NGC 1808

NGC 1808
NGC 1808 imaged by the Cerro Tololo Inter-American Observatory
Observation data (J2000 epoch)
ConstellationColumba[1]
Right ascension05h 07m 42.331s[2]
Declination−37° 30′ 45.88″[2]
Redshift0.003339[2]
Distance41.7 ± 3.9 Mly (12.8 ± 1.2 Mpc)[3]
Group or clusterDorado Group
Apparent magnitude (V)9.94[4]
Apparent magnitude (B)10.83[5]
Characteristics
Type(R)SAB(s)a[6]
Size~88,100 ly (27.01 kpc) (estimated)[2]
Apparent size (V)7′.41 × 3′.39[7]
Other designations
ESO 305- G 008, IRAS 05059-3734, MCG -06-12-005, PGC 16779[2]

NGC 1808 is a barred spiral galaxy[3] located in the southern constellation of Columba, about two degrees to the south and east of Gamma Caeli.[1] It was discovered on 10 May 1826 by Scottish astronomer James Dunlop, who described it as a "faint nebula".[8][9] The galaxy is a member of the NGC 1808 group, which is part of the larger Dorado Group.[8]

The morphological classification of this galaxy is (R)SAB(s)a,[6] which indicates a spiral galaxy with a weak-bar around the nucleus (SAB), no ring around the bar (s), an outer ring (R), and tightly-wound spiral arms (a). It is inclined by an angle of 57° to the line of sight from the Earth, with the long axis oriented at a position angle of 324°.[3] The disk of gas and stars shows a noticeable warp, and there is a pronounced asymmetry in the distribution of neutral hydrogen and H II regions.[10]

A Hubble Space Telescope image of the center of NGC 1808 (Credit: HST/NASA/ESA)

The core region contains a suspected weak active galactic nucleus plus a circumnuclear ring containing star clusters and supernova remnants at a distance of ~280 pc from the center. These form a ring of peculiar "hot spots".[11] It was formerly identified as a possible Seyfert galaxy,[3] but evidence now points to starburst activity in a ~500 pc radius around the center.[12] A probable outflow of gas is directed to the north-east from the nucleus, forming prominent dust lanes.[3] The high level of star formation in this galaxy and the nearby NGC 1792 may indicate a recent, distant tidal interaction between the two.[10]

One supernova has been observed in NGC 1808: SN 1993af (type Ia, mag. 17) was discovered by Marina Wischnjewsky on 15 November 1993 at 220″ east and 94″ north of the galactic nucleus.[13][14][15]

See also

References

  1. ^ a b Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. Vol. 1. Sky Publishing Corporation and the European Space Agency. ISBN 0-933346-84-0.
  2. ^ a b c d e "NASA/IPAC Extragalactic Database". Results for object NGC 1808. Retrieved 2007-04-05.
  3. ^ a b c d e Busch, Gerold; et al. (February 2017). "Star formation and gas flows in the centre of the NUGA galaxy NGC 1808 observed with SINFONI". Astronomy & Astrophysics. 598: 19. arXiv:1611.07868. Bibcode:2017A&A...598A..55B. doi:10.1051/0004-6361/201629440. S2CID 118950569. A55.
  4. ^ Armando, Gil de Paz; et al. (2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". Astrophysical Journal. 173 (2): 185–255. arXiv:astro-ph/0606440. Bibcode:2007ApJS..173..185G. doi:10.1086/516636. S2CID 119085482.
  5. ^ Tully, R. Brent; et al. (August 2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv:1605.01765. Bibcode:2016AJ....152...50T. doi:10.3847/0004-6256/152/2/50. S2CID 250737862. 50.
  6. ^ a b Erwin, Peter; Debattista, Victor P. (June 2013). "Peanuts at an angle: detecting and measuring the three-dimensional structure of bars in moderately inclined galaxies". Monthly Notices of the Royal Astronomical Society. 431 (4): 3060–3086. arXiv:1301.0638. Bibcode:2013MNRAS.431.3060E. doi:10.1093/mnras/stt385.
  7. ^ Paturel, G.; et al. (December 2003). "HYPERLEDA. I. Identification and designation of galaxies". Astronomy and Astrophysics. 412: 45–55. Bibcode:2003A&A...412...45P. doi:10.1051/0004-6361:20031411.
  8. ^ a b O'Meara, Stephen James (2013), Deep-Sky Companions: Southern Gems, Cambridge University Press, p. 116, Bibcode:2013dcsg.book.....O, ISBN 978-1107015012
  9. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 1808". Celestial Atlas. Retrieved 7 December 2024.
  10. ^ a b Dahlem, M.; et al. (July 2001). "A search for intergalactic H I gas in the NGC 1808 group of galaxies". Astronomy and Astrophysics. 373 (2): 485–493. arXiv:astro-ph/0106050. Bibcode:2001A&A...373..485D. doi:10.1051/0004-6361:20010614. S2CID 15512721.
  11. ^ Salak, Dragan; et al. (May 2016). "Gas Dynamics and Outflow in the Barred Starburst Galaxy NGC 1808 Revealed with ALMA". The Astrophysical Journal. 823 (1): 28. arXiv:1603.05881. Bibcode:2016ApJ...823...68S. doi:10.3847/0004-637X/823/1/68. S2CID 118634377. 68.
  12. ^ Salak, Dragan; et al. (November 2017). "Evolution of Molecular Clouds in the Superwind Galaxy NGC 1808 Probed by ALMA Observations". The Astrophysical Journal. 849 (2): 20. arXiv:1710.01829. Bibcode:2017ApJ...849...90S. doi:10.3847/1538-4357/aa91cb. S2CID 119456694. 90.
  13. ^ Hamuy, M.; et al. (November 1993). Green, D. W. E. (ed.). "Supernovae 1993af, 1993ag, 1993ah". IAU Circular. 5895: 1. Bibcode:1993IAUC.5895....1H.
  14. ^ Hamuy, M.; et al. (December 1996). "BVRI Light Curves for 29 Type IA Supernovae". Astronomical Journal. 112: 2408. arXiv:astro-ph/9609064. Bibcode:1996AJ....112.2408H. doi:10.1086/118192. S2CID 119520520.
  15. ^ "SN 1993af". Transient Name Server. IAU. Retrieved 7 December 2024.
  16. ^ "HubbleSite - NewsCenter - Hubble Captures the Heart of Star Birth". Retrieved 2007-04-05.

Read other articles:

Liga Utama Garena

Liga Utama GarenaOlahragaLeague of LegendsMusim awal2012PemilikGarenaJumlah tim5NegaraTemplat:Country data Asia TenggaraAsia Tenggara(termasuk Taiwan, Hong Kong, Makau sebelum 2015 dan Vietnam sebelum 2018)LokasiBeragamJuaraterkini Ascension GamingJuara terbanyak Taipei AssassinsKualifikasi LGS LCM PGS SLS TPLMitra televisiGarena Live, YouTubeSponsorRiot Games, GarenaLevel pada piramidaTier 1Piala internasionalMid Season InvitationalRift RivalsWorld ChampionshipKompetisi terkaitLeague of Lege...

 

نهر لا فوا (كاليدونيا الجديدة)

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (يناير 2023) نهر لا فوا (كاليدونيا الجديدة) المنطقة البلد فرنسا  الخصائص تعديل مصدري - تعديل   نهر لا فوا هو نهر يقع في كاليدونيا الجديدة. تبلغ مساحة مستجمعه المائي 438 ...

 

Automated analyser

An automated analyser is a medical laboratory instrument designed to measure various substances and other characteristics in a number of biological samples quickly, with minimal human assistance. These measured properties of blood and other fluids may be useful in the diagnosis of disease. Roche Cobas 6000 Roche Cobas u 411 Beckman Chemistry analysers: Access (left); Synchron (right). Racks: for putting samples, quality controls or calibrations. Cobas 6000 These tubes are put in the racks for...

Saison 2010-2011 du LOSC Lille Métropole

Vous lisez un « article de qualité » labellisé en 2012. Saison 2010-2011du LOSC Lille Métropole Les joueurs du LOSC Lille Métropole défilant à la suite de leur victoire en Ligue 1.Généralités Couleurs Blanc et rouge Stade Stadium Lille Métropole18 154 places Président Michel Seydoux Entraîneur Rudi Garcia Résultats Championnat Champion 76 points (21V, 13N, 4D)(68 buts pour, 36 buts contre) Coupe de France VainqueurContre le Paris Saint-Germain (1-0) Coupe de la ...

 

Синелобый амазон

Синелобый амазон Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:ЗавропсидыКласс:Пт�...

 

Akechi Mitsuhide

A questa voce o sezione va aggiunto il template sinottico {{Militare}} Puoi aggiungere e riempire il template secondo le istruzioni e poi rimuovere questo avviso. Se non sei in grado di riempirlo in buona parte, non fare nulla; non inserire template vuoti. Akechi Mitsuhide Akechi Mitsuhide[1], 明智 光秀? (Mino, 10 marzo 1528 – Shimamoto, 2 luglio 1582), è stato un generale giapponese. Fu leader del clan Akechi e uno dei più importanti generali al servizio ...

B

  此條目介紹的是拉丁字母中的第2个字母。关于其他用法，请见「B (消歧义)」。   提示：此条目页的主题不是希腊字母Β、西里尔字母В、Б、Ъ、Ь或德语字母ẞ、ß。 BB b(见下)用法書寫系統拉丁字母英文字母ISO基本拉丁字母（英语：ISO basic Latin alphabet）类型全音素文字相关所属語言拉丁语读音方法 [b][p][ɓ](适应变体)Unicode编码U+0042, U+0062字母顺位2数值 2歷史發...

 

Herndon, Pennsylvania

Borough in Pennsylvania, United StatesHerndon, PennsylvaniaBoroughMain Street (PA 147) in Herndon,September 2015Location of Herndon in Northumberland County, Pennsylvania.HerndonLocation on Herndon in PennsylvaniaShow map of PennsylvaniaHerndonHerndon (the United States)Show map of the United StatesCoordinates: 40°42′15″N 76°50′36″W / 40.70417°N 76.84333°W / 40.70417; -76.84333CountryUnited StatesStatePennsylvaniaCountyNorthumberlandSettled1827Incorpor...

 

Marcel Vogel

American inventor, researcher, and mystic For the Swiss Olympic biathlete, see Marcel Vogel (biathlete). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Marcel Vogel – news · newspapers · books · scholar · JSTOR (August 2013) (Learn how and when to remove this message) Marcel VogelBorn(1917-04-14)April 14, 1...

大字 (数字)

この項目には、一部のコンピュータや閲覧ソフトで表示できない文字が含まれています（詳細）。 数字の大字（だいじ）は、漢数字の一種。通常用いる単純な字形の漢数字（小字）の代わりに同じ音の別の漢字を用いるものである。 概要 壱万円日本銀行券（「壱」が大字） 弐千円日本銀行券（「弐」が大字） 漢数字には「一」「二」「三」と続く小字と、「壱」「�...

 

Frankie Laine, Balladeer

1959 studio album by Frankie LaineFrankie Laine, BalladeerStudio album by Frankie LaineReleased1959LabelColumbiaFrankie Laine chronology You Are My Love(1959) Frankie Laine, Balladeer(1959) Hell Bent for Leather!(1961) Professional ratingsReview scoresSourceRatingAllMusic[1] Frankie Laine, Balladeer is a studio album by Frankie Laine released in 1959 on Columbia Records.[2] Track listing Side oneNo.TitleWriter(s)Length1.Rocks and GravelA. LomaxRevised lyric: Leon Bibb&...

 

2016年美國總統選舉

2016年美國總統選舉 ← 2012 2016年11月8日 2020 → 538個選舉人團席位獲勝需270票民意調查投票率55.7%[1][2] ▲ 0.8 %   获提名人 唐納·川普 希拉莉·克林頓 政党 共和黨 民主党 家鄉州 紐約州 紐約州 竞选搭档 迈克·彭斯 蒂姆·凱恩 选举人票 304[3][4][註 1] 227[5] 胜出州/省 30 + 緬-2 20 + DC 民選得票 62,984,828[6] 65,853,514[6]...

CPFL Energia

Electric energy company in Brazil CPFL Energia S.A.Company typeSociedade AnônimaTraded asB3: CPFE3NYSE: CPLIbovespa ComponentIndustryElectricityFounded1912 (1912)HeadquartersCampinas, BrazilKey peopleGustavo Estrella (CEO)ProductsElectric powerServicesElectric power distributionRevenue US$ 8.0 billion (2017)[1]Net income US$ 362.0 million (2017)[2]Number of employees7,924ParentState Grid (83.71%)SubsidiariesCPFL RenováveisCPFL BrasilCPFL PiratiningaC...

 

Swiss order of precedence

Swiss government hierarchy Part of a series on theOrders of precedence Argentina Australia Bangladesh Barbados Belgium Brazil Brunei Canada Alberta British Columbia Manitoba Newfoundland and Labrador New Brunswick Nova Scotia Ontario Prince Edward Island Quebec Saskatchewan Yukon Chile China Hong Kong Colombia Denmark European Union Finland France Germany Greece Guatemala Holy See India Indonesia Ireland Ireland (1897–1922) (hist.) Isle of Man Israel Italy Jamaica Japan Lithuania Luxembourg...

 

ヨハネス12世 (ローマ教皇)

ヨハネス12世 第130代 ローマ教皇 教皇就任 955年12月16日教皇離任 964年5月14日先代 アガペトゥス2世次代 レオ8世個人情報出生 937年スポレート公国（中部イタリア）スポレート死去 964年5月14日 教皇領、ローマ原国籍 スポレート公国親 父アルベリーコ2世（スポレート公）、母アルダその他のヨハネステンプレートを表示 ヨハネス12世（Ioannes XII、937年 - 964年5月14日）は、ロ...

ماكوتو كوباياشي

  لمعانٍ أخرى، طالع ماكوتو كوباياشي (توضيح). ماكوتو كوباياشي (باليابانية: 小林誠)‏    معلومات شخصية الميلاد 7 أبريل 1944 (80 سنة)[1]  ناغويا  مواطنة اليابان  عضو في الأكاديمية اليابانية للعلوم  أقرباء توشيكي كايفو (biaoge)نوريو كايفو  [لغات أخرى]‏ (biaoge)...

 

Ganges Basin

Part of the Ganges-Brahmaputra basin Ganges-Brahmaputra-Meghna basins The Ganges Basin is a major part of the Ganges-Brahmaputra-Meghna (GBM) basin draining 1,999,000 square kilometres in Tibet, Nepal, India and Bangladesh. To the north, the Himalaya or lower parallel ranges beyond form the Ganges-Brahmaputra divide. On the west the Ganges Basin borders the Indus basin and then the Aravalli ridge. Southern limits are the Vindhyas and Chota Nagpur Plateau. On the east the Ganges merges with th...

 

Single-family zoning

Residential planning classification This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article needs to be updated. Please help update this article to reflect recent events or newly available information. (September 2021) The examples and perspective in this article deal primarily with the United States and do not represent a worldwide view of the subject. You may improve this article, ...

Lo Nuestro Awards

Spanish-language awards show honoring the best of Latin music Lo Nuestro AwardsCurrent: Premio Lo Nuestro 2024Awarded forrecognition of the most talented performers of Latin musicCountryUnited StatesPresented byUnivision (USA) Las Estrellas (Mexico) TeleOnce (Puerto Rico)First awarded1989Website[1] The Lo Nuestro Awards or Premios Lo Nuestro (Spanish for Ours) is a Spanish-language awards show honoring the best of Latin music, presented by Univision, a Spanish-language television network base...

 

عباس السيد

عباس السيد قائد كتائب القسام في الضفة الغربية   تبعه: إبراهيم حامد قائد لحركة حماس معلومات شخصية اسم الولادة عباس محمد مصطفى السيد  الميلاد 13 مايو 1966 (58 سنة)  طولكرم  مكان الاعتقال مصلحة السجون الإسرائيلية (8 مايو 2002–)  الإقامة طولكرم  مواطنة دولة فلسطين  نش...