J/A+A/458/461 Binary stars in the Orion Nebula Cluster (Koehler+, 2006)
Binary stars in the Orion Nebula Cluster.
Koehler R., Petr-Gotzens M.G., McCaughrean M.J., Bouvier J., Duchene G.,
Quirrenbach A., Zinnecker H.
<Astron. Astrophys., 458, 461-476 (2006)>
=2006A&A...458..461K 2006A&A...458..461K
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ;
Infrared sources
Keywords: stars: pre-main-sequence - binaries: visual - infrared: stars -
surveys - techniques: high angular resolution
Abstract:
We report on a high-spatial-resolution survey for binary stars in the
periphery of the Orion Nebula Cluster, at 5-15arcmin (0.65-2pc) from
the cluster center. We observed 228 stars with adaptive optics
systems, in order to find companions at separations of
0.13"-1.12" (60-500AU), and detected 13 new binaries. Combined with the
results of Petr (1998, Ph.D. Thesis, University of Heidelberg), we
have a sample of 275 objects, about half of which have masses from the
literature and high probabilities to be cluster members.
Description:
The major part of the observations was carried out during three nights
in December 2001 at the ESO 3.6m telescope on La Silla. In February
2002, eleven fields were observed in one half night at the Keck II
telescope.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 61 52 Fields observed for this work
table2.dat 80 13 New ONC Binaries found in this work
table6.dat 64 228 Complete target list
--------------------------------------------------------------------------------
See also:
J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)
J/ApJ/582/382 : Chandra X-ray sources in ONC (Flaccomio+, 2003)
J/AJ/129/1534 : Mid-IR photometry in the Orion Nebula (Robberto+, 2005)
J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GuideStar Name of the central star that was used to
guide the adaptive optics system (G1)
9 I1 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 19 F6.3 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22 I1 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 31 F5.2 arcsec DEs Declination (J2000)
33- 36 F4.1 arcmin r Distance to θ1C Ori (G2)
38- 39 I2 --- NTarget Number of stars actually observed in this
field
41- 50 A10 "DD.MM.YYYY" ObsDate Observation date
52- 61 A10 "DD.MM.YYYY" ObsDate2 Observation date
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Name (G1)
13 I1 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 23 F6.3 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26 I1 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 35 F5.2 arcsec DEs Declination (J2000)
37- 41 F5.2 arcmin r Distance to θ1C Ori (G2)
43- 46 F4.2 arcsec Sep Separation
48- 51 F4.2 arcsec e_Sep rms uncertainty on Sep
53- 56 F4.2 mag DKmag K magnitude difference
58- 61 F4.2 mag e_DKmag rms uncertainty on DKmag
63- 66 I4 --- [H97b] ? Hillenbrand (1997, Cat. J/AJ/113/1733)
number
68- 72 F5.2 solMass H97mass ? Mass from Hillenbrand,
1997, Cat. J/AJ/113/1733
74 A1 --- l_IRmass Limit flag on IRmass
75- 77 F3.1 solMass IRmass ? Mass from IR photometry
79- 80 I2 % Memb ? Membership probability
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [KPM2006] Sequential number
5- 25 A21 --- Name Other name
28 I1 h RAh Right ascension (J2000)
30- 31 I2 min RAm Right ascension (J2000)
33- 36 F4.1 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39 I1 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 45 I2 arcsec DEs Declination (J2000)
47- 51 F5.2 solMass H97mass ? Mass from Hillenbrand,
1997, Cat. J/AJ/113/1733
53 A1 --- l_IRmass Limit flag on IRmass
54- 56 F3.1 solMass IRmass ? Mass from IR photometry
58- 64 A7 --- GuideStar Guide star name
--------------------------------------------------------------------------------
Global notes:
Note (G1): JWNNNN from Jones & Walker (1988AJ.....95.1755J 1988AJ.....95.1755J, JW NNNN),
ParNNNN from Parenago (1954, Cat. II/171, Parenago NNNN) and
AD95 NNNN from Ali & Depoy (1995AJ....109..709A 1995AJ....109..709A, [AD95] NNNN)
Note (G2): Offset from θ1C Ori at 05:35:16:464-05:23:23.18 (J2000)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 04-May-2007