7222 has a luminosity class of II and it has a broad H I line which contains regions of ionized hydrogen.[3] NGC 7222 also has a surface brightness of 14.20 mag/am, which means it is considered a low surface brightness galaxy (LSB).[5] LSBs are diffuse galaxies that have surface brightness one magnitude lower compared to the ambient night sky.

Supernova

One supernova has been discovered in NGC 7222 so far: SN 2008dr.

SN 2008dr

SN 2008dr was discovered by a team of astronomers; J. Leja, D. Madison, W. Li, and A. V. Filippenko from University of California, Berkeley as part of Lick Observatory Supernova Search (LOSS).[6] It had a magnitude of 16.8 and was located 1".3 west and 8".1 north of the nucleus.[7][8] SN 2008dr was confirmed to be a Type Ia.[9][10]

Companion galaxy

NGC 7222 with PGC 68229 (left)

NGC 7222 has a companion which is a spiral galaxy, PGC 68229, also known as CGCG 377-036.[11] The galaxy is located west of NGC 7222 at close proximity and is 579 million light-years distant.[12] It is possible both galaxies together make up a galactic pair.[4]

References

  1. ↑ "HyperLeda -object description". http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=NGC%207222. 
  2. ↑ "NGC 7222". http://spider.seds.org/ngc/ngc.cgi?CatalogNumber=NGC+7222. 
  3. ↑ 3.0 3.1 "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=51275&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 
  4. ↑ 4.0 4.1 "NGC Objects: NGC 7200 - 7249". https://cseligman.com/text/atlas/ngc72.htm#7222. 
  5. ↑ "Data from revised NGC and IC catalogue by Wolfgang Steinicke, NGC 7200 to 7299". http://astrovalleyfield.ca//AstronomieCompl/NGC%20et%20autres/WolfgangS/N7200_exc_web.htm. 
  6. ↑ Leja, J.; Madison, D.; Li, W.; Filippenko, A. V. (2008-06-01). "Supernovae 2008ct, 2008dq, 2008dr, and 2008ds". Central Bureau Electronic Telegrams (1419): 1. Bibcode: 2008CBET.1419....1L. https://ui.adsabs.harvard.edu/abs/2008CBET.1419....1L. 
  7. ↑ "SN 2008dr". https://w.astro.berkeley.edu/bait/2008/sn2008dr.html. 
  8. ↑ "Bright Supernovae - 2008.". https://www.rochesterastronomy.org/sn2008/index.html#2008dr. 
  9. ↑ "SN 2008dr | Transient Name Server". https://www.wis-tns.org/object/2008dr. 
  10. ↑ González-Gaitán, S.; Hsiao, E. Y.; Pignata, G.; Förster, F.; Gutiérrez, C. P.; Bufano, F.; Galbany, L.; Folatelli, G. et al. (2014-10-23). "DEFINING PHOTOMETRIC PECULIAR TYPE Ia SUPERNOVAE". The Astrophysical Journal 795 (2): 142. doi:10.1088/0004-637x/795/2/142. ISSN 1538-4357. Bibcode: 2014ApJ...795..142G. https://iopscience.iop.org/article/10.1088/0004-637X/795/2/142. 
  11. ↑ "HyperLeda -object description for PGC 68229". http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=PGC%2068229. 
  12. ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=51278&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 



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