Palomar 1
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Globular cluster Palomar 1 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Cepheus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 03 h 33 m 20.04 s |
| declination | + 7934 ° 51.8 ′ |
| Appearance | |
| Concentration class | XII |
| Brightness (visual) | +13.18 mag |
| Angular expansion | 2′.8 |
| Physical data | |
| distance | 36.5 ± 4.2 years |
| diameter | 30 ly |
| Age | 6.3 to 8 billion years |
| Metallicity [Fe / H] | −0.60 |
| history | |
| discovery | George Ogden Abell |
| Discovery date | 1954 |
| Catalog names | |
| LEDA 13165 | |
Palomar 1 is a globular cluster in the constellation Cepheus in the northern sky. It is an estimated 35,000 light-years from the solar system on the outskirts of the Milky Way and has a diameter of about 30 ly.
With an age of 6.3 to 8 billion years, it is younger than other globular clusters in the Milky Way. The heap has a high metallicity with [Fe / H] = −0.60.
It is assumed that Palomar 1 has a similar history of formation to globular clusters from the Sagittarius dwarf galaxy , for example Terzan 7 , and that it also originates from this and was snatched from it by tidal forces.
The object was discovered in 1954 by the astronomer George Ogden Abell in the images of the Palomar Observatory Sky Survey , and cataloged as a globular cluster.
Individual evidence
- ↑ Ryan Goldsbury, Harvey B. Richer, Jay Anderson, Aaron Dotter, Ata Sarajedini, Kristin Woodley: The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters . In: The Astronomical Journal . 140, No. 6, December 2010, pp. 1830-1837. arxiv : 1008.2755 . bibcode : 2010AJ .... 140.1830G . doi : 10.1088 / 0004-6256 / 140/6/1830 .
- ↑ a b c A. Rosenberg, I. Saviane, G. Piotto, A. Aparicio, SR Zaggia: Palomar 1 - Another young Galactic halo globular cluster . In: Astronomical Journal . 115, No. 2, 1998, p. 648. arxiv : astro-ph / 9710242 . bibcode : 1998AJ .... 115..648R . doi : 10.1086 / 300200 .
- ↑ 2 × distance × sin (diameter_angle / 2) = 30 ly. Diameter
- ↑ SIMBAD Astronomical Object Database . In: Results for Palomar 1 . Retrieved November 17, 2006.
- ↑ a b van den Bergh, Sidney; Mackey, AD: Globular clusters and the formation of the outer Galactic halo . In: Monthly Notices of the Royal Astronomical Society . 354, No. 3, 2004, pp. 713-719. arxiv : astro-ph / 0407346 . bibcode : 2004MNRAS.354..713V . doi : 10.1111 / j.1365-2966.2004.08228.x .
- ↑ George O. Abell: Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey . In: Publications of the Astronomical Society of the Pacific . 67, No. 397, 1955, p. 258. bibcode : 1955PASP ... 67..258A . doi : 10.1086 / 126815 .