J/A+A/485/931 Young stars and brown dwarfs in Ori OB1b (Caballero+, 2008)
Young stars and brown dwarfs around Alnilam and Mintaka.
Caballero J.A., Solano E.
<Astron. Astrophys. 485, 931 (2008)>
=2008A&A...485..931C 2008A&A...485..931C
ADC_Keywords: Clusters, open ; Photometry, infrared
Keywords: astronomical data bases: miscellaneous -
stars: low mass, brown dwarfs -
open clusters and associations: individual: Ori OB1b, Collinder 70 -
stars: individual: Alnilam, Mintaka
Abstract:
We present here exhaustive lists of known young stars and new
candidate members around Alnilam and Mintaka in the Ori OB1b
association as well as of fore- and background sources. A total of 133
stars display features of extreme youth, including early spectral
types, lithium in absorption, or mid-infrared flux excess. Other two
young brown dwarf and 289 star candidates have been identified from an
optical/near-infrared colour-magnitude diagram. We list additional 74
known objects that might belong to the association. This compilation
of tables can serve as an input for characterisation of the stellar
and high-mass substellar populations in the Orion Belt.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 88 111 Photometry of correlated Tycho-2/2MASS sources in
the Alnilam field
tablea2.dat 88 113 Photometry of correlated Tycho-2/2MASS sources in
the Mintaka field
tablea3.dat 113 49 Known young stars in the Alnilam field and in
Tycho-2/2MASS
tablea4.dat 108 29 Known young stars in the Mintaka field and in
Tycho-2/2MASS
tablea5.dat 97 34 Stars of unknown association membership status in
the Alnilam field and in Tycho-2/2MASS
tablea6.dat 90 31 Stars of unknown association membership status in
the Mintaka field and in Tycho-2/2MASS
tablea7.dat 97 39 Fore- and background stars in the Alnilam field
and in Tycho-2/2MASS
tablea8.dat 91 63 Fore- and background stars in the Mintaka field
and in Tycho-2/2MASS
tablea9.dat 122 40 Known and new young stars in the Alnilam field
and in DENIS/2MASS
tablea10.dat 122 18 Known and new young stars in the Mintaka field
and in DENIS/2MASS
tablea11.dat 130 17 Stars of unknown status in the Alnilam and
Mintaka fields and in DENIS/2MASS
tablea12.dat 103 6 Fore- and background objects in the Alnilam and
Mintaka fields and in DENIS/2MASS
tablea13.dat 90 7 Probable reddened stars in DENIS/2MASS associated
to remnant molecular clouds in the Alnilam and
Mintaka fields
tablea14.dat 23 85 Galaxies in the Alnilam field and in 2MASS/2MASX
tablea15.dat 23 67 Galaxies in the Mintaka field and in 2MASS/2MASX
tablea16.dat 92 189 Young stars and brown dwarf candidates in the
Alnilam field and in DENIS/2MASS
tablea17.dat 92 102 Young stars and brown dwarf candidates in the
Mintaka field and in DENIS/2MASS
tablea18.dat 106 13 Remarkable fore- and background objects in the
comparison fields
refs.dat 251 102 References (tablea19 in the paper)
notes.tex 512 87 Notes
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea[12].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Object identifier
21- 24 I4 --- TYC1 Tycho-2 identification (field number)
26- 29 I4 --- TYC2 Tycho-2 identification (star number in field)
31 I1 --- TYC3 Tycho-2 identification (multiplicity)
32- 33 A2 --- n_TYC3 [+2 ] +2 for HD 37321 AB = 4767 271 1+2
35- 41 F7.4 mag BTmag Tycho-2 BT magnitude
43- 49 F7.4 mag VTmag Tycho-2 VT magnitude
51- 56 F6.3 mag Jmag 2MASS J magnitude
58- 62 F5.3 mag e_Jmag 2MASS J magnitude error
64- 69 F6.3 mag Hmag 2MASS H magnitude
71- 75 F5.3 mag e_Hmag 2MASS H magnitude error
77- 82 F6.3 mag Ksmag 2MASS Ks magnitude
84- 88 F5.3 mag e_Ksmag 2MASS Ks magnitude error
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea[34].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Object identifier
21 A1 --- f_Name [*] Flag to Notes
23- 38 A16 --- SpType MK Spectral type
40- 41 I2 h RAh Right ascension (J2000)
43- 44 I2 min RAm Right ascension (J2000)
46- 50 F5.2 s RAs Right ascension (J2000)
52 A1 --- DE- Declination sign (J2000)
53- 54 I2 deg DEd Declination (J2000)
56- 57 I2 arcmin DEm Declination (J2000)
59- 62 F4.1 arcsec DEs Declination (J2000)
65- 90 A26 --- Youth Features of youth indicator
92-113 A22 --- Ref References
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea[5678].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Object identifier
18 A1 --- f_Name [*] Flag to Notes
20- 26 A7 --- SpType MK Spectral type
28- 29 I2 h RAh Right ascension (J2000)
31- 32 I2 min RAm Right ascension (J2000)
34- 38 F5.2 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 50 F4.1 arcsec DEs Declination (J2000)
52- 57 F6.1 mas/yr pmRA ?=0. Proper motion in RA*cos(dec)
59- 61 F3.1 mas/yr e_pmRA ? rms uncertainty on pmRA
63- 68 F6.1 mas/yr pmDE ?=0. Proper motion in Dec
70- 72 F3.1 mas/yr e_pmDE ? rms uncertainty on pmDE
74- 79 A6 --- Remarks Comments
81- 97 A17 --- Ref References
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea9.dat tablea1[01].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Object identifier
21 A1 --- f_Name [*] Flag to Notes
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 33 F5.2 s RAs Right ascension (J2000)
35 A1 --- DE- Declination sign (J2000)
36- 37 I2 deg DEd Declination (J2000)
39- 40 I2 arcmin DEm Declination (J2000)
42- 45 F4.1 arcsec DEs Declination (J2000)
47- 52 F6.3 mag imag DENIS i magnitude
54- 57 F4.2 mag e_imag DENIS i magnitude error
59- 64 F6.3 mag Ksmag 2MASS Ks magnitude
66- 70 F5.3 mag e_Ksmag 2MASS Ks magnitude error
72-104 A33 --- Youth Features of youth indicator
106-122 A17 --- Ref References
124-130 A7 --- Field Stellar field
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea12.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Object identifier
21 A1 --- f_Name [*] Flag to Notes
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 33 F5.2 s RAs Right ascension (J2000)
35 A1 --- DE- Declination sign (J2000)
36- 37 I2 deg DEd Declination (J2000)
39- 40 I2 arcmin DEm Declination (J2000)
42- 45 F4.1 arcsec DEs Declination (J2000)
47- 52 F6.3 mag imag DENIS i magnitude
54- 57 F4.2 mag e_imag DENIS i magnitude error
59- 64 F6.3 mag Ksmag 2MASS Ks magnitude
66- 70 F5.3 mag e_Ksmag 2MASS Ks magnitude error
72- 81 A10 --- SpType MK Spectral type
83- 93 A11 --- Ref References
95-103 A9 --- Field Stellar field
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea13.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [2MASS]
7- 23 A17 --- 2MASS 2MASS identifier (JHHMMSSss-DDMMSSs)
25- 30 F6.3 mag imag DENIS i magnitude
32- 35 F4.2 mag e_imag DENIS i magnitude error
37- 42 F6.3 mag Jmag 2MASS J magnitude
44- 48 F5.3 mag e_Jmag 2MASS J magnitude error
50- 55 F6.3 mag Hmag 2MASS H magnitude
57- 61 F5.3 mag e_Hmag 2MASS H magnitude error
63- 68 F6.3 mag Ksmag 2MASS Ks magnitude
70- 74 F5.3 mag e_Ksmag 2MASS Ks magnitude error
76- 83 A8 --- Assoc Associated cloud name
84- 90 A7 --- Field Stellar field
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1[45].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [2MASX]
7- 23 A17 --- 2MASX 2MASX identifier (JHHMMSSss-DDMMSSs)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1[67].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- Name Object identifier
17 A1 --- f_Name [*] Flag to Notes
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 41 F4.1 arcsec DEs Declination (J2000)
43- 48 F6.3 mag imag DENIS i magnitude
50- 53 F4.2 mag e_imag DENIS i magnitude error
55- 60 F6.3 mag Jmag 2MASS J magnitude
62- 66 F5.3 mag e_Jmag 2MASS J magnitude error
68- 73 F6.3 mag Hmag 2MASS H magnitude
75- 79 F5.3 mag e_Hmag 2MASS H magnitude error
81- 86 F6.3 mag Ksmag 2MASS Ks magnitude
88- 92 F5.3 mag e_Ksmag 2MASS Ks magnitude error
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea18.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Object identifier
17 A1 --- f_Name [*] Flag to Notes
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 41 F4.1 arcsec DEs Declination (J2000)
43- 47 F5.2 mag VTmag Tycho-2 V magnitude
49- 53 F5.3 mag e_VTmag Tycho-2 V magnitude error
55- 60 F6.3 mag Ksmag 2MASS Ks magnitude
62- 66 F5.3 mag e_Ksmag 2MASS Ks magnitude error
69- 93 A25 --- Remarks Comments
95-106 A12 --- Ref References
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Ref Reference code
9- 27 A19 --- BibCode BibCode
29- 53 A25 --- Aut Author's name
55-251 A197 --- Com Comments
--------------------------------------------------------------------------------
Acknowledgements:
E. Solano, esm(at)laeff.inta.es
(End) Patricia Vannier [CDS] 27-Jun-2008