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A disk of dust and molecular gas around a high-mass protostar

Abstract

The processes leading to the birth of low-mass stars such as our Sun have been well studied1, but the formation of high-mass (over eight times the Sun's mass, M) stars remains poorly understood2. Recent studies suggest that high-mass stars may form through accretion of material from a circumstellar disk3, in essentially the same way as low-mass stars form, rather than through the merging of several low-mass stars4. There is as yet, however, no conclusive evidence5,6. Here we report the presence of a flattened disk-like structure around a massive 15M protostar in the Cepheus A region, based on observations of continuum emission from the dust and line emission from the molecular gas. The disk has a radius of about 330 astronomical units (au) and a mass of 1 to 8 M. It is oriented perpendicular to, and spatially coincident with, the central embedded powerful bipolar radio jet, just as is the case with low-mass stars, from which we conclude that high-mass stars can form through accretion.

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Figure 1: Emission from the Cepheus A HW2 protostar.
Figure 2: Position-velocity map of CH 3 CN emission along the major axis of the elongated structure shown in Fig. 1.

References

  1. Lada, C. J. & Shu, F. H. The formation of sunlike stars. Science 248, 564–572 (1990)

    ADS  CAS  Article  Google Scholar 

  2. Stahler, S. W., Palla, F. & Ho, P. T. P. in Protostars and Planets IV (eds Mannings, V., Boss, A. P. & Russell, S.) 327–351 (Univ. Arizona Press, Tucson, 2000)

    Google Scholar 

  3. McKee, C. & Tan, J. The formation of massive stars from turbulent cores. Astrophys. J. 585, 850–871 (2003)

    ADS  CAS  Article  Google Scholar 

  4. Bonnell, I. A. & Bate, M. R. Accretion in stellar clusters and the collisional formation of massive stars. Mon. Not. R. Astron. Soc. 336, 659–669 (2002)

    ADS  Article  Google Scholar 

  5. Chini, R. et al. The formation of a massive protostar through the disk accretion of gas. Nature 429, 155–157 (2004)

    ADS  CAS  Article  Google Scholar 

  6. Sako, S. et al. No high-mass protostars in the silhouette young stellar object M17-SO1. Nature 434, 995–998 (2004)

    ADS  Article  Google Scholar 

  7. Zhang, Q., Hunter, T. R. & Sridharan, T. K. A rotating disk around a high-mass young star. Astrophys. J. 505, L151–L154 (1998)

    ADS  Article  Google Scholar 

  8. Shepherd, D., Claussen, M. J. & Kurtz, S. E. Evidence for a solar system-size accretion disk Around the massive protostar G192.16-3.82. Science 292, 1513–1518 (2001)

    ADS  CAS  Article  Google Scholar 

  9. Cesaroni, R. et al. Unveiling the disk-jet system in the massive (proto)star IRAS 20126 + 4104. Astron. Astrophys 345, 949–964 (1999)

    ADS  CAS  Google Scholar 

  10. Sargent, A. I. Molecular clouds and star formation. I — Observations of the Cepheus OB3 molecular cloud. Astrophys. J. 218, 736–748 (1977)

    ADS  CAS  Article  Google Scholar 

  11. Blitz, L. & Lada, C. J. H2O masers near OB associations. Astrophys. J. 227, 152–158 (1979)

    ADS  CAS  Article  Google Scholar 

  12. Evans, N. J. et al. Far-infrared observations of the Cepheus OB3 molecular cloud. Astrophys. J. 244, 115–123 (1981)

    ADS  CAS  Article  Google Scholar 

  13. Hughes, V. A. & Wouterloot, J. G. A. The star-forming region in Cepheus A. Astrophys. J. 276, 204–210 (1984)

    ADS  CAS  Article  Google Scholar 

  14. Rodríguez, L. F. et al. Cepheus A HW2: A powerful thermal radio jet. Astrophys. J. 430, L65–L68 (1994)

    ADS  Article  Google Scholar 

  15. Hughes, V., Cohen, R. & Garrington, S. High-resolution observations of Cepheus A. Mon. Not. R. Astron. Soc. 272, 469–480 (1995)

    ADS  Article  Google Scholar 

  16. Torrelles, J. M. et al. The thermal radio jet of Cepheus A HW2 and the water maser distribution at 0.0.8″ scale (60 au). Astrophys. J. L107–L111 (1996)

  17. Gómez, J. F. et al. Disk and outflow in Cepheus A-HW2: Interferometric SiO and HCO+ observations. Astrophys. J. 514, 287–295 (1999)

    ADS  Article  Google Scholar 

  18. Rodríguez, L. F., Ho, P. T. P. & Moran, J. Anisotropic mass outflow in Cepheus A. Astrophys. J. 240, L149–L152 (1980)

    ADS  Article  Google Scholar 

  19. Curiel, S. et al. Large proper motions in the jet of the high-mass YSO Cepheus A HW2. Astrophys. J. (submitted)

  20. Rodríguez, L. F., Torrelles, J. M., Anglada, G. & Marti, J. VLA observations of brightness enhancements moving along the axis of the Cep A HW2 thermal jet. Rev. Mex. Astron. Astrofis. 37, 95–99 (2001)

    ADS  Google Scholar 

  21. Torrelles, J. M. et al. Systems with H2O maser and 1.3 centimeter continuum emission in Cepheus A. Astrophys. J. 509, 262–269 (1998)

    ADS  CAS  Article  Google Scholar 

  22. Furuya, R. S., Kitamura, Y., Wootten, A., Claussen, M. J. & Kawabe, R. Water maser survey toward low-mass young stellar objects in the northern sky with the Nobeyama 45 meter telescope and the very large array. Astrophys. J. Suppl. 144, 71–134 (2003)

    ADS  Article  Google Scholar 

  23. Ho, P. T. P., Moran, J. M. & Lo, K. Y. The Submillimeter Array. Astrophys. J. 616, L1–L6 (2004)

    ADS  Article  Google Scholar 

  24. Shu, F., Najita, J., Ostriker, E. & Shang, H. Magnetocentrifugally driven flows from young stars and disks. V. Asymptotic collimation into jets. Astrophys. J. 455, L155–L158 (1996)

    ADS  Google Scholar 

  25. Loren, R. B. & Mundy, L. G. The methyl cyanide hot and warm cores in Orion—Statistical equilibrium excitation models of a symmetric-top molecule. Astrophys. J. 286, 232–251 (1984)

    ADS  CAS  Article  Google Scholar 

  26. Hildebrand, R. The determination of cloud masses and dust characteristics from submillimetre thermal emission. Q. J. R. Astron. Soc. 24, 267–282 (1983)

    ADS  Google Scholar 

  27. Williams, S. J., Fuller, G. A. & Sridharan, T. K. The circumstellar environments of high-mass protostellar objects. I. Submillimetre continuum emission. Astron. Astrophys. 417, 115–133 (2004)

    ADS  CAS  Article  Google Scholar 

  28. Hunter, T. et al. 350 micron images of massive star formation regions. Astron. J. 119, 2711–2727 (2000)

    ADS  CAS  Article  Google Scholar 

  29. De Buizer, J., Osorio, M. & Calvet, N. Observations and modeling of the 2–25 µm emission from high mass protostellar object candidates. Astrophys. J. (in the press)

  30. Pankonin, V., Churchwell, E., Watson, C. & Bieging, J. H. A methyl cyanide search for the earliest stages of massive protostars. Astrophys. J. 558, 194–203 (2001)

    ADS  CAS  Article  Google Scholar 

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Acknowledgements

S.C. acknowledges support from DEGAPA/UNAM and CONACyT grants and from the Submillimeter Array project. G.A., J.F.G. and J.M.T. are supported by a grant (including FEDER funds) of the Ministerio de Educación y Ciencia, Spain. G.A. acknowledges support from Junta de Andalucía. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics, and is funded by the Smithsonian Institution and the Academic Sinica. We are grateful to the people of Hawi'ian ancestry on whose sacred mountain (Mauna Kea) we are privileged to be guests.

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Correspondence to Nimesh A. Patel.

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Patel, N., Curiel, S., Sridharan, T. et al. A disk of dust and molecular gas around a high-mass protostar. Nature 437, 109–111 (2005). https://doi.org/10.1038/nature04011

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