2015A&A...576L..15O


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.19CET16:35:45

2015A&A...576L..15O - Astronomy and Astrophysics, volume 576, L15-15 (2015/4-1)

ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD101584.

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

Abstract (from CDS):

We study the circumstellar evolution of the binary HD 101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. We used ALMA observations of the 12CO, 13CO, and C18O J=2-1 lines and the 1.3mm continuum to determine the morphology, kinematics, masses, and energetics of the circumstellar environment. The circumstellar medium has a bipolar hour-glass structure, seen almost pole-on, formed by an energetic jet, ≃150km/s. We conjecture that the circumstellar morphology is related to an event that took place ≃500yr ago, possibly a capture event where the companion spiraled in towards the AGB star. However, the kinetic energy of the accelerated gas exceeds the released orbital energy, and, taking into account the expected energy transfer efficiency of the process, the observed phenomenon does not match current common-envelope scenarios. This suggests that another process must augment, or even dominate, the ejection process. A significant amount of material resides in an unresolved region, presumably in the equatorial plane of the binary system.

Abstract Copyright:

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

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B1104-445 QSO 11 07 08.6939954176 -44 49 07.617187122   17.84 18.2 17.37   ~ 176 1
2 ICRF J113143.2-581853 QSO 11 31 43.2885173823 -58 18 53.444244302   19.06       ~ 19 0
3 HD 101584 pA* 11 40 58.8052292556 -55 34 25.813187841 7.80 7.40 7.01     B8/9I/IIe 120 0
4 HD 184738 PN 19 34 45.2337512278 +30 30 58.951476338   10.41 10.44     [WC9] 913 0

    Equat.    Gal    SGal    Ecl

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2020.01.19-16:35:45

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