J/A+A/561/A8 Binary central stars of SMC PNe (Hajduk+, 2014)
Search for binary central stars of the SMC PNe.
Hajduk M., Gladkowski M., Soszynski I.
<Astron. Astrophys. 561, A8 (2014)>
=2014A&A...561A...8H 2014A&A...561A...8H
ADC_Keywords: Magellanic Clouds ; Planetary nebulae ; Stars, Be ;
Stars, emission ; X-ray sources ; YSOs ; Spectroscopy
Keywords: planetary nebulae: general - binaries: general - binaries: symbiotic -
Magellanic Clouds - binaries: eclipsing
Abstract:
The Optical Gravitational Lensing Experiment (OGLE), originally
designed to search for microlensing events, provides a rich and
uniform data set suitable for studying the variability of certain
types of objects. We used the OGLE data to study the photometry of
central stars of planetary nebulae (PNe) in the Small Magellanic Cloud
(SMC). In particular, we searched for close binary central stars with
the aim to constrain the binary fraction and period distribution in
the SMC. We also searched for PNe mimics and removed them from the PNe
sample. We identified 52 counterparts of PNe in the SMC in the I-band
images from the OGLE-II and OGLE-III surveys. We analysed the
time-series photometry of the PNe. Spectra of the photometric
variables were obtained to constrain the nature of the objects or
search for additional evidence for binarity. Eight variables were
found. Of these, seven objects are PNe mimics, including one symbiotic
star candidate. One close binary central star of PN with a period of
1.15 or 2.31 day was discovered. The obtained binary fraction for the
SMC PNe and the observational biases are discussed in terms of the
OGLE observations.
Description:
Spectroscopic observations of objects showing photometric variability.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 107 45 List of PNe identified in the OGLE-II and
OGLE-III fields in the SMC
objects.dat 65 8 Information on each object (table 2)
table4.dat 43 21097 Spectra of 8 objects showing photometric
variability: flux data
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See also:
J/A+AS/102/451 : Emission-line stars and PNe in the SMC (Meyssonnier+ 1993)
J/ApJS/75/407 : LMC + SMC PNe optical spectroscopy. I (Meatheringham+ 1991)
J/ApJS/76/1085 : LMC + SMC PNe optical spectroscopy. II (Meatheringham+ 1991)
J/ApJS/83/87 : LMC + SMC PNe optical spectroscopy. III (Vassiliadis+ 1992)
J/AcA/51/317 : OGLE DIA. Catalog of LMC and SMC images (Zebrun+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Name
15 I1 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 24 F5.2 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 36 F4.1 arcsec DEs Declination (J2000)
38- 43 F6.3 mag Vmag ? V magnitude
45- 50 F6.3 mag Imag ? I magnitude
52- 59 A8 --- NI Number of the OGLE-II (when available) and
OGLE-III observations
61 I1 --- r_NI Reference for NI (1)
63- 66 F4.2 arcsec Dim1 ? Diameter or major axis
67 A1 --- --- [x]
68- 71 F4.2 arcsec Dim2 ? Minor axis
73- 74 I2 --- r_Dim1 ? Reference for dimensions (1)
76-107 A32 --- OName Other names
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Note (1): Reference as follows:
1 = Henize (1956ApJS....2..315H 1956ApJS....2..315H)
2 = Sanduleak et al. (1978PASP...90..621S 1978PASP...90..621S)
3 = Jacoby (1980ApJS...42....1J 1980ApJS...42....1J)
4 = Sanduleak & Pesch (1981PASP...93..431S 1981PASP...93..431S)
5 = Lindsay (1961AJ.....66..169L 1961AJ.....66..169L)
6 = Meyssonnier & Azzopardi (1993A&AS..102..451M 1993A&AS..102..451M)
7 = Morgan & Good (1985MNRAS.213..491M 1985MNRAS.213..491M)
8 = Morgan (1995A&AS..112..445M 1995A&AS..112..445M)
9 = Jacoby & De Marco (2002AJ....123..269J 2002AJ....123..269J)
10 = Stanghellini et al. (2003ApJ...596..997S 2003ApJ...596..997S)
11 = Shaw et al. (2006ApJS..167..201S 2006ApJS..167..201S)
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Byte-by-byte Description of file: objects.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Name of the object (1)
15- 16 I2 h RAh Right Ascension J2000 (hours)
17- 18 I2 min RAm Right Ascension J2000 (minutes)
19- 23 F5.2 s RAs Right Ascension J2000 (seconds)
25 A1 --- DE- Declination J2000 (sign)
26- 27 I2 deg DEd Declination J2000 (degrees)
28- 29 I2 arcmin DEm Declination J2000 (minutes)
30- 33 F4.1 arcsec DEs Declination J2000 (seconds)
35- 40 F6.3 mag Imag I band OGLE-III mean magnitude
42- 47 F6.3 mag Vmag V band OGLE-III mean magnitude
49- 65 A17 --- ONames Other names (1)
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Note (1): Acronyms used:
[MA93] = Meyssonnier and Azzopardi (1993A&AS..102..451M 1993A&AS..102..451M)
[JD2002] = Jacoby and De Marco (2002AJ....123..269J 2002AJ....123..269J)
LIN = Lindsay (1961AJ.....66..169L 1961AJ.....66..169L)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Name of the object
15- 29 F15.11 nm lambda [349/750] Spectral wavelength
31- 43 E13.11 cW/m2/nm F(lambda) Flux values (erg/cm2/Å)
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Acknowledgements:
Marcin Hajduk, Marcin.Hajduk(at)astri.uni.torun.pl
(End) Patricia Vannier [CDS] 06-Nov-2013