NGC 1672

Coordinates: Sky map 04h 45m 42.5022s, −59° 14′ 50.162″
Source: Wikipedia, the free encyclopedia.
J2000 epoch)
ConstellationDorado
Right ascension04h 45m 42.5022s[1]
Declination−59° 14′ 50.162″[1]
Redshift0.004440[1]
Heliocentric radial velocity1,331±3 km/s[1]
Distance51.7 ± 3.0 Mly (15.86 ± 0.92 Mpc)[2]
Apparent magnitude (V)10.3[1]
Characteristics
Type(R')SB(r)bc[1]
Size~100,800 ly (30.91 kpc) (estimated)[1]
Apparent size (V)6.6′ × 5.5′[1]
Other designations
ESO 118- G 043, IRAS 04449-5920, PGC 15941, VV 826[1]

NGC 1672 is a barred spiral galaxy located in the constellation Dorado. It was discovered by Scottish astronomer James Dunlop on 5 November 1826.[3] It was originally unclear whether it was a member of the Dorado Group, with some sources[4] finding it to be a member and other sources[5] rejecting its membership. However, recent tip of the red-giant branch (TRGB) measurements indicate that NGC 1672 is located at the same distance as other members, suggesting it is indeed a member of the Dorado Group.[2]

NGC 1672 has a large bar which is estimated to measure around 20 kpc.

Seyfert type II and is engulfed by a starburst region.[6] The strongest polarized emissions come from the northeastern region which is upstream from its dust lanes.[6] Magnetic field lines are at large angles with respect to the bar and turn smoothly to the center.[6]

General structure

The center of the galaxy contains a high surface brightness bar, and four filament-like spiral arms extend outward from the ends of this bar. The spiral arms are asymmetric; one of the arms in the northeast part of the disk is significantly brighter than its counterpart on the other side. The spiral arms also contain numerous star formation regions, some of which may be as large as 4″.[7]

Nucleus

The classification of the nucleus of NGC 1672 is uncertain. Most galaxies may be classified by their spectra as having one of three different types of nuclei:[8]

NGC 1672, however, is one of several nearby galaxies that does not fit into this classification scheme, as its spectrum appears intermediary between these three classes of objects.

ultraviolet light), the star formation regions are the primary source of emission.[9]

Supernovae

Two supernovae have been observed in NGC 1672:

  • SN 2017gax (type Ib/c, mag. 14.1) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 14 August 2017.[10]
  • SN 2022aau (type II, mag. 16.3) was discovered by DLT40 on 20 January 2022.[11]

See also

References

  1. ^ a b c d e f g h i "Results for object NGC 1672". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-04-29.
  2. ^
    S2CID 221556782
    .
  3. ^ Seligman, Courtney. "New General Catalogue objects: NGC 1650 - 1699". cseligman.com. Retrieved 2021-04-29.
  4. doi:10.1086/160000
    .
  5. ISSN 0067-0049
    .
  6. ^
    S2CID 14749261
    .
  7. ISBN 978-0-87279-667-6
    .
  8. ^
    Bibcode:1997A&A...319...52V
    .
  9. doi:10.1086/191771
    .
  10. ^ "SN 2017gax". Transient Name Server. IAU. Retrieved 11 March 2025.
  11. ^ "SN 2022aau". Transient Name Server. IAU. Retrieved 11 March 2025.
Wikimedia Commons has media related to NGC 1672.


Retrieved from "https://en.wikipedia.org/w/index.php?title=NGC_1672&oldid=1279953159"