Kiso 5639 (also known as LEDA 36252, KUG 1138+327 or the Skyrocket Galaxy) is an irregular dwarf galaxy in the constellation Ursa Major, approximately 85 million light-years from Earth.[1] It has an elongated and flattened shape, with a maximum diameter that extends for approximately 2,700 light years.[2] The new stars are distributed in about ten groups and have a mass corresponding to about one million solar masses. This intense activity also corresponds to the presence of areas in which the matter is rarefied, which were probably formed following a combination of stellar winds and supernovae explosions.[3] The starburst of the galaxy is believed to have occurred around one million years ago.[4]
| Kiso 5639 | |
|---|---|
 Kiso 5639, photographed by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 41m 07.5s |
| Declination | +32° 25′ 37″ |
| Redshift | z = 0,00606 |
| Heliocentric radial velocity | 1.796 km/s |
| Distance | 85 million ly |
| Characteristics | |
| Type | Dwarf galaxy, starburst galaxy |
| Size | 2,700 ly |
| Other designations | |
| LEDA 36252
KUG 1138+327 SDSS J114107.48+322537.2 SDSS J114107.49+322537.3 The Skyrocket Galaxy | |
References: [1] | |
Etymology
editKiso 5639 has been referred to as the Skyrocket Galaxy, an informal name due to it being described as resembling a "July 4th skyrocket" by NASA.[2] It has also been informally called the Rocket Galaxy due to its "tail" structure and brightness at the head.[2][5]
Morphology
editKiso 5639 has an extremely irregular shape. At the head is an intense concentration of stars compared to the rest of the galaxy,[6] such that it resembles a tadpole.[7] This area of high intensity is determined by the presence of abundant concentrations of hydrogen gas and intense star formation activity.[4] The galaxy has an elongated and flattened "pancake"[8] shape, with a maximum diameter that extends for approximately 2,700 light years.[2]
Discovery
editKiso 5639 was discovered in 2004 using the Hubble Space Telescope, and was further observed in February and July of 2015 with the Wide Field Camera 3.[2]
Star formation
editFaint areas of star formation are present in other parts of the galaxy, with stellar elements ranging in age from several million to a few billion years.[2] These data were collected from observations made by the Hubble Space Telescope during 2015 and were published in The Astrophysical Journal.[9] The starburst is believed to have begun approximately one million years ago following the galaxy's encounter with a filament of intergalactic gas.[4] The new stars in the galaxy are distributed in about ten groups and have a mass corresponding to about one million solar masses.[citation needed]
Gallery
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See also
editReferences
edit- ^ a b Almeida, J. Sanchez; Munoz-Tunon, C.; Elmegreen, D. M.; Elmegreen, B. G.; Mendez-Abreu, J. (2013-03-26). "Local tadpole galaxies: dynamics and metallicity". The Astrophysical Journal. 767 (1): 74. arXiv:1302.4352. Bibcode:2013ApJ...767...74S. doi:10.1088/0004-637X/767/1/74. ISSN 0004-637X.
- ^ a b c d e f "Hubble Reveals Stellar Fireworks in 'Skyrocket' Galaxy". science.nasa.gov. June 28, 2016. Retrieved 2024-04-17.
- ^ Elmegreen, Debra Meloy; Elmegreen, Bruce G.; Almeida, Jorge Sanchez; Munoz-Tunon, Casiana; Mendez-Abreu, Jairo; Gallagher, John S.; Rafelski, Marc; Filho, Mercedes; Ceverino, Daniel (2016-07-10). "Hubble Space Telescope Observations of Accretion-Induced Star Formation in the Tadpole Galaxy Kiso 5639". The Astrophysical Journal. 825 (2): 145. arXiv:1605.02822. Bibcode:2016ApJ...825..145E. doi:10.3847/0004-637X/825/2/145. ISSN 0004-637X.
- ^ a b c "KISO 5639 Tadpole Galaxy". EurekAlert!. Retrieved 2024-04-17.
- ^ Elmegreen, Debra Meloy; Elmegreen, Bruce G.; Sánchez Almeida, Jorge; Muñoz-Tuñón, Casiana; Mendez-Abreu, Jairo; Gallagher, John S.; Rafelski, Marc; Filho, Mercedes; Ceverino, Daniel (2016-07-01). "Hubble Space Telescope Observations of Accretion-Induced Star Formation in the Tadpole Galaxy Kiso 5639". The Astrophysical Journal. 825 (2): 145. arXiv:1605.02822. Bibcode:2016ApJ...825..145E. doi:10.3847/0004-637X/825/2/145. ISSN 0004-637X.
- ^ Wall, Mike (2016-07-04). "Cosmic fireworks: Hubble snaps stunning photo of "skyrocket" galaxy - CBS News". www.cbsnews.com. Retrieved 2024-04-19.
- ^ Now, Astronomy. "Kiso 5639 – Astronomy Now". Retrieved 2024-04-18.
- ^ Plait, Phil (2016-07-03). "A Cosmic Tadpole Swims Into Hubble's View". Slate. ISSN 1091-2339. Retrieved 2024-04-18.
- ^ "Kiso 5639: Hubble Space Telescope Photographs Cosmic Tadpole | Sci.News". Sci.News: Breaking Science News. 2016-06-29. Retrieved 2024-04-17.
Further reading
edit- Elmegreen, Bruce G.; Herrera, Cinthya; Rubio, Monica; Elmegreen, Debra Meloy; Almeida, Jorge Sánchez; Muñoz-Tuñón, Casiana; Olmo-Garcia, A. (2018-05-31). "NOEMA Observations of a Molecular Cloud in the Low-metallicity Galaxy Kiso 5639". Astrophysical Journal Letters. 859 (2): L22. arXiv:1805.08253. Bibcode:2018ApJ...859L..22E. doi:10.3847/2041-8213/aac6be.
- Wang, Q. Daniel (2022-09-01). "The tadpole galaxy Kiso 5639: a laboratory for high-energy astrophysics of metal-poor starburst". Chandra Proposal: 6336. Bibcode:2022cxo..prop.6336W.