2018
DOI: 10.1051/0004-6361/201732470
|View full text |Cite
|
Sign up to set email alerts
|

Circumstellar environment of the M-type AGB star R Doradus

Abstract: Context. Our current insights into the circumstellar chemistry of asymptotic giant branch (AGB) stars are largely based on studies of carbon-rich stars and stars with high mass-loss rates. Aims. In order to expand the current molecular inventory of evolved stars we present a spectral scan of the nearby, oxygen-rich star R Dor, a star with a low mass-loss rate (∼ 2 × 10 −7 M ⊙ yr −1 ). Methods. We carried out a spectral scan in the frequency ranges 159.0 − 321.5 GHz and 338.5 − 368.5 GHz (wavelength range 0.8 −… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

4
29
0

Year Published

2018
2018
2023
2023

Publication Types

Select...
9

Relationship

2
7

Authors

Journals

citations
Cited by 37 publications
(36 citation statements)
references
References 63 publications
4
29
0
Order By: Relevance
“…Projected distances between ∼20 and ∼100 au host a slow radial wind with Doppler velocities reaching up to ∼6 km s −1 ; it is characterized by strong inhomogeneity, both in direction and radially, as had been noted earlier by De Beck & Olofsson (2018). The former takes the form of separate cores, together covering very large solid angles, and the latter suggests the occurrence of an episode of enhanced mass loss at the scale of a century ago.…”
Section: Discussionsupporting
confidence: 54%
See 1 more Smart Citation
“…Projected distances between ∼20 and ∼100 au host a slow radial wind with Doppler velocities reaching up to ∼6 km s −1 ; it is characterized by strong inhomogeneity, both in direction and radially, as had been noted earlier by De Beck & Olofsson (2018). The former takes the form of separate cores, together covering very large solid angles, and the latter suggests the occurrence of an episode of enhanced mass loss at the scale of a century ago.…”
Section: Discussionsupporting
confidence: 54%
“…In the present paper, we study instead the slower wind, exclusive of higher Doppler velocities. Earlier studies by Khouri et al (2016), Danilovich et al (2016), De Beck & Olofsson (2018), Van de Sande et al (2018), Decin et al (2018), Homan et al (2018) and Vlemmings et al (2018) have contributed a considerable amount of detailed information of relevance to the physicochemistry and dynamics of both dust and gas in this slower wind, however without attempting a detailed description of the morpho-kinematics, which is the aim of the present paper.…”
Section: Introductionmentioning
confidence: 93%
“…To date, most studies on circumstellar chemistry have focused on AGB stars, even though still, at present, full spectral surveys, covering instantaneously a wide range of frequencies and multiple transitions for many species, have been performed only for a few objects. Some examples are the C-rich AGB star IRC+10216 [41,42], probably the best studied AGB star, and the O-rich AGB stars IK Tau and R Dor [43,44]. The chemistries of a number of pPNe are also relatively well characterized, particularly the C-rich pPNe CRL 618 [45] and CRL 2688 [46] and the O-rich source OH 231.8+4.2 [47,48].…”
Section: Circumstellar Chemistrymentioning
confidence: 99%
“…The circumstellar envelope of R Dor has been probed by ALMA with a resolution of ∼4 au up to some 60 au from the star [7,10,11] and the dust has been observed at the VLT with a resolution of 1.2 au [23]. In addition, below ∼15 au, the analyses of Danilovich et al [24], De Beck & Olofsson [25] and Van de Sande et al [26] have contributed a considerable amount of detailed information of relevance to the physico-chemistry and dynamics of both dust and gas. At larger distances from the star, an analysis of ALMA observations of SO(J K = 6 5 − 5 4 ) emission [27], probing distances between 20 and 100 au, gives evidence for the wind to host a radial outflow covering large solid angles and displaying strong inhomogeneity both in direction and radially: the former takes the form of multiple cores and the latter displays a radial dependence suggesting an episode of enhanced mass loss having occurred a century or so ago.…”
Section: Introductionmentioning
confidence: 99%