Hales, AS;
Barlow, MJ;
Crawford, IA;
Casassus, S;
(2016)
Atomic gas in debris discs.
Monthly Notices of the Royal Astronomical Society
, 466
(3)
pp. 3582-3593.
10.1093/mnras/stw3274.
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Abstract
We have conducted a search for optical circumstellar absorption lines in the spectra of 16 debris disc host stars. None of the stars in our sample showed signs of emission line activity in either Hα, Ca ii or Na i, confirming their more evolved nature. Four stars were found to exhibit narrow absorption features near the cores of the photospheric Ca ii and Na i D lines (when Na i D data were available). We analyse the characteristics of these spectral features to determine whether they are of circumstellar or interstellar origins. The strongest evidence for circumstellar gas is seen in the spectrum of HD 110058, which is known to host a debris disc observed close to edge-on. This is consistent with a recent ALMA detection of molecular gas in this debris disc, which shows many similarities to the β Pictoris system.
| Type: | Article |
|---|---|
| Title: | Atomic gas in debris discs |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stw3274 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stw3274 |
| Additional information: | © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society |
| Keywords: | techniques: spectroscopic, circumstellar matter |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1544184 |
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