3C 273 host galaxy with Hubble Space Telescope coronagraphy - Observatoire de la Cote d'Azur Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2024

3C 273 host galaxy with Hubble Space Telescope coronagraphy

Kevin Fogarty
  • Function : Correspondent author
John H. Debes
  • Function : Author
Eileen T. Meyer
  • Function : Author
Youbin Mo
  • Function : Author
Dimitri Mawet
  • Function : Author
Marshall D. Perrin
  • Function : Author
Patrick M. Ogle
  • Function : Author
Johannes Sahlmann
  • Function : Author


The close-in regions of bright quasars’ host galaxies have been difficult to image due to the overwhelming light coming from quasars. With coronagraphic observations in visible light using the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope, we removed 3C 273 quasar light using color-matching reference stars. The observations revealed the host galaxy from 60″ to 0.​​″2 with nearly full angular coverage. Isophote modeling has revealed a new core jet, a core blob, and multiple smaller-scale blobs within 2.​​″5. The blobs could potentially be satellite galaxies or infalling materials towards the central quasar. Using archival STIS data, we constrained the apparent motion of its large scale jets over a 22 yr timeline. By resolving the 3C 273 host galaxy with STIS, our study validates the use of coronagraphs on extragalactic sources for obtaining new insights into the central (at ∼kpc scales) regions of quasar hosts.
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Dates and versions

hal-04486485 , version 1 (01-03-2024)



Bin B. Ren, Kevin Fogarty, John H. Debes, Eileen T. Meyer, Youbin Mo, et al.. 3C 273 host galaxy with Hubble Space Telescope coronagraphy. Astronomy and Astrophysics - A&A, 2024, 683, pp.L5. ⟨10.1051/0004-6361/202348254⟩. ⟨hal-04486485⟩


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