Bibcode
Santander-García, M.; Rodríguez-Gil, P.; Hernandez, O.; Corradi, R. L. M.; Jones, D.; Giammanco, C.; Beckman, J. E.; Carignan, C.; Fathi, K.; Rubio-Díez, M. M.; Jiménez-Luján, F.; Benn, C. R.
Bibliographical reference
Astronomy and Astrophysics, Volume 519, id.A54
Advertised on:
9
2010
Journal
Citations
6
Refereed citations
6
Description
Context. The link between how bipolar planetary nebulae are shaped and
their central stars is still poorly understood. Aims: This paper
investigates the kinematics and shaping of the multipolar nebula M 1-75,
and briefly discusses the location and nature of its central star. Methods: Fabry-Perot data from GHαFAS on the WHT that samples
the Doppler shift of the [Nii] 658.3 nm line are used to study the
dynamics of the nebula by means of a detailed 3D spatio-kinematical
model. Multi-wavelength images and spectra from the WFC and IDS on the
INT, as well as from ACAM on the WHT, allowed us to constrain the
parameters of the central star. Results: The two pairs of lobes,
angularly separated by ~22°, were ejected simultaneously approx.
~3500-5000 years ago, at the adopted distance range from 3.5 to 5.0 kpc.
The larger lobes show a slight degree of point symmetry. The formation
of the nebula could be explained by wind interaction in a system
consisting of a post-AGB star surrounded by a disc warped by radiative
instabilities. This requires the system to be a close binary or a single
star that engulfed a planet as it died. On the other hand, we present
broad- and narrow-band images and a low S/N optical spectrum of the
highly-reddened, previously unnoticed star that is likely the nebular
progenitor. Its estimated V-I colour allows us to derive a rough
estimate of the parameters and nature of the central star.
Based on observations made with the 4.2 m William Herschel Telescope and
the 2.5 m Isaac Newton Telescope, both operated on the island of la
Palma by the Isaac Newton Group of Telescopes in the Spanish
Observatorio del Roque de los Muchachos of the Instituto de
Astrofísica de Canarias.
Related projects
Kinematic, Structural and Composition Studies of the Interstellar and Intergalactic Media
The basic objective of the broject is to investigate the evolution of galaxies by deepening our understanding of the interaction between the insterstellar medium and the stars.The main technique which we use is the two-dimensional kinematic study of whole galaxies observed using our instrument:GHaFaS, a Fabry-Perot interferometer on the William
Prof.
John E. Beckman
Bipolar Nebulae
This project has three major objectives: 1) To determine the physico-chemical characteristics of bipolar planetary nebulae and symbiotic nebulae, to help understanding the origin of bipolarity and to test theoretical models, mainly models with binary central stars, aimed at explaining the observed morphology and kinematics. 2) To study the low
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The study of binary stars is essential to stellar astrophysics. A large number of stars form and evolve within binary systems. Therefore, their study is fundamental to understand stellar and galactic evolution. Particularly relevant is that binary systems are still the best source of precise stellar mass and radius measurements. Research lines
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