Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.


The super-resolved megamasers of NGC 4258

The precise location of megamaser emission regions in galactic accretion disks has been challenging to pinpoint. Now with interferometric observations leveraging baselines larger than the Earth’s diameter, the missing information is getting closer and closer.

This is a preview of subscription content, access via your institution

Access options

Rent or buy this article

Get just this article for as long as you need it


Prices may be subject to local taxes which are calculated during checkout

Fig. 1: The megamasers in the disk of NGC 4258 seen on VLBI scales.


  1. Baan, W. et al. Nat. Astron. (2022).

    Article  Google Scholar 

  2. Lo, K. Y. Annu. Rev. Astron. Astrophys. 43, 625–676 (2005).

    Article  ADS  Google Scholar 

  3. Braatz, J. A. et al. Astrophys. J. 718, 657–665 (2010).

    Article  ADS  Google Scholar 

  4. Impellizzeri, C. M. V. et al. Nature 456, 927–929 (2008).

    Article  ADS  Google Scholar 

  5. Kuo, C. Y. et al. Astrophys. J. 727, 20 (2011).

    Article  ADS  Google Scholar 

  6. Kormendy, J. & Ho, L. C. Annu. Rev. Astron. Astrophys. 51, 511–653 (2013).

    Article  ADS  Google Scholar 

  7. Greene, J. E. et al. Astrophys. J. 826, 32 (2016).

    Article  Google Scholar 

  8. Pesce, D. W. et al. Astrophys. J. Lett. 891, 1 (2020).

    Article  ADS  Google Scholar 

  9. Miyoshi, M. et al. Nature 373, 127–129 (1995).

    Article  ADS  Google Scholar 

  10. Riess, A. G. et al. Astrophys. J. 876, 85 (2019).

    Article  ADS  Google Scholar 

  11. Neufeld, D. A., Maloney, P. R. & Conger, S. Astrophys. J. 436, L127–L130 (1994).

    Article  ADS  Google Scholar 

  12. Humphreys, E. M. L. et al. Astron. Astrophys. 592, L13 (2016).

    Article  ADS  Google Scholar 

  13. Hagiwara, Y. et al. Astrophys. J. 923, 251 (2021).

    Article  ADS  Google Scholar 

  14. Herrnstein, J. R. et al. Nature 400, 539–541 (1999).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to C. M. Violette Impellizzeri.

Ethics declarations

Competing interests

The author declares no competing interests.

Rights and permissions

Reprints and Permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Impellizzeri, C.M.V. The super-resolved megamasers of NGC 4258. Nat Astron 6, 885–886 (2022).

Download citation

  • Published:

  • Issue Date:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing