Pisces–Eridanus stellar stream
Pisces–Eridanus stellar stream is a close stellar stream, between 80 and 226 parsecs away, and stretching 120° across the sky, an open cluster that was stretched apart by past gravitational interactions. By analysis of the highest mass member stars, it is estimated to be only 120 million years old, a similar age to the Pleiades.[1][2]
According to a 2020 study, this stellar stream contains about 1400 stars moving together and has a mass of 770 M☉.[3]
Stars
[edit]The stream includes at least 6 naked eye stars: Lambda Tauri at 3.5 magnitude, 148 parsec distance; Omicron Aquarii at 4.7 magnitude, 134 parsec distance; 106 Aquarii at 5.2 magnitude, 114 parsec distance; 108 Aquarii at 5.2 magnitude, 98 parsec distance; Tau1 Aquarii at 5.7 magnitude, 97 parsec distance; and Nu Fornacis at 4.7 magnitude and 114 parsec distance.[citation needed]
| Star | HD | HR | HIP | Constellation | App. mag (V) | Dist. (ly) | Class | Notes |
|---|---|---|---|---|---|---|---|---|
| λ Tauri | 25204 | 1239 | 18724 | Taurus | 3.47 | 480 | B3 V | Brightest member; binary |
| ν Fornacis | 12767 | 612 | 9677 | Fornax | 4.69 | 370 | B9... | |
| ο Aquarii | 209409 | 8402 | 108874 | Aquarius | 4.71 | 440 | B7 IVe | |
| 108 Aquarii | 223640 | 9031 | 117629 | Aquarius | 5.19 | 319 | A0... | Peculiar; closest member |
| 106 Aquarii | 222847 | 8998 | 117089 | Aquarius | 5.24 | 370 | B9 V | |
| τ1 Aquarii | 215766 | 8673 | 112542 | Aquarius | 5.66 | 355 |
See also
[edit]References
[edit]- ^ a b Curtis, Jason L.; Agüeros, Marcel A.; Mamajek, Eric E.; Wright, Jason T.; Cummings, Jeffrey D. (1 August 2019). "TESS Reveals that the Nearby Pisces–Eridanus Stellar Stream is only 120 Myr Old". The Astronomical Journal. 158 (2): 77. arXiv:1905.10588. Bibcode:2019AJ....158...77C. doi:10.3847/1538-3881/ab2899. ISSN 0004-6256.
- ^ Hawkins, Keith; Lucey, Madeline; Curtis, Jason (1 August 2020). "The chemical nature of the young 120-Myr-old nearby Pisces–Eridanus stellar stream flowing through the Galactic disc". Monthly Notices of the Royal Astronomical Society. 496 (2): 2422–2435. arXiv:2003.04940. Bibcode:2020MNRAS.496.2422H. doi:10.1093/mnras/staa1673. ISSN 0035-8711.
- ^ Röser, Siegfried; Schilbach, Elena (2020-06-01). "A census of the nearby Pisces-Eridanus stellar stream - Commonalities with and disparities from the Pleiades". Astronomy & Astrophysics. 638: A9. arXiv:2002.03610. doi:10.1051/0004-6361/202037691. ISSN 0004-6361.
- Extended stellar systems in the solar neighborhood II. Discovery of a nearby 120° stellar stream in GaiaDR2 Stefan Meingast, João Alves, and Verena Fürnkranz. 17 January 2019
- Image of the Week: A river of stars
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