Astronomy:CX330

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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).[1] CX330 is a FU Orionis-type protostar undergoing episodic accretion outbursts, making it a unique laboratory for studying star formation in low-density environments.[2][3][4][5][6]

Discovery

CX330 was first detected in 2009 during a deep X-ray survey of the Galactic Center conducted with the Chandra X-ray Observatory.[7] The source, cataloged as CXOGBS J173643.8-282122, displayed hard X-ray emission characteristic of magnetically active pre-main-sequence stars.[4][1][8]

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.[4] Other observations are done using the Vista Variables in the Via Lactea (VVV) and Optical Gravitational Lensing Experiment (OGLE) survey.[9][10]

References

  1. ↑ 1.0 1.1 Britt, C. T.; Maccarone, T. J.; Green, J. D.; Jonker, P. G.; Hynes, R. I.; Torres, M. A. P.; Strader, J.; Chomiuk, L. et al. (2016-08-11). "Discovery of a long-lived, high-amplitude dusty infrared transient" (in en). Monthly Notices of the Royal Astronomical Society 460 (3): 2822–2833. doi:10.1093/mnras/stw1182. ISSN 0035-8711. 
  2. ↑ "The Loneliest Young Star - NASA" (in en-US). https://www.nasa.gov/image-article/loneliest-young-star/. 
  3. ↑ "Loneliest Young Star Seen by Spitzer and WISE | aavso". https://www.aavso.org/content/loneliest-young-star-seen-spitzer-and-wise. 
  4. ↑ 4.0 4.1 4.2 "Loneliest Young Star Seen by Spitzer and WISE" (in en-US). https://www.jpl.nasa.gov/news/loneliest-young-star-seen-by-spitzer-and-wise/. 
  5. ↑ Staff, News (2016-07-28). "Astronomers Spot Loneliest Young Star | Sci.News" (in en-US). https://www.sci.news/astronomy/loneliest-young-star-04062.html. 
  6. ↑ "CX330: Distant (and Isolated) Star Formation | Centauri Dreams". https://www.centauri-dreams.org/2016/07/28/cx330-distant-and-isolated-star-formation/. 
  7. ↑ Wevers, T.; Hodgkin, S. T.; Jonker, P. G.; Bassa, C.; Nelemans, G.; van Grunsven, T.; Gonzalez-Solares, E. A.; Torres, M. A. P. et al. (2016-06-01). "The Chandra Galactic Bulge Survey: optical catalogue and point-source counterparts to X-ray sources" (in en). Monthly Notices of the Royal Astronomical Society 458 (4): 4530–4546. doi:10.1093/mnras/stw643. ISSN 0035-8711. 
  8. ↑ Strom, Marcus (2016-07-28). "CX330: Galaxy's loneliest baby star discovered wandering far from stellar nurseries" (in en). https://www.smh.com.au/technology/cx330-galaxys-loneliest-baby-star-discovered-wandering-far-from-stellar-nurseries-20160728-gqfg1i.html. 
  9. ↑ Contreras Peña, C.; Lucas, P. W.; Kurtev, R.; Minniti, D.; Caratti o Garatti, A.; Marocco, F.; Thompson, M. A.; Froebrich, D. et al. (2017-03-01). "Infrared spectroscopy of eruptive variable protostars from VVV" (in en). Monthly Notices of the Royal Astronomical Society 465 (3): 3039–3100. doi:10.1093/mnras/stw2802. ISSN 0035-8711. 
  10. ↑ 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, Bibcode: 2015AcA....65....1U 



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