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CX330

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CX330

Artistic Representation of CX330 Star system
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ophiuchus[1]
Right ascension 17h 36m 43.99s[2]
Declination −28° 21′ 22.4″[2]
Characteristics
Evolutionary stage Young stellar object[2]
Spectral type ?
Variable type FU Ori
Astrometry
Distance25,000[2] ly
Other designations
CXOGBS J173643.8-282122, OGLE BLG653.19 81200[3]
Database references
SIMBADdata

CX330 (also known as CXOGBS J173643.8-282122) is an extremely isolated young stellar object (YSO) located in the central bulge of the Milky Way, approximately 25,000 light-years from Earth. Identified in 2009 through its X-ray emission, it is the most isolated known young star, situated over 1,000 light-years from the nearest star-forming region (nearest star-forming region from CX330 is NGC 6383 followed by Pipe Nebula and Corona Australis Molecular Cloud).[2] CX330 is a FU Orionis-type protostar undergoing episodic accretion outbursts, making it a unique laboratory for studying star formation in low-density environments.[4][5][6][7][8]

Discovery

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CX330 was first detected in 2009 during a deep X-ray survey of the Galactic Center conducted with the Chandra X-ray Observatory.[9] The source, cataloged as CXOGBS J173643.8-282122, displayed hard X-ray emission characteristic of magnetically active pre-main-sequence stars.[6][2][10]

Follow-up infrared observations with the Spitzer Space Telescope (2007) and WISE (2010) revealed a dramatic brightening of over 2 magnitudes in the mid-infrared, confirming an accretion outburst.[6] Other observations are done using the Vista Variables in the Via Lactea (VVV) and Optical Gravitational Lensing Experiment (OGLE) survey.[11][12]

References

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  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e f Britt, C. T.; Maccarone, T. J.; Green, J. D.; Jonker, P. G.; Hynes, R. I.; Torres, M. A. P.; Strader, J.; Chomiuk, L.; Salinas, R.; Lucas, P.; Contreras Peña, C.; Kurtev, R.; Heinke, C.; Smith, L.; Wright, N. J. (2016-08-11). "Discovery of a long-lived, high-amplitude dusty infrared transient". Monthly Notices of the Royal Astronomical Society. 460 (3): 2822–2833. arXiv:1605.05321. doi:10.1093/mnras/stw1182. ISSN 0035-8711.
  3. ^ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-01.
  4. ^ "The Loneliest Young Star - NASA". Retrieved 2025-11-01.
  5. ^ "Loneliest Young Star Seen by Spitzer and WISE | aavso". www.aavso.org. Retrieved 2025-11-01.
  6. ^ a b c "Loneliest Young Star Seen by Spitzer and WISE". NASA Jet Propulsion Laboratory (JPL). Archived from the original on 2025-09-28. Retrieved 2025-11-01.
  7. ^ Staff, News (2016-07-28). "Astronomers Spot Loneliest Young Star | Sci.News". Sci.News: Breaking Science News. Retrieved 2025-11-01. {{cite web}}: |first= has generic name (help)
  8. ^ "CX330: Distant (and Isolated) Star Formation | Centauri Dreams". www.centauri-dreams.org. Retrieved 2025-11-01.
  9. ^ Wevers, T.; Hodgkin, S. T.; Jonker, P. G.; Bassa, C.; Nelemans, G.; van Grunsven, T.; Gonzalez-Solares, E. A.; Torres, M. A. P.; Heinke, C.; Steeghs, D.; Maccarone, T. J.; Britt, C.; Hynes, R. I.; Johnson, C.; Wu, Jianfeng (2016-06-01). "The Chandra Galactic Bulge Survey: optical catalogue and point-source counterparts to X-ray sources". Monthly Notices of the Royal Astronomical Society. 458 (4): 4530–4546. arXiv:1605.02741. doi:10.1093/mnras/stw643. ISSN 0035-8711.
  10. ^ Strom, Marcus (2016-07-28). "CX330: Galaxy's loneliest baby star discovered wandering far from stellar nurseries". The Sydney Morning Herald. Retrieved 2025-11-01.
  11. ^ Contreras Peña, C.; Lucas, P. W.; Kurtev, R.; Minniti, D.; Caratti o Garatti, A.; Marocco, F.; Thompson, M. A.; Froebrich, D.; Kumar, M. S. N.; Stimson, W.; Navarro Molina, C.; Borissova, J.; Gledhill, T.; Terzi, R. (2017-03-01). "Infrared spectroscopy of eruptive variable protostars from VVV". Monthly Notices of the Royal Astronomical Society. 465 (3): 3039–3100. arXiv:1602.06269. doi:10.1093/mnras/stw2802. ISSN 0035-8711.
  12. ^ Udalski, A.; Szymański, M. K.; Szymański, G. (2015-04-22), "OGLE-IV: Fourth Phase of the Optical Gravitational Lensing Experiment", Acta Astronomica, 65 (1): 1, arXiv:1504.05966, Bibcode:2015AcA....65....1U