(2004a) and Bellazzini et al. Xoloz ( talk) 17:26, 16 March 2014 (UTC) Canis Major Dwarf Galaxy → Canis Major Overdensity – Whatever this is it is definitely an overdensity and this is the name it is discussed under in many sources. The brightest star in Canis Major, Sirius (Alpha Canis Majoris), is also the brightest star in the night sky. Tidal disruption causes a long 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 our galaxy three times. Line: 315 the Canis Major Overdensity. When projected on to the Galactic plane, it appears as an elongated and compact overdensity extending from l ~ 200° to 280° with a roundish core towards l ~ 240°. The discovery of the Canis Major Dwarf Galaxy 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. 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. The main body of the galaxy is extremely degraded. The CMa overdensity is located towards the Galac-tic anti-centre direction at roughly 8 kpc from the sun [Bellazinni et al. The Sirius star is in fact the brightest in the night sky and is situated in the constellation known as ‘Canis major' (The Greater Dog). Martin et al. 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 our galaxy three times. Several studies cast doubts on the true nature of this overdensity. The Canis Major overdensity is therefore highly unlikely to be due to the Galactic warp. The main body of the galaxy is extremely degraded. NGC 1261 is another nearby cluster, but its velocity is different enough from that of the others to make its relation to the system unclear. 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. Some research suggests that the trail of stars is actually part of the warped galactic thin disk and thick disc population and not a result of the collision of the Milky Way with a dwarf spheroidal galaxy. Globular clusters thought to be associated with the Canis Major Dwarf galaxy include NGC 1851, NGC 1904, NGC 2298 and NGC 2808, all of which are likely to be remnants of the galaxy's globular cluster system before its accretion, or swallowing, into the Milky Way. It is in the same part of the sky as the constellation Canis Major . [5] Some research suggests that the trail of stars is actually part of the warped galactic thin disk and thick disc population and not a result of the collision of the Milky Way with a dwarf spheroidal galaxy. (2004, 2006), the recently discovered Canis Major (CMa) structure appears as the strongest spatial overdensity of the whole Galactic disc in terms of either number density or statistical significance.The structure appears elongated along the tangential direction, extending from l ≈ 200° to 280°. The supposed small galaxy contains a relatively high percentage of red giant stars, and is thought to contain an estimated one billion stars in all. We conducted a medium resolution spectral survey on the BP stars (N=303) in CMa (centered at l = 238° ; b = -8°) using the data from AAOmega Spectrograph. Globular clusters thought to be associated with the Canis Major Dwarf galaxy 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. Function: view, File: /home/ah0ejbmyowku/public_html/application/controllers/Main.php Im an aspiring MBA student working hard to The Canis Major overdensity is therefore highly unlikely to be due to the Galactic warp, adding weight to the hypothesis that we are observing a disrupting dwarf galaxy or its remnants. Coordinates: 07h 12m 35.0s, −27° 40′ 00″, File: /home/ah0ejbmyowku/public_html/application/views/user/popup_modal.php [3] This structure is located closer to the Sun than the center of our galaxy, at approximately 7.7 kpc (25,000 ly) from the Sun. Function: _error_handler, File: /home/ah0ejbmyowku/public_html/application/views/page/index.php It has, therefore, only about 80 percent of the distance to the center of the Milky Way Sagittarius dwarf galaxy, which was regarded as … The supposed small galaxy contains a relatively high percentage of red giant stars, and is thought to contain an estimated one billion stars in all. The Canis Major dwarf galaxy ( CMa dwarf) or Canis Major overdensity ( CMa overdensity) is a disputed dwarf irregular galaxy in the Local Group. Stephen Baxter included the Canis Major Overdensity in his novella "Mayflower II" as the destination of the eponymous starship. 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. A&A 430, L13 L16(2005) DOI: 10.1051 /0004-6361:200400118 c ESO 2005 Astronomy & Astrophysics UVES observations of the Canis Major overdensity L. Sbordone 1,3,P.Bonifacio2, G. Marconi 1,S.Zaggia2, and R. Buonanno 3 1 ESO - European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago de Chile e-mail: lsbordon@eso.org 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. This structure is located closer to the Sun than the center of our galaxy, at approximately 7 kpc from the Sun. 1911-1915. The Canis Major dwarf galaxy ( CMa dwarf) or Canis Major overdensity ( CMa overdensity) is a disputed dwarf irregular galaxy in the Local Group. The team of astronomers that discovered it were 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. [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. Line: 107 1 Introduction. The Canis Major Dwarf Galaxy, also known as the Canis Major Overdensity, is an irregular galaxy that is thought to be the closest neighboring galaxy to our solar system. Bibliographic Code: 2006MNRAS.369.1911L Thor’s Helmet (NGC 2359) is an emission nebula that closely resembles a Viking helmet. CMa overdensity would thus be an interesting candidate for DM detection. 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. Canis Major turns out to be the strongest and the most spatially confined overdensity of the whole Galactic disc, in terms of both number density and statistical significance. Are you sure you want to cancel your membership with us? The supposed small galaxy contains a relatively high percentage of red giants, and is thought to contain an estimated one billion stars in all. Line: 208 We present DECam imaging combined with Gaia DR2 data to study the Canis Major overdensity. Is Palomar 1 Really Associated With the Canis Major Overdensity @article{Saviane2011IsP1, title={Is Palomar 1 Really Associated With the Canis Major Overdensity}, author={I. Saviane and L. Monaco and M. Correnti and P. Bonifacio and D. G. E. S. Observatory and Chile. Canis Major Overdensity. This structure is located closer to the Sun than the center of our galaxy, at approximately 7 kpc from the Sun. Pretty apt for an unregistered Animagus who relied on his ability to turn into a dog to escape numerous sticky situations, including escaping from the allegedly unescapable Azkaban. This could reflect the possibility that the Warp has a peculiar structure at this location, that we are observing an outer spiral arm, or that this overdensity is the remnant of an accreted dwarf galaxy. [4] The stream of stars was discovered in the early 21st century by astronomers conducting the Sloan Digital Sky Survey. The existence of a strong elliptical-shaped stellar over-density 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. 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