J/A+A/635/A183 Fried Egg Nebula AMBER and GRAVITY observations (Koumpia+, 2020)
Optical/near-infrared observations of the Fried Egg Nebula.
Multiple shell ejections on a 100 yr timescale from a massive yellow hypergiant.
Koumpia E., Oudmaijer R.D., Graham V., Banyard G., Black J.H.,
Wichittanakom C., Ababakr K.M., de Wit W.-J., Millour F., Lagadec E.,
Muller S., Cox N.L.J., Zijlstra A., van Winckel H., Hillen M., Szczerba R.,
Vink J.S., Wallstrom S.H.J.
<Astron. Astrophys. 635, A183 (2020)>
=2020A&A...635A.183K 2020A&A...635A.183K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, giant ; Interferometry ; Spectroscopy
Keywords: techniques: interferometric - stars: AGB and post-AGB -
stars: evolution - stars: imaging - stars: mass-loss
stars: individual: IRAS 17163-3907
Abstract:
The objective of this work is to study in detail the nature (i.e.,
geometry, rates) of the mass-loss episodes associated with the yellow
hypergiant IRAS 17163-3907. We analysed a large set of
optical/near-infrared data, in spectroscopic, photometric,
spectropolarimetric, and interferometric modes. We use the optical
observations to determine its spectral type and we present the first
model independent reconstructed images of IRAS 17163-3907 at 2 micron
tracing milli-arcsecond scales. Lastly, we apply a 2D radiative
transfer model to fit the dereddened photometry and the radial profiles
of published diffraction limited VISIR images at 8.59um, 11.85um and
12.81um simultaneously, adopting a revised distance determination
using the new Gaia measurements (DR2).
Description:
These are the reduced and calibrated GRAVITY and AMBER data, after
applying GRAVITY and AMBER standard pipeline recipes (as provided by
ESO, versions 1.0.5 and 3.0.9 respectively). These files include the
flux and interferometric observables at the corresponding wavelength
ranges.
IRAS 17163-3907 was observed for a total of nine hours during ten
nights between April and August 2017 with GRAVITY, using the four 1.8
m Auxiliary Telescopes of the VLTI.
The interferometric AMBER observations were performed in
visitor mode on the night of 2012 June 22. AMBER is a decommissioned
instrument of the VLTI that used to operate in the NIR H and K bands
as spectro-interferometer, combining beams from three telescopes.
Objects:
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RA (2000) DE Designation(s)
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17 19 49.33 -39 10 37.9 IRAS 17163-3907 = NAME Fried Egg Nebula
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 171 39 List of fits files
fits/* . 39 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension (J2000)
4- 5 I2 min RAm Right Ascension (J2000)
7- 11 F5.2 s RAs Right Ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 49 A26 "datime" Obs.date Observation date
51- 53 I3 Kibyte size Size of FITS file
55-124 A70 --- FileName Name of FITS file, in subdirectory fits
126-171 A46 --- Title Title of the FITS file
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Acknowledgements:
Evgenia Koumpia, ev.koumpia(at)gmail.com
(End) Patricia Vannier [CDS] 02-Mar-2020