Hostname: page-component-54dcc4c588-rz4zl Total loading time: 0 Render date: 2025-10-06T12:04:49.354Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectroscopic monitoring of V Hydrae: a binary eclipsed by a jet?

Published online by Cambridge University Press:  06 October 2025

Léa Planquart Open the ORCID record for Léa Planquart [Opens in a new window]  and
Alain Jorissen
Léa Planquart*
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, 1050 Brussels, Belgium.
Alain Jorissen
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, 1050 Brussels, Belgium.
*
email: lea.planquart@ulb.be
Get access Rights & Permissions [Opens in a new window]

Abstract

The carbon-rich star V Hydrae is known to be in its transition from the asymptotic giant branch phase to a bipolar planetary nebula. However, the origin of its bipolar shape, as well as its long-term periodic obscuration, are not well understood. Using high-resolution spectra from the HERMES/Mercator spectrograph spanning over 10-yr monitoring, we disentangled the orbital signal from the intrinsic Mira-like variations of V Hya. The orbital solution obtained is compatible with the light-curve modulation, which we interpret as an obscuration caused by an extended dusty environment surrounding the unseen companion. Additionally, we report high-velocity phase-dependent absorption features in the sodium doublet and explain them by the presence of a conical jet ejected from the (accretion disc of the) companion. We confront our binary scenario with previous radio observations and discuss how this jet could shape the large-scale bipolar outflow of the system.

Keywords

stars: AGB and post-AGBstars: binariesAGB starISM: jets and outflows

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S384: Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics , December 2023 , pp. 366 - 369
Check for updates
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Barnbaum, C., Morris, M., & Kahane, C. 1995, ApJ, 450, 862 CrossRefGoogle Scholar
Bollen, D., Kamath, D., Van Winckel, H., & De Marco, O. 2019, A&A, 631, A53 Google Scholar
Brandt, T. D., Dupuy, T. J., Li, Y., et al. 2021, AJ, 162, 186 CrossRefGoogle Scholar
Campbell, L., 1926, Popular Astronomy, 34, 551 Google Scholar
De Marco, O., 2009, PASP, 121, 878 CrossRefGoogle Scholar
Knapp, G. R., Dobrovolsky, S. I., Ivezi, Z., et al. 1999, A&A, 351, 97 Google Scholar
Planquart, L., Jorissen, A., Escorza, A., et al. 2023, A&A, in pressGoogle Scholar
Planquart, L., Paladini, C., Jorissen, A., et al. 2024, A&A, submittedGoogle Scholar
Raskin, G., van Winckel, H., Hensberge, H., et al. 2011, A&A, 526, A69 Google Scholar
Sahai, R., Morris, M., Knapp, G. R., et al. 2003, Nature, 426, 6964 CrossRefGoogle Scholar
Sahai, R., Findeisen, K., Gil de Paz, A. et al. 2008, ApJ, 689, 2 CrossRefGoogle Scholar
Sahai, R., Huang, P. S., Scibelli, S., et al. 2022, ApJ, 929, 59 CrossRefGoogle Scholar