J/A+A/343/841 Imaging of symbiotic stars (Corradi+ 1999)
A narrowband imaging survey of symbiotic stars
Corradi R.L.M., Brandi E., Ferrer O.E., Schwarz H.E.
<Astron. Astrophys. 343, 841 (1999)>
=1999A&A...343..841C 1999A&A...343..841C (SIMBAD/NED BibCode)
ADC_Keywords: Spectrophotometry ; Stars, variable
Keywords: surveys - binaries: symbiotic - ISM : jets and outflows
Abstract:
Narrowband images of 51 symbiotic stars were obtained at the ESO and
ORM observatories to search for resolved optical nebulae. Ionized
nebulae much larger than previously known are found around CH Cyg, HM
Sge and V1016 Cyg, and they will be discussed in detail in forthcoming
papers. A nebula with a deconvolved size between 0.9" and 1.5" is
found around the symbiotic Mira H 1-36. The radio sources located few
arcminutes aside of R Aqr (Hollis et al., 1987ApJ...321L..55H 1987ApJ...321L..55H), which
were suggested to be the remnant of a prehistoric eruption of the
system, are found to be background galaxies. We also present a
bibliographical compilation, updated to October 1998, of all the
extended nebulae around symbiotic stars detected at optical and radio
wavelengths, as well as a list of optical non-detections. The
statistics of occurrence of these large ionized nebulae among
symbiotic stars is discussed. Extended ionized nebulae appear to be a
common component of the D-type symbiotics, and we infer that they are
formed by the Mira wind and/or high velocity winds ejected by the hot
component during outbursts. On the contrary, very few nebulae are
detected around the systems containing normal red giants.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 101 117 Optical non-detections
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See also:
III/174 : Atlas of line profiles of symbiotic stars (VanWinckel+, 1994)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name1 First name of the object
11- 22 A12 --- Name2 Second name (only when existing)
24- 32 A9 --- IRType Symbiotic IR type
34- 39 A6 --- Tel Telescope (1)
41- 48 A8 --- Filter Filter (2)
50- 66 A17 s ExpTime Exposure time (3)
68- 70 A3 arcsec See Seeing
72- 85 A14 --- Notes Notes (4)
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Note (1): 2.6NOT: 2.6m Nordic Optical Telescope of the ORM
1.5DAN: 1.54m Danish telescope of ESO
3.5NTT: 3.5m NTT of ESO
0.9DUT: 0.9m Dutch telescope of ESO
1SAAO : 1m telescope at the South African Astronomical Observatory
Note (2): Ha+[NII]: relatively broad filter (FWHM≥5nm) including both
Hα and [NII] emission
Ha or [NII]: narrow filter isolating one of the two lines, with no
or little contamination from the other
(FWHM=2.5nm at the 1.5DAN, 1nm at the 2.6NOT)
[OIII]: [OIII]500.7nm
[OII]: [OII]372.8nm
Ha cont.: off-band filter (continuum)
Note (3): (C) = coronographic spot
Note (4): saturated: indicated only when all exposures in a specific filter
produced saturated images of the central source.
1: Munari & Patat, 1993A&A...277..195M 1993A&A...277..195M
2: Kohoutek, 1997A&AS..125..445K 1997A&AS..125..445K
3: Extended nebula detected by Paresce (1990ApJ...357..231P 1990ApJ...357..231P), using
a coronograph and after substraction of a stellar profile
4: A sub-arcsec nebula was detected by HST
(Schild & Schmid, 1997A&A...324..606S 1997A&A...324..606S)
5: An Hα nebula with a size of 8 arcsec was detected
by Fuensalida et al. (1988A&A...191L..13F 1988A&A...191L..13F)
6: No field stars available for comparison
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Acknowledgements: Romano Corradi
(End) Patricia Bauer [CDS] 05-Jan-1999