Astronomy:NGC 1546

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NGC 1546
NGC 1546 by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationDorado
Right ascension 04h 14m 36.4s[1]
Declination−56° 03′ 40″[1]
Redshift0.004284 ± 0.000047 [1]
Helio radial velocity1,284 ± 14 km/s[1]
Distance51.8 ± 15.5 Mly (15.9 ± 4.8 Mpc)[1]
Group or clusterDorado Group
Apparent magnitude (V)11.0[2]
Characteristics
TypeSA0+? [1]
Apparent size (V)3.0′ × 1.7′[1]
Other designations
ESO 157-12, AM 0413-561, IRAS04134-5611, PGC 14723

NGC 1546 is a lenticular galaxy in the constellation Dorado. The galaxy lies about 55 million light years away from Earth, which means, given its apparent dimensions, that NGC 1546 is approximately 60,000 light years across.[1] It was discovered by John Herschel on December 5, 1834.[3] It is a member of the Dorado Group.[4]

Characteristics

The galaxy is seen nearly edge-on, with an inclination of 70°. The galaxy has a high surface brightness spiral arm pattern. The multiple spiral arms are in a pattern that is similar to that of an Sc spiral galaxy. In older images that disk appeared to have no structure, leading the galaxy to be categorised as a lenticular galaxy.[5] The H-alpha and [N II] emission is distributed in a flocculent pattern.[6] The galaxy features an inner ring, with a radius of 26 arcseconds, and an outer pseudoring 0.96 arcminutes across, which have both been detected in infrared and far ultraviolet.[7][8] There are H II regions at both rings.[6] The total star formation rate of the galaxy is estimated to be 0.83 M☉ per year.[9]

A series of dust lanes, some of which are backlit by the galaxy's core. This dust absorbs light from the core, reddening it and making the dust appear rusty-brown. The core itself glows brightly in a yellowish light indicating an older population of stars. Brilliant-blue regions of active star formation sparkle through the dust.[10] The galaxy doesn't show evidence of an outflow from the nucleus.[11] It has diffuse far ultraviolet emission from the outer regions of the galaxy and a diffuse halo. A faint shell is visible south-east of the galaxy.[7]

Nearby galaxies

The galaxy is located in the central part of the Dorado Group, forming a compact group along with NGC 1549, NGC 1553, and IC 2058.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NASA/IPAC Extragalactic Database". Results for NGC 1546. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+1546. 
  2. ↑ "Revised NGC Data for NGC 1546". https://spider.seds.org/ngc/revngcic.cgi?NGC1546. 
  3. ↑ Seligman, Courtney. "NGC 1546 (= PGC 14965)". https://cseligman.com/text/atlas/ngc15.htm#1546. 
  4. ↑ Maia, M. A. G.; da Costa, L. N.; Latham, David W. (April 1989). "A catalog of southern groups of galaxies". The Astrophysical Journal Supplement Series 69: 809. doi:10.1086/191328. Bibcode: 1989ApJS...69..809M. 
  5. ↑ Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  6. ↑ 6.0 6.1 Rampazzo, R.; Ciroi, S.; Mazzei, P.; Mille, F. Di; Congiu, E.; Cattapan, A.; Bianchi, L.; Iodice, E. et al. (1 November 2020). "Dorado and its member galaxies - Hα imaging of the group backbone". Astronomy & Astrophysics 643: A176. doi:10.1051/0004-6361/202038996. Bibcode: 2020A&A...643A.176R. 
  7. ↑ 7.0 7.1 7.2 Rampazzo, R.; Mazzei, P.; Marino, A.; Bianchi, L.; Postma, J.; Ragusa, R.; Spavone, M.; Iodice, E. et al. (August 2022). "Dorado and its member galaxies: III. Mapping star formation with FUV imaging from UVIT". Astronomy & Astrophysics 664: A192. doi:10.1051/0004-6361/202243726. Bibcode: 2022A&A...664A.192R. 
  8. ↑ Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W. et al. (February 2014). "ARRAKIS: atlas of resonance rings as known in the S 4 G". Astronomy & Astrophysics 562: A121. doi:10.1051/0004-6361/201321633. 
  9. ↑ Neumann, Lukas; Gallagher, Molly J; Bigiel, Frank; Leroy, Adam K; Barnes, Ashley T; Usero, Antonio; den Brok, Jakob S; Belfiore, Francesco et al. (23 March 2023). "The ALMOND survey: molecular cloud properties and gas density tracers across 25 nearby spiral galaxies with ALMA". Monthly Notices of the Royal Astronomical Society 521 (3): 3348–3383. doi:10.1093/mnras/stad424. 
  10. ↑ Public Domain This article incorporates text from this source, which is in the public domain. "NASA Releases Hubble Image Taken in New Pointing Mode - NASA Science". NASA. 18 June 2024. https://science.nasa.gov/missions/hubble/nasa-releases-hubble-image-taken-in-new-pointing-mode/. 
  11. ↑ Stuber, Sophia K.; Saito, Toshiki; Schinnerer, Eva; Emsellem, Eric; Querejeta, Miguel; Williams, Thomas G.; Barnes, Ashley T.; Bigiel, Frank et al. (September 2021). "Frequency and nature of central molecular outflows in nearby star-forming disk galaxies". Astronomy & Astrophysics 653: A172. doi:10.1051/0004-6361/202141093. Bibcode: 2021A&A...653A.172S. 

Template:NGC objects:1001-2000



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