The Canis Major Overdensity (CMa Overdensity) or Canis Major Dwarf Galaxy (CMa Dwarf) is a disputed dwarf irregular galaxy in the Local Group, located in the same part of the sky as the constellation Canis Major.
The supposed small galaxy contains a relatively high percentage of red giants and is thought to contain an estimated one billion stars in all.
At the time of its announcement, the Canis Major Dwarf Galaxy is classified as an irregular galaxy and is thought to be the closest neighboring galaxy to the Earth's location in the Milky Way, being located about 25,000 light-years (7.7 kiloparsecs) away from the Solar System[2] and 42,000 ly (13 kpc) from the Galactic Center. It has a roughly elliptical shape and is thought to contain as many stars as the Sagittarius Dwarf Elliptical Galaxy, the previous contender for closest galaxy to Earth, though later studies disputed this conclusion.
The existence of a strong elliptical-shaped stellar overdensity was reported in November 2003 by an international team of French, Italian, British, and Australian astronomers, who claimed their study pointed to a newly discovered dwarf galaxy: the Canis Major Dwarf Galaxy.[3] This structure is located closer to the Sun than the center of this galaxy, at approximately 7.7 kpc (25,000 ly) from the Sun.
The team of astronomers that discovered it was collaborating on analysis of data from the Two-Micron All Sky Survey (2MASS), a comprehensive survey of the sky in infrared light, which is not blocked by gas and dust as severely as visible light. Because of this technique, scientists were able to detect a very significant overdensity of class M giant stars in a part of the sky occupied by the Canis Major constellation, along with several other related structures composed of this type of star, two of which form broad, faint arcs.
Some astronomers believe that the CMa overdensity is a dwarf galaxy in the process of being pulled apart by the gravitational field of the more massive Milky Way galaxy. The main body of the CMa is extremely degraded. Tidal disruption causes a filament of stars to trail behind it as it orbits the Milky Way, forming a complex ringlike structure, sometimes referred to as the Monoceros Ring, which wraps around the Milky Way three times,[4] The stream of stars was discovered in the early 21st century by astronomers conducting the Sloan Digital Sky Survey. The Monoceros Ring is similar to the Virgo Stellar Stream which is thought to be the result of the Milky Way tearing stars and gases from the Sagittarius Dwarf Spheroidal Galaxy into a Stellar Stream. It was in the course of investigating the Monoceros Ring, and a closely spaced group of globular clusters similar to those associated with the Sagittarius Dwarf Elliptical Galaxy, that the CMa Overdensity was discovered.
Globular clusters thought to be associated with the CMa include NGC 1851, NGC 1904, NGC 2298 and NGC 2808, all of which may have been part of the galaxy's globular cluster system before accreting into the Milky Way. NGC 1261 is another nearby cluster, but its velocity differs enough to make its relationship to the system unclear. Additionally, Dolidze 25 and H18 are open clusters that may have formed when the dwarf galaxy perturbed material in the galactic disk, stimulating star formation.[3]
The discovery of the CMa and subsequent analysis of the stars associated with it has provided some support for the current theory that galaxies may grow in size by swallowing their smaller neighbors. Martin et al.[3] believe that the preponderance of evidence points to the accretion of a small satellite galaxy of the Milky Way which was orbiting roughly in the plane of the galactic disk.
Several studies cast doubts on the true nature of this overdensity.[5] Some research suggests that the trail of stars is actually part of the warped galactic thin disk and thick disk population and not a result of the collision of the Milky Way with a dwarf spheroidal galaxy.[6] Investigation of the area in 2009 yielded only ten RR Lyrae variable stars which is consistent with the Milky Way's halo and thick disk populations rather than a separate dwarf spheroidal galaxy.[7]
British science fiction writer Stephen Baxter included the Canis Major Overdensity in his novella "Mayflower II" as the destination of the eponymous starship.
Jalur kereta api Wonokromo–BangilIkhtisarJenisJalur lintas utamaSistemJalur kereta api rel beratStatusBeroperasiLokasiJawa TimurTerminusWonokromoBangilOperasiDibuka16 Mei 1878PemilikDirektorat Jenderal PerkeretaapianOperatorPT Kereta Api IndonesiaDaerah Operasi VIII Surabaya KAI Commuter DepoSidotopoData teknisJenis relR42, R54Lebar sepur1.067 mmKecepatan operasi60 s.d. 80 km/jam Peta rute Legenda WO–SB ke Surabaya Gubeng, Surabaya Pasarturi, Surabaya Kota, Sidotopo WO Wonokromo S J A …
Nintendo Co., Ltd.Lambang Nintendo, digunakan sejak 2016.Kantor Pusat Nintendo di Kyoto.Nama asli任天堂株式会社Nama latinNintendō kabushikigaishaSebelumnyaYamauchi Nintendo & Co. (1933–1951)Nintendo Playing Card Co. Ltd. (1951–1963)JenisPublikKode emitenNasdaq: NTDOYNasdaq: NTDOFTYO: 7974ISINJP3756600007IndustriIndustri permainan videoElektronik konsumenDidirikan23 September 1889; 134 tahun lalu (1889-09-23)PendiriFusajiro YamauchiKantorpusatKyoto, JepangWilayah op…
Vietnamese photographer (born 1983) In this Vietnamese name, the surname is Trần, but is often simplified to Tran in English-language text. In accordance with Vietnamese custom, this person should be referred to by the given name, Tuan Viet. Trần Tuấn ViệtTran Tuan Viet in 2018Born1983Vinh, Nghệ An Province, VietnamEducationNational University of Civil EngineeringOccupationPhotographerYears active2007–present Trần Tuấn Việt is a Vietnamese photographer, known as the man wh…
Savigny-lès-Beaune Savigny-lès-Beaune (Frankreich) Staat Frankreich Region Bourgogne-Franche-Comté Département (Nr.) Côte-d’Or (21) Arrondissement Beaune Kanton Ladoix-Serrigny Gemeindeverband Beaune Côte et Sud Koordinaten 47° 4′ N, 4° 49′ O47.0636111111114.8183333333333Koordinaten: 47° 4′ N, 4° 49′ O Höhe 229–577 m Fläche 35,98 km² Einwohner 1.288 (1. Januar 2020) Bevölkerungsdichte 36 Einw./km² Postleitzahl 2142…
Department of Environment and Local GovernmentAgency overviewFormed15 March 2012 (2012-03-15)JurisdictionNew BrunswickParent departmentGovernment of New BrunswickThe Department of Environment and Local Government is a part of the Government of New Brunswick. It is charged with maintaining relationships with New Brunswick's municipalities, administering its unincorporated Local Service Districts and the administration of its environmental policy, including the Province's Environmen…
Cet article est une ébauche concernant une localité italienne et la Ligurie. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Albisola Superiore Armoiries Drapeau Administration Pays Italie Région Ligurie Province Savone Code postal 17013 Code ISTAT 009004 Code cadastral A166 Préfixe tel. 019 Démographie Gentilé albisolesi Population 10 581 hab. (31-12-2010[1]) Densité 365 hab./km2 G…
Association football club in Israel Beitar Jerusalem redirects here. For basketball team, see Beitar Jerusalem B.C. For women's team, see Beitar Jerusalem F.C. (women). For the Revisionist Zionist youth movement, see Betar. Football clubBeitar Jerusalem FCFull nameBeitar Jerusalem Football ClubNickname(s)BeitarThe MenorahThe Lions from the CapitalThe Flag of the StateShort nameBEIFounded1936; 87 years ago (1936)GroundTeddy Stadium, JerusalemCapacity31,733OwnerBarak AbramovCoach…
هذه مقالة غير مراجعة. ينبغي أن يزال هذا القالب بعد أن يراجعها محرر مغاير للذي أنشأها؛ إذا لزم الأمر فيجب أن توسم المقالة بقوالب الصيانة المناسبة. يمكن أيضاً تقديم طلب لمراجعة المقالة في الصفحة المخصصة لذلك. (مارس 2020) هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا…
Bambu Hutan bambu di Kyoto, Jepang Klasifikasi ilmiah Kerajaan: Plantae (tanpa takson): Angiospermae (tanpa takson): Monokotil (tanpa takson): Commelinids Ordo: Poales Famili: Poaceae Subfamili: Bambusoideae Tribus Arundinarieae Bambuseae Olyreae Diversitas[1] >1,462 (spesies diidentifikasi) spesies dalam 115 genera Sinonim[2] Olyroideae Pilg. (1956) Parianoideae Butzin (1965) Bambu, buluh, atau aur adalah tumbuhan berbunga menahun hijau abadi dari subfamili Bambusoideae yang …
عبد الجبار الراوي عبد الجبار الراوي في أربعينات القرن العشرين معلومات شخصية تاريخ الميلاد سنة 1898 الوفاة سنة 1987 (88–89 سنة) بغداد الحياة العملية المهنة عسكري تعديل مصدري - تعديل ولد عبد الجبار عبد الله أحمد الراوي في راوة في محافظة الأنبار غرب العراق عام 1898. ش…
Sporting event delegationBotswana at the1984 Summer OlympicsIOC codeBOTNOCBotswana National Olympic Committeein Los AngelesCompetitors7 (7 men and 0 women) in 2 sportsFlag bearer Norman MangoyeMedals Gold 0 Silver 0 Bronze 0 Total 0 Summer Olympics appearances (overview)198019841988199219962000200420082012201620202024 Botswana competed at the 1984 Summer Olympics in Los Angeles, United States. Results by event Athletics Men's 400 metres Joseph Ramotshabi Heat — 48.11 (→ did not adva…
Piala Thomas dan Uber 2012Informasi turnamenEdisiThomas: ke-27Uber: ke-24LevelInternasionalJadwalpenyelenggaraan20–27 Mei 2012TempatpenyelenggaraanPusat Olahraga Wuhan Wuhan, TiongkokNegaraThomas: 12Uber: 12Hasil turnamenThomas TiongkokUber Tiongkok ← 2010 2014 → Piala Thomas dan Uber 2012 adalah penyelenggaraan bersama turnamen bulu tangkis Piala Thomas dan Piala Uber. Kompetisi ini menjadi edisi ke-27 Piala Thomas dan edisi ke-24 Piala Uber. Putaran final turnamen ini diselengg…
Auwines adalah seorang pengusaha restoran asal Indonesia. Putra Minangkabau asal Sungai Puar, Agam, Sumatera Barat ini merupakan pendiri jaringan Restoran Padang Sari Ratu. Ratu merujuk pada nama Ratu Plaza. Restorannya merupakan pioner rumah makan Padang di dalam plaza.[1] Pada mulanya ia merupakan pengusaha tekstil. Karena istrinya, Rosmaiyar pandai memasak, ia berpindah haluan ke bisnis rumah makan. Bisnis ini dimulainya pada tanggal 20 Maret 1982, dengan mendirikan resto pertama di R…
Christian virgin and saint For other uses, see Saint Agnes (disambiguation). SaintAgnes of RomeSaint Agnes by Domenichino (c. 1620)Virgin and martyrBornc. 291Rome, ItalyDiedc. 304Rome, ItalyVenerated inCatholic Church, Eastern Orthodox Churches, Oriental Orthodox Churches, Anglican Churches, and Lutheran Churches.CanonizedPre-congregationMajor shrineChurch of Sant'Agnese fuori le mura and the Church of Sant'Agnese in Agone, both in RomeFeast21 January; before Pope John XXI…
Human settlement in EnglandHyson GreenJunction of Radford Road and Berridge RoadHyson GreenLocation within NottinghamshireDistrictCity of NottinghamShire countyNottinghamshireRegionEast MidlandsCountryEnglandSovereign stateUnited KingdomPost townNOTTINGHAMPostcode districtNG7Dialling code0115PoliceNottinghamshireFireNottinghamshireAmbulanceEast Midlands UK ParliamentNottingham East List of places UK England Nottinghamshire 52°57′59″N 1°10′16″W / …
5ª Divisão de Infantaria País Império do Japão Corporação Exército imperial japonês Missão Infantaria Unidade Divisão Criação 14 de maio de 1888 Extinção setembro de 1945 História Guerras/batalhas Segunda Guerra Mundial A 5ª Divisão foi uma divisão de infantaria do Império do Japão que serviu durante a Segunda Guerra Mundial. A divisão foi formada 14 de maio de 1888 em Kumamoto, sendo desmobilizada no mês de setembro de 1945 com fim da guerra.[1] Comandantes Co…
This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.Find sources: Saint Kitts and Nevis–Spain relations – news · newspapers · books · scholar · JSTOR (November 2021) Bilateral relationsSaint Kitts and Nevis-Spain relations Saint Kitts and Nevis Spain Saint Kitts and Nevis–Spain relations are the bilateral and diplo…
Indian comedian SaptagiriSaptagiri in 2016BornVenkata Prabhu Prasad[1] (1989-05-01) 1 May 1989 (age 34)[2]Irala, Andhra Pradesh, India[1]OccupationsActorcomedianYears active2006–present Venkata Prabhu Prasad (born 1 May 1989), known professionally as Saptagiri, is an Indian actor and comedian who works in Telugu films. He received Nandi Award as Best Male Comedian for his role in Express Raja (2016).[3][4] He received Santosham Allu Ramalingaia…
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 additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: S. Rajandram – news · newspapers · books · scholar · JSTOR (July 2021) (Learn how and when to remove this temp…
Para otros usos de este término, véase Péndulo (desambiguación). Pendulo Studios, S.L. Tipo Empresa privadaIndustria VideojuegosForma legal empresa privadaFundación España España (1994)Sede central Madrid, EspañaProductos Igor: Objetivo UikokahoniaHollywood MonstersRunaway: A Road AdventureRunaway 2: The Dream Of The TurtleRunaway 3: A Twist of FateHollywood Monsters 2New York CrimesHidden RunawaySitio web http://www.pendulostudios.com[editar datos en Wikidata] Pendulo Stu…
Lokasi Pengunjung: 18.116.43.95