2017A&A...603L...2O


Query : 2017A&A...603L...2O

2017A&A...603L...2O - Astronomy and Astrophysics, volume 603, L2-2 (2017/7-1)

First detection of methanol towards a post-AGB object, HD 101584.

OLOFSSON H., VLEMMINGS W.H.T., BERGMAN P., HUMPHREYS E.M.L., LINDQVIST M., MAERCKER M., NYMAN L., RAMSTEDT S. and TAFOYA D.

Abstract (from CDS):

The circumstellar environments of objects on the asymptotic giant branch and beyond are rich in molecular species. Nevertheless, methanol has never been detected in such an object, and is therefore often taken as a clear signpost for a young stellar object. However, we report the first detection of CH3OH in a post-AGB object, HD 101584, using ALMA. Its emission, together with emissions from CO, SiO, SO, CS, and H2CO, comes from two extreme velocity spots on either side of the object where a high-velocity outflow appears to interact with the surrounding medium. We have derived molecular abundances, and propose that the detected molecular species are the effect of a post-shock chemistry where circumstellar grains play a role. We further provide evidence that HD 101584 was a low-mass, M-type AGB star.

Abstract Copyright: © ESO, 2017

Journal keyword(s): circumstellar matter - stars: individual: HD 101584 - stars: AGB and post-AGB - radio lines: stars - radio lines: stars

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* IK Tau Mi* 03 53 28.8884898148 +11 24 21.865959095 16.99 17.03 13.39 7.29 3.20 M7-11 592 0
2 OH 231.8 +4.2 OH* 07 42 16.947 -14 42 50.20           M10III+A 513 1
3 QSO B1104-445 QSO 11 07 08.6939954176 -44 49 07.617187122   17.84 18.2 17.37   ~ 207 1
4 ICRF J113143.2-581853 QSO 11 31 43.2885173823 -58 18 53.444244302   19.06       ~ 21 0
5 PMN J1132-5606 Rad 11 32 16.4153 -56 06 44.731           ~ 11 1
6 HD 101584 pA* 11 40 58.8052292556 -55 34 25.813187841 7.80 7.40 7.01     B8/9I/IIe 130 0
7 IRC +10420 pA* 19 26 48.0981288433 +11 21 16.756524951   13.98 11.66     F8Ia+e 459 0
8 IRAS 19312+1950 Y*O 19 33 24.24888 +19 56 55.6512           ~ 48 0
9 [DE95] LDN 1157 B1 out 20 39 11 +68 01.3           ~ 211 0

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2021.11.27-18:04:59

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