NGC 1832

The galaxy has a bright nucleus. The bar has bright ansae at its ends{{cite journal |last1=Eskridge |first1=Paul B. |last2=Frogel |first2=Jay A. |last3=Pogge |first3=Richard W. |last4=Quillen |first4=Alice C. |last5=Berlind |first5=Andreas A. |last6=Davies |first6=Roger L. |last7=DePoy |first7=D. L. |last8=Gilbert |first8=Karoline M. |last9=Houdashelt |first9=Mark L. |last10=Kuchinski |first10=Leslie E. |last11=Ramirez |first11=Solange V. |last12=Sellgren |first12=K. |last13=Stutz |first13=Amelia |last14=Terndrup |first14=Donald M. |last15=Tiede |first15=Glenn P. |title=Near-Infrared and Optical Morphology of Spiral Galaxies |journal=The Astrophysical Journal Supplement Series |date=November 2002 |volume=143 |issue=1 |pages=73–111 |doi=10.1086/342340|arxiv=astro-ph/0206320 |bibcode=2002ApJS..143...73E }} and two loosely wounded arms in a nearly grand design pattern emanate from there. The arms form a nearly complete inner ring at the end of the bar.Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington The ring has a radius of 13 arcseconds and has an estimated star formation rate of 0.70 ± 0.20 {{solar mass}}.{{cite journal |last1=Grouchy |first1=R. D. |last2=Buta |first2=R. J. |last3=Salo |first3=H. |last4=Laurikainen |first4=E. |title=Ring Star Formation Rates in Barred and Nonbarred Galaxies |journal=The Astronomical Journal |date=1 June 2010 |volume=139 |issue=6 |pages=2465–2493 |doi=10.1088/0004-6256/139/6/2465|arxiv=1004.5063 |bibcode=2010AJ....139.2465G }} The ring appears as a pseudoring in H-alpha. There is also Hα emission from the nucleus not between the nucleus and the inner ring.{{cite journal |last1=Crocker |first1=Deborah A. |last2=Baugus |first2=Pamela D. |last3=Buta |first3=R. |title=The Distribution and Properties of H II Regions in Early-to-Intermediate Hubble Type Ringed Galaxies |journal=The Astrophysical Journal Supplement Series |date=August 1996 |volume=105 |pages=353 |doi=10.1086/192318|bibcode=1996ApJS..105..353C }} The west arm appears diffuse and resembles more like narrow spiral arm fragments. The east arm is better defined. Both arms complete less than half of revolution before fading. There are many HII regions along both arms, the largest of which are more than two arcseconds across. The star formation doesn't appear to be due to a leading density wave causing a pressure shock to the arms of the galaxy.{{cite journal |last1=Beckman |first1=J. E. |last2=Cepa |first2=J. |title=The nature of arms in spiral galaxies. I. Azimuthal colour profiles of NGC 7479 and NGC 1832. |journal=Astronomy and Astrophysics |date=1 March 1990 |volume=229 |pages=37–46 |bibcode=1990A&A...229...37B |url=https://ui.adsabs.harvard.edu/abs/1990A%26A...229...37B/abstract |issn=0004-6361}}

Two supernovae have been observed in NGC 1832:

• SN 2004gq (type Ib,{{cite journal |last1=Modjaz |first1=M. |last2=Kirshner |first2=R. |last3=Challis |first3=P. |last4=Falco |first4=E. |title=Supernovae 2004gq and 2005A |journal=International Astronomical Union Circular |date=1 January 2005 |issue=8461 |pages=3 |url=http://www.cbat.eps.harvard.edu/iauc/08400/08461.html#Item2 |issn=0081-0304}} peak visual magnitude 15.3{{cite journal |last1=Drout |first1=Maria R. |last2=Soderberg |first2=Alicia M. |last3=Gal-Yam |first3=Avishay |last4=Cenko |first4=S. Bradley |last5=Fox |first5=Derek B. |last6=Leonard |first6=Douglas C. |last7=Sand |first7=David J. |last8=Moon |first8=Dae-Sik |last9=Arcavi |first9=Iair |last10=Green |first10=Yoav |title=THE FIRST SYSTEMATIC STUDY OF TYPE Ibc SUPERNOVA MULTI-BAND LIGHT CURVES |journal=The Astrophysical Journal |date=10 November 2011 |volume=741 |issue=2 |pages=97 |doi=10.1088/0004-637X/741/2/97|arxiv=1011.4959 |bibcode=2011ApJ...741...97D }}) was discovered independently on 11 December 2004 by H. Pugh and W. Li, using the Katzman Automatic Imaging Telescope, and by F. Manzini, as part of the Stazione Astronomica di Sozzago Supernova Search.{{cite journal |last1=Green |first1=Daniel |title=IAUC 8452: TRANSIENT IN Lyn; 2004gq, 2004gr |website=www.cbat.eps.harvard.edu |date=12 December 2004 |volume=8452 |url=http://www.cbat.eps.harvard.edu/iauc/08400/08452.html}}
• SN 2009kr (type II-L) was discovered by Koichi Itagaki on 6 November 2009 at an apparent magnitude of 16.{{cite journal |last1=Nakano |first1=S. |last2=Yusa |first2=T. |last3=Kadota |first3=K. |title=Supernova 2009kr in NGC 1832 |journal=Central Bureau Electronic Telegrams |date=8 November 2009 |issue=2006 |pages=1 |url=http://www.cbat.eps.harvard.edu/iau/cbet/002000/CBET002006.txt}} The progenitor star was identified in images by the Hubble Space Telescope as a luminous supergiant with a mass over 18 {{solar mass}}, the first time a progenitor of a type II-L supernova was identified.{{cite journal |last1=Elias-Rosa |first1=Nancy |last2=Van Dyk |first2=Schuyler D. |last3=Li |first3=Weidong |last4=Miller |first4=Adam A. |last5=Silverman |first5=Jeffrey M. |last6=Ganeshalingam |first6=Mohan |last7=Boden |first7=Andrew F. |last8=Kasliwal |first8=Mansi M. |last9=Vinkó |first9=József |last10=Cuillandre |first10=Jean-Charles |last11=Filippenko |first11=Alexei V. |last12=Steele |first12=Thea N. |last13=Bloom |first13=Joshua S. |last14=Griffith |first14=Christopher V. |last15=Kleiser |first15=Io K. W. |last16=Foley |first16=Ryan J. |title=THE MASSIVE PROGENITOR OF THE TYPE II-LINEAR SUPERNOVA 2009kr |journal=The Astrophysical Journal |date=10 May 2010 |volume=714 |issue=2 |pages=L254–L259 |doi=10.1088/2041-8205/714/2/L254|arxiv=0912.2880 |bibcode=2010ApJ...714L.254E }}

NGC 1832 is the foremost galaxy of the NGC 1832 Group,{{cite journal|last1=Makarov|first1=Dmitry|last2=Karachentsev|first2=Igor|title=Galaxy groups and clouds in the local (z~ 0.01) Universe|journal=Monthly Notices of the Royal Astronomical Society|date=21 April 2011|volume=412|issue=4|pages=2498–2520|doi=10.1111/j.1365-2966.2010.18071.x|doi-access=free |bibcode=2011MNRAS.412.2498M|arxiv=1011.6277|s2cid=119194025}} also known as LGG 129. Other members of the group include spiral galaxies MCG-3-14-1, MCG-3-14-4, MCG-2-14-2, and MCG-2-14-4.{{cite journal |last1=Garcia |first1=A. M. |title=General study of group membership. II. Determination of nearby groups. |journal=Astronomy and Astrophysics Supplement Series |date=1 July 1993 |volume=100 |pages=47–90 |url=https://cdsarc.cds.unistra.fr/ftp/J/A+AS/100/47/table2.dat |bibcode= 1993A&AS..100...47G |issn=0365-0138|bibcode-access=free}}

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{{NGC objects:1001-2000}}

{{Lepus (constellation)}}

Category:Barred spiral galaxies

Category:Lepus (constellation)

Category:Discoveries by William Herschel

Category:Astronomical objects discovered in 1785

1832

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