J/A+A/623/A153 ALMA data cubes for HD 101584 (Olofsson+, 2019)
HD 101584: circumstellar characteristics and evolutionary status.
Olofsson H., Khouri T., Maercker M., Bergman P., Doan L., Tafoya D.,
Vlemmings W.H.T., Humphreys E.M.L., Lindqvist M., Nyman L., Ramstedt S.
<Astron. Astrophys. 623, A153 (2019)>
=2019A&A...623A.153O 2019A&A...623A.153O (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Radio continuum ; Radio lines
Keywords: circumstellar matter - stars: individual: HD 101584 -
stars: AGB and post-AGB - binaries: close - radio lines: stars
Abstract:
There is growing evidence that red giant evolution is often affected
by an interplay with a nearby companion, in some cases taking the form
of a common-envelope evolution.
We have performed a study of the characteristics of the circumstellar
environment of the binary object HD ,101584, that provides information
on a likely evolutionary scenario.
We have obtained and analyzed ALMA observations, complemented with
observations using APEX, of a large number of molecular lines. An
analysis of the spectral energy distribution has also been performed.
Emissions from 12 molecular species (not counting isotopologues) have
been observed, and most of them mapped with angular resolutions in the
range 0.1" to 0.6". Four circumstellar components are identified:
i) a central compact source of size ~=0.15", ii) an expanding
equatorial density enhancement (a flattened density distribution in
the plane of the orbit) of size ~=3", iii) a bipolar high-velocity
outflow (~=150km/s), and iv) an hourglass structure. The outflow is
directed almost along the line of sight. There is evidence of a second
bipolar outflow. The mass of the circumstellar gas is
~=0.5[D/1kpc]2M☉, about half of it lies in the equatorial
density enhancement. The dust mass is ~=0.01[D/1kpc]2M☉, and a
substantial fraction of this is in the form of large-sized, up to 1mm,
grains. The estimated kinetic age of the outflow is ~=770[D/1kpc]yr.
The kinetic energy and the scalar momentum of the accelerated gas are
estimated to be 7x1045[D/1kpc]2erg and 1039[D/1kpc]2g.cm/s,
respectively.
We provide good evidence that the binary system HD 101584 is in a
post-common-envelope-evolution phase, that ended before a stellar
merger. Isotope ratios combined with stellar mass estimates suggest
that the primary star's evolution was terminated already on the first
red giant branch (RGB). Most of the energy required to drive the
outflowing gas was probably released when material fell towards the
companion.
Description:
ALMA data cubes in fits-format.
Objects:
--------------------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------------------
11 40 58.81 -55 34 25.8 HD 101584 = V* V885 Cen
--------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 140 9 List of fits image and datacubes
fits/* . 9 Individual fits files
--------------------------------------------------------------------------------
See also:
J/A+A/307/869 : Nature of the peculiar supergiant HD 101584 (Bakker+, 1996)
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 32 I3 --- Nz ? Number of slices fro the datacubes
34- 59 A26 "datime" Obs.date Observation date
61- 67 F7.3 GHz bFREQ Lower value of frequency interval or
observed frequency for 230cont.fit
69- 75 F7.3 GHz BFREQ ? Upper value of frequency interval
77- 83 F7.5 MHz dFREQ ? Frequency resolution
85- 91 I7 Kibyte size Size of FITS file
93-104 A12 --- FileName Name of FITS file, in subdirectory fits
106-140 A35 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Hans Olofsson, hans.olofsson(at)chalmers.se
(End) Hans Olofsson [Chalmers, Sweden], Patricia Vannier [CDS] 25-Feb-2019