Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지
DOI QR코드

DOI QR Code

HIGH RESOLUTION OPTICAL SPECTRA OF HBC 722 AFTER OUTBURST

  • Lee, Jeong-Eun (Department of Astronomy and Space Science, Kyung Hee University) ;
  • Kang, Won-seok (Department of Astronomy and Space Science, Kyung Hee University) ;
  • Lee, Sang-Gak (Department of Physics and Astronomy, Seoul National University) ;
  • Sung, Hyun-Il (Korea Astronomy and Space Science Institute) ;
  • Lee, Byeong-Cheol (Korea Astronomy and Space Science Institute) ;
  • Sung, Hwan-kyung (Department of Astronomy and Space Science, Sejong University) ;
  • Green, Joel D. (Department of Astronomy, University of Texas at Austin) ;
  • Jeon, Young-Beom (Korea Astronomy and Space Science Institute)
  • Received : 2011.03.21
  • Accepted : 2011.04.01
  • Published : 2011.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

We report the results of our high resolution optical spectroscopic monitoring campaign (${\lambda}$ = 3800 ~ 8800 ${\AA}$, R = 30000 - 45000) of the new FU Orionis-type object HBC 722. We observed HBC 722 with the BOES 1.8-m telescope between November 26 and December 29, 2010, and FU Orionis itself on January 26, 2011. We detect a number of previously unreported high-resolution K I and Ca II lines beyond 7500 ${\AA}$. We resolve the H${\alpha}$ and Ca II line profiles into three velocity components, which we attribute to both disk and outflow. The increased accretion during outburst can heat the disk to produce the relatively narrow absorption feature and launch outflows appearing as high velocity blue and red-shifted broad features.

Keywords

References

  1. Andre, P., Motte, F., & Bacmann, A. 1999, Discovery of an Extremely Young Accreting Protostar in Taurus, ApJ, 513, L57 https://doi.org/10.1086/311908
  2. Bourke, T. L., Myers, P. C., Evans, N. J. II, Dunham, M. M., Kauffmann, J., et al. 2006, The Spitzer c2d Survey of Nearby Dense Cores. II. Discovery of a Low-Luminosity Object in the \Evolved Starless Core" L1521F, ApJ, 649, 37 https://doi.org/10.1086/506244
  3. Cohen, M. H., & Kuhi, L. V. 1979, Observational Studies of Pre-Main-Sequence Evolution, ApJS, 41, 743 https://doi.org/10.1086/190641
  4. Croswell, K., Hartmann, L., & Avrett, E. H. 1987, Mass Loss from FU Orionis Objects, ApJ, 312, 227 https://doi.org/10.1086/164865
  5. Dunham, M. M., Evans, N. J. II, Terebey, S., Dullemond, C. P., & Young, C. H. 2010, Evolutionary Signatures in the Formation of Low-Mass Protostars. II. Toward Reconciling Models and Observations, ApJ, 710, 470 https://doi.org/10.1088/0004-637X/710/1/470
  6. Green, J. D., Evans, N. J. II, Kospal, A., Kempen, T. A., Herczeg, G., et al. 2011, Disentangling the Environment of the FU Orionis Candidate HBC 722 with Herschel, ApJL, 731, 25 https://doi.org/10.1088/0004-637X/731/1/25
  7. Hanuschik, R. W. 2003, A Flux-Calibrated, High-Resolution Atlas of Optical Sky Emission from UVES, A&A, 407, 1157 https://doi.org/10.1051/0004-6361:20030885
  8. Hartmann, L., & Kenyon, S. J. 1996, The FU Orionis Phenomenon, ARA&A, 34, 1, 207 https://doi.org/10.1146/annurev.astro.34.1.207
  9. Kim, Kang-Min; Jang, Be-Ho; Han, Inwoo; Jang, Jeong Gyun, et al. 2002, Design and Manufacturing of the Cassegrain Interface Module of the BOAO Echelle Spectrograph, JKAS, 35, 221
  10. Kim, K.-M., Han, I., Valyavin, G. G., Plachinda, S., et al. 2007, The BOES Spectropolarimeter for Zeeman Measurements of Stellar Magnetic Fields, PASP, 119, 1052 https://doi.org/10.1086/521959
  11. Kurosawa, R., Harries, T. J., & Symington, N. H. 2006, On the Formation of $H\alpha$ Line Emission around Classical T Tauri Stars, MNRAS, 370, 580 https://doi.org/10.1111/j.1365-2966.2006.10527.x
  12. Laugalys, V., Straizys, V., Vrba, F. J., Boyle, R. P., Davis Philip., A. G., et al. 2006, CCD Photometry and Classification of Stars in the North America and Pelican Nebulae Region. III. The Dark Cloud L935, BaltA, 15, 483
  13. Lee, J.-E. 2007, Chemical Evolution in VeLLOs, JKAS, 40, 85
  14. Lee, J.-E., et al. 2010, The Spitzer c2d Survey of Nearby Dense Cores: Jet and Molecular Outflow Associated with a Young Stellar Object in Core A of L1251, ApJL, 709, 74 https://doi.org/10.1088/2041-8205/709/1/L74
  15. Miller, A. A., Hillenbrand, L. A., Covey, K. R., Poznanski, D., Silverman, J. M., et al. 2011, Evidence for an FU Orionis-like Outburst from a Classical T Tauri Star, ApJ, 730, 80 https://doi.org/10.1088/0004-637X/730/2/80
  16. Reipurth, B., & Aspin, C. 2010, FUors and Early Stellar Evolution, vaoa. conf., 19
  17. Semkov, E., Peneva, S. P., Munari, U., Milani, A., & Valisa, P. 2010 The Large Amplitude Outburst of the Young Star HBC 722 in NGC 7000/IC 5070, a New FU Orionis Candidate, A&A, 523L, 3
  18. Shu, F. H. 1977, Self-Similar Collapse of Isothermal Spheres and Star Formation, ApJ, 214, 488 https://doi.org/10.1086/155274
  19. Shu, F. H., Adams, F. C., & Lizano, S. 1987, Star Formation in Molecular Clouds - Observation and Theory, ARA&A, 25, 23 https://doi.org/10.1146/annurev.aa.25.090187.000323
  20. Terebey, S., Shu, F. H., & Cassen, P. 1984, The Collapse of the Cores of Slowly Rotating Isothermal Clouds, ApJ, 286, 529 https://doi.org/10.1086/162628
  21. Young, C. H., Jorgensen, J. K., Shirley, Y. L., Kauffmann, J., Huard, T., et al. 2004, A "Starless" Core that Isn't: Detection of a Source in the L1014 Dense Core with the Spitzer Space Telescope, ApJS, 154, 396 https://doi.org/10.1086/422818

Cited by

  1. V900 MON AND THOMMES’ NEBULA: A NEW FUor IN MONOCEROS vol.748, pp.1, 2012, https://doi.org/10.1088/2041-8205/748/1/L5
  2. COLOR VARIABILITY OF HBC 722 IN THE POST-OUTBURST PHASES vol.149, pp.2, 2015, https://doi.org/10.1088/0004-6256/149/2/73
  3. HIGH RESOLUTION OPTICAL AND NIR SPECTRA OF HBC 722 vol.807, pp.1, 2015, https://doi.org/10.1088/0004-637X/807/1/84