Messier Index/M106

Messier 106 350px M106 taken at St. Francis Xavier University. Composite of IR, x-ray, radio and visible light view (X-ray - blue, Optical - gold, IR - red, Radio - purple) w:J2000 SAB(s)bcNASA/IPAC Extragalactic Database Results for Messier 106 http://nedwww.ipac.caltech.edu/ 2006-12-07 12 18 57.5 +47 18 14 23.7 ± 1.5 Mly (7.3 ± 0.5 Mpc)J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances Astrophysical Journal 2001 546 2 681–693 http://adsabs.harvard.edu/abs/2001ApJ...546..681T 10.1086/318301Macri, L. M.; Stanek, K. Z.; Bersier, D.; Greenhill, L. J.; Reid, M. J. A New Cepheid Distance to the Maser-Host Galaxy NGC 4258 and Its Implications for the Hubble Constant The Astrophysical Journal 2006 652 2 1133–1149 http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...652.1133M 10.1086/508530 448 ± 3 km/s 9.1 18′.6 × 7′.2 w:Canes Venatici Maser galaxy,Bonanos, Alceste Z. Eclipsing Binaries: Tools for Calibrating the Extragalactic Distance Scale Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, held 22-25 August, 2006 in Prague, Czech Republic, S240, #008 2006 http://arxiv.org/abs/astro-ph/0610923 Seyfert II galaxyHumphreys, E. M. L.; Greenhill, L. J.; Reid, M. J.; Argon, A. L.; Moran, J. M. Improved Maser Distance to NGC 4258 American Astronomical Society Meeting 205, #73.01; Bulletin of the American Astronomical Society 2004 36 1468 http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004AAS...205.7301H M 106, NGC 4258, UGC 7353, PGC 39600 Messier 106 (also known as NGC 4258) is a w:spiral galaxy in the w:constellation w:Canes Venatici. It was discovered by w:Pierre Méchain in w:1781. M106 is at a distance of about 22 to 25 million w:light-years away from w:Earth. It is also a Seyfert II galaxy, which means that due to w:x-rays and unusual w:emission lines detected, it is suspected that part of the galaxy is falling into a w:supermassive black hole in the center. http://antwrp.gsfc.nasa.gov/apod/ap000215.html A spiral galaxy with a strange core w:NGC 4217 is a possible companion galaxy of Messier 106.SIMBAD Astronomical Database Results for Messier 106 http://simbad.u-strasbg.fr/Simbad 2006-12-07 thumb|left|500px|Amateur Image of Messier 106 Showing Possible Companion Spiral NGC 4217 Lower Right Courtesy Hunter Wilson Characteristics M106 has a water vapor w:maser that is seen by the 22GHz line of ortho-H2O that evidences dense and warm molecular gas. Water masers are useful to observe nuclear w:accretion disks in w:active galaxies. M106 has a slightly warped, thin, almost edge-on w:Keplerian disk which is on a subparsec scale. It surrounds a central area with mass four × 107M⊙.Henkel, C.; Peck, A. B.; Tarchi, A.; Nagar, N. M.; Braatz, J. A.; Castangia, P.; Moscadelli, L. New H2O masers in Seyfert and FIR bright galaxies Astronomy and Astrophysics June 2005 436 1 75–90 http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005A%26A...436...75H 10.1051/0004-6361:20042175 External links Spiral Galaxy M106 @ SEDS Messier pages 4/10/07: M106 - Mystery Spiral Arms Explained? The X-ray/radio-visible extra spiral arms in M106/NGC 4258. Spiral Galaxy Messier 106 (NGC 4258) at the astro-photography site of Mr. Takayuki Yoshida. M106 image taken by Stargazer Observatory References