NGC 1692

NGC 1692
The lenticular galaxy NGC 1692
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension04h 55m 23.71s[1]
Declination−20° 34′ 15.87″[1]
Redshift0.035364[1]
Heliocentric radial velocity10,602 km/s ± 35[1]
Distance510 Mly
Apparent magnitude (V)13.0[2]
Characteristics
TypeSA(s)0^0^: WLRG[1]
Size~387,000 ly (118.7 kpc) (estimated)[1]
Other designations
Cul 0453−0206, ESO 552−G021, G4Jy 0507, PGC 16336, OF −289, MCG 03-13-029, MRSS 552−097500, PAPER J073.83−20.50, RR 095a, VLSS J0455.3−2034[1]

NGC 1692 is a lenticular galaxy and also a LINER galaxy located in the constellation of Eridanus. The galaxy has a redshift of (z) 0.035[3] which corresponds to a Hubble distance of 156 ± 11 megaparsecs or 510 million light-years[1] and it was first discovered by an American astronomer named Ormond Stone on 11 December, 1885.[4]

Description

NGC 1692 appears to look like an elliptical galaxy despite being categorized as a lenticular according to NASA/IPAC Database website, with an undisturbed appearance.[1][5] It has one companion, an edge-on spiral galaxy located south-east from it with a C-shaped appearance.[5] Evidence also shows that NGC 1692 also presence of excessive ultraviolet emission, traces of young stellar populations but absence of emission lines in its optical spectrum.[6]

The galaxy has also been categorized as a radio galaxy of low-luminosity or alternatively, a weak-line radio galaxy (WLRG) of Fanaroff-Riley Type I classification.[6][7][8] When imaged with Very Large Array (VLA), it has a double lobed structure with a radio jet located towards the direction of north-west, which terminates in a hotspot region. However when the southern part was observed, there is no radio jet but instead a warm-spot feature located at the edge of the radio lobe.[9] Earlier imaging made in 1993, found evidence it is surrounded by diffused radio emission but no sign of any radio core.[10] There is also a presence of a steep power-law component.[11] Other imaging also showed the source is compact with a double structure with radio emission likely originating from hotspots rather the core region.[12]

A study of its host galaxy has found out, there are evidence of flux on the western side, just beyond its nucleus region. This suggests the galaxy might have an asymmetric appearance.[13]

References

  1. ^ a b c d e f g h i "NED Search results for NGC 1692". NASA/IPAC Extragalactic Database. Retrieved 2025-12-14.
  2. ^ "Revised NGC Data for NGC 1692". spider.seds.org. Retrieved 30 March 2024.
  3. ^ Lewis, Karen T.; Eracleous, Michael; Sambruna, Rita M. (August 2003). "Emission-Line Diagnostics of the Central Engines of Weak-Line Radio Galaxies". The Astrophysical Journal. 593 (1): 115–126. arXiv:astro-ph/0304399. Bibcode:2003ApJ...593..115L. doi:10.1086/376445. ISSN 0004-637X.
  4. ^ "New General Catalog Objects: NGC 1650 - 1699". cseligman.com. Retrieved 2025-12-14.
  5. ^ a b Govoni, F.; Falomo, R.; Fasano, G.; Scarpa, R. (May 2000). "Optical surface photometry of radio galaxies. II. Observations and data analysis". Astronomy and Astrophysics Supplement Series. 143 (3): 369–390. arXiv:astro-ph/0001449. Bibcode:2000A&AS..143..369G. doi:10.1051/aas:2000338. ISSN 0365-0138.
  6. ^ a b Wills, K. A.; Morganti, R.; Tadhunter, C. N.; Robinson, T. G.; Villar-Martin, M. (2004-01-21). "Emission lines and optical continuum in low-luminosity radio galaxies". Monthly Notices of the Royal Astronomical Society. 347 (3): 771–786. arXiv:astro-ph/0310256. Bibcode:2004MNRAS.347..771W. doi:10.1111/j.1365-2966.2004.07195.x. ISSN 0035-8711.
  7. ^ Morganti, R.; Oosterloo, T. A.; Reynolds, J. E.; Tadhunter, C. N.; Migenes, V. (January 1997). "A study of cores in a complete sample of radio sources" (PDF). Monthly Notices of the Royal Astronomical Society. 284 (3): 541–551. doi:10.1093/mnras/284.3.541. ISSN 0035-8711.
  8. ^ Miller, Neal A.; Owen, Frazer N.; Burns, Jack O.; Ledlow, Michael J.; Voges, Wolfgang (November 1999). "An X-Ray and Optical Investigation of the Environments around Nearby Radio Galaxies". The Astronomical Journal. 118 (5): 1988–2001. arXiv:astro-ph/9908244. Bibcode:1999AJ....118.1988M. doi:10.1086/301086. ISSN 0004-6256.
  9. ^ Morganti, R.; Oosterloo, T.; Tadhunter, C. N.; Aiudi, R.; Jones, P.; Villar-Martin, M. (1999-12-01). "The radio structures of southern 2-Jy radio sources: New ATCA and VLA radio images" (PDF). Astronomy and Astrophysics Supplement Series. 140 (3): 355–372. arXiv:astro-ph/9910150. Bibcode:1999A&AS..140..355M. doi:10.1051/aas:1999427. ISSN 0365-0138.
  10. ^ Morganti, R.; Killeen, N. E. B.; Tadhunter, C. N. (August 1993). "The radio structures of southern 2-Jy radio sources". Monthly Notices of the Royal Astronomical Society. 263 (4): 1023–1048. doi:10.1093/mnras/263.4.1023. ISSN 0035-8711.
  11. ^ Gliozzi, M.; Foschini, L.; Sambruna, R. M.; Tavecchio, F. (2007-11-29), "The polyhedral nature of LINERs: An XMM-Newton view of LINERs in radio galaxies", Astronomy & Astrophysics, 478 (3): 723–737, arXiv:0711.4773, doi:10.1051/0004-6361:20078414
  12. ^ Sadler, Elaine M.; Ekers, Ronald D.; Mahony, Elizabeth K.; Mauch, Tom; Murphy, Tara (December 2013). "The local radio-galaxy population at 20 GHz". Monthly Notices of the Royal Astronomical Society. 438 (1): 796–824. doi:10.1093/mnras/stt2239. ISSN 0035-8711.
  13. ^ Inskip, K. J.; Tadhunter, C. N.; Morganti, R.; Holt, J.; Ramos Almeida, C.; Dicken, D. (2010-07-15). "A near-IR study of the host galaxies of 2 Jy radio sources at 0.03 ≲z≲ 0.5 - I. The data★". Monthly Notices of the Royal Astronomical Society. 407 (3): 1739–1766. doi:10.1111/j.1365-2966.2010.17002.x. ISSN 0035-8711.


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.