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NGC 7814 (Little Sombrero Galaxy)


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NGC 7814
Little Sombrero Galaxy (リトル・ソンブレロ銀河)
Edge-on Spiral Galaxy (エッジオン銀河)
Gx Sab


別名 (Other names)
PGC 218, UGC 8, MCG 3-1-20, Caldwell 43

明るさ (Brightness)
10.8等級

星座 (Constellation)
ペガスス座 (Peg) (Pegasus)

距離 (Distance)
4,000万光年 (40 million light-years)

NGC 7814またはカルドウェル43は、ペガスス座の方角に約4,000万光年離れた位置にある渦巻銀河。
地球から見ると真横を向いている。
ソンブレロ銀河と似た形状でより小さいことから 、「リトル・ソンブレロ」と呼ばれることもある。
NGC 7814の背景の空間は、ハッブル・ディープ・フィールドと同様に、暗く遠い銀河が多く集まっている。

NGC 7814 (Little Sombrero Galaxy) is a spiral galaxy located 40 million light years from the Earth in the constellation Pegasus.

NGC 7814 (Little Sombrero Galaxy) : Picture

NGC 7814: The Little Sombrero in Pegasus
NGC 7814: The Little Sombrero in Pegasus
(C) Ken Crawford (Rancho Del Sol Obs.) Collaboration: David Martinez-Delgado ( ARI-ZAH, Univ. Heidelberg)
Point your telescope toward the high flying constellation Pegasus and you can find this expanse of Milky Way stars and distant galaxies. Centered on NGC 7814, the pretty field of view would almost be covered by a full moon. NGC 7814 is sometimes called the Little Sombrero for its resemblance to the brighter more famous M104, the Sombrero Galaxy. Both Sombrero and Little Sombrero are spiral galaxies seen edge-on, and both have extensive central bulges cut by a thinner disk with dust lanes in silhouette. In fact, NGC 7814 is some 40 million light-years away and an estimated 60,000 light-years across. That actually makes the Little Sombrero about the same physical size as its better known namesake, appearing to be smaller and fainter only because it is farther away. A very faint dwarf galaxy, potentially a satellite of NGC 7814, is revealed in the deep exposure just below the Little Sombrero.

NGC 7814
NGC 7814
(C) NOAO
This fantastic edge-on spiral galaxy in Pegasus proves to be an interesting object when displayed in the way shown. First, the plane of the galaxy is slightly warped and twisted. NGC 7814 is one of a few bright galaxies that shows this feature in optical wavelengths. Second the number of background galaxies in this direction is impressive. Besides being pretty, these far off beacons have been used by astronomers to try to determine the amount of gas and dust in the halo of NGC 7814. As the light of background galaxies passes through the foreground halo of NGC 7814 it becomes dimmer (redder). Finally, be certain to note the very slight deviation from being truly edge-on. The background dustlanes can be seen "above" and through the halo giving this galaxy more depth than is usually displayed.

NGC 7814
NGC 7814
(C) Hewholooks

NGC 7814 NGC 7814
NGC 7814
(C) NOAO
NGC 7814
(C) Hewholooks
NGC 7814: The Little Sombrero
NGC 7814: The Little Sombrero
(C) Ken Crawford
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NGC 7814 (Little Sombrero Galaxy) : Movie

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「ウィキペディア(wikipedia):フリー百科事典」より文章引用。
NGC 7814. (2013, May 31). In Wikipedia.
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