J/A+A/556/A144 Proper motions of young stars in Chamaeleon (Lopez Marti+, 2013)
Proper motions of young stars in Chamaeleon.
II. New kinematical candidate members of Chamaeleon I and II.
Lopez Marti B., Jimenez-Esteban F., Bayo A., Barrado D., Solano E.,
Bouy, H., Rodrigo C.
<Astron. Astrophys. 556, A144 (2013)>
=2013A&A...556A.144L 2013A&A...556A.144L
ADC_Keywords: Stars, late-type ; Proper motions ; Photometry ;
Effective temperatures ; Stars, masses ; Stars, ages
Keywords: stars: low-mass - stars: pre-main sequence - stars: formation -
stars: luminosity function, mass function -
astronomical databases: miscellaneous - virtual observatory tools
Abstract:
We present the results of a search for new candidate members of the
Chamaeleon I and II star forming regions based on proper motions and
multiwavelength photometry. Kinematic candidate members are initially
selected in an area of 3 degrees around each cloud on the basis of
proper motions and colours using the UCAC4 catalogue. The SEDs of the
objects are constructed using photometry retrieved from the Virtual
Observatory and other resources, and fitted to models of stellar
photospheres in order to derive effective temperatures, gravity values
and luminosities. Masses and ages are estimated by comparison with
theoretical evolutionary tracks in a Hertzprung-Russell diagram.
Objects with ages ≤20Myr are selected as probable members of the
moving groups. The properties of our candidates are compared with
those of the previously known members of the clouds.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 167 65 Kinematical candidate members of ChaI and II
table3.dat 134 21 SIMBAD information for the new candidates
table4.dat 82 918 Compiled photometry for the ChaI and II candidates
table6.dat 110 65 Best-fitting results and derived masses and ages
table8.dat 119 55 Physical parameters of ChaI and II members
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See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
III/265 : RAVE 3rd data release (Siebert+, 2011)
http://www.aavso.org/apass : APASS: the AAVSO Photometric All-Sky Survey
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object name (ChaI-PM-NN or ChaII-PM-NN)
15- 24 A10 --- UCAC4 UCAC4 identificator (FFF-NNNNNN)
28- 29 I2 h RAh Right Ascension J2000 (hours)
31- 32 I2 min RAm Right Ascension J2000 (minutes)
34- 38 F5.2 s RAs Right Ascension J2000 (seconds)
42 A1 --- DE- Declination J2000 (sign)
43- 44 I2 deg DEd Declination J2000 (degrees)
46- 47 I2 arcmin DEm Declination J2000 (minutes)
49- 52 F4.1 arcsec DEs Declination J2000 (seconds)
56- 60 F5.1 mas/yr pmRA UCAC4 proper motion in right ascension,
(pmRA*cos(DE))
63- 65 F3.1 mas/yr e_pmRA Error on pmRAcosDE
69- 73 F5.1 mas/yr pmDE UCAC4 proper motion in Declination
76- 78 F3.1 mas/yr e_pmDE Error on pmDE
82- 86 F5.2 mag Bmag B magnitude from APASS (1)
90- 94 F5.2 mag Vmag V magnitude from APASS (1)
98-102 F5.2 mag gmag g magnitude from APASS (1)
106-110 F5.2 mag rmag r magnitude from APASS (1)
114-118 F5.2 mag imag i magnitude from APASS (1)
122-126 F5.2 mag Jmag 2MASS J magnitude (1.2um)
129-132 F4.2 mag e_Jmag Error in J magnitude (rounded to 0.01mag)
136-140 F5.2 mag Hmag 2MASS H magnitude (1.6um)
143-146 F4.2 mag e_Hmag Error in H magnitude (rounded to 0.01mag)
150-154 F5.2 mag Kmag 2MASS Ks magnitude (2.2um)
157-160 F4.2 mag e_Kmag Error in Ks magnitude (rounded to 0.01mag)
164-167 F4.2 mag Avg Visual extinction from adaptive grid
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Note (1): AAVSO Photometric All-Sky Survey, see
http://www.aavso.org/apass
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object name (ChaI-PM-NN or ChaII-PM-NN)
15- 24 A10 --- UCAC4 UCAC4 identificator (FFF-NNNNNN)
28- 50 A23 --- SIMBAD SIMBAD Name
54- 58 F5.1 mas/yr pmRAU UCAC4 proper motion in right ascension,
(pmRA*cos(DE))
61- 63 F3.1 mas/yr e_pmRAU Error on pmRAU
67- 70 F4.1 mas/yr pmDEU4 UCAC4 proper motion in Dec
73- 75 F3.1 mas/yr e_pmDEU4 Error on pmDEU
79- 83 F5.1 mas/yr pmRAT ? Tycho-2 proper motion in right ascension,
(pmRA*cos(DE))
86- 88 F3.1 mas/yr e_pmRAT ? Error on pmRAT
92- 96 F5.1 mas/yr pmDET ? Tycho-2 proper motion in Dec
99-101 F3.1 mas/yr e_pmDET ? Error on pmDET
105-108 F4.1 km/s RV ? RAVE radial velocity (only for ChaI-PM-13)
111-113 F3.1 km/s e_RV ? Error in RV (only for ChaI-PM-13)
117-119 A3 --- SpT MK Spectral type (only for ChaII-PM-18)
124-127 A4 --- Ref [T,R ] Reference(s): Tycho, Rave (1)
132-134 A3 --- Com Remarks (bkg = reported background object)
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Note (1): Reference are:
T = Tycho-2: Hog et al. 2000A&A...357..367H 2000A&A...357..367H (Cat. I/259)
R = RAVE: Siebert et al. Cat. III/265
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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- 11 A11 --- Name Object name (ChaI-PM-NN or ChaII-PM-NN)
13- 29 A17 --- Filter Filter identificator (1)
31- 38 F8.1 0.1nm lambda [4280/232096] Effective wavelength (Å)
41 A1 --- l_Flux Limit flag on Flux (upper limit)
42- 60 E19.13 cW/m2/nm Flux Flux (in erg/s/cm^2/Å)
64- 82 E19.13 cW/m2/nm e_Flux ? Flux error
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Note (1): Photometric catalogues:
Generis/Johnson: Zacharias et al., 2013AJ....145...44Z 2013AJ....145...44Z, Cat. I/322
SLOAN : Zacharias et al., 2013AJ....145...44Z 2013AJ....145...44Z, Cat. I/322
Tycho-2: Hog et al. 2000A&A...357..367H 2000A&A...357..367H, Cat. I/259
DENIS: 2005yCat.2263....0T 2005yCat.2263....0T, Cat. B/denis
2MASS: Skrutskie et al. 2006AJ....131.1163S 2006AJ....131.1163S, Cat. VII/233
WISE: Wright et al. 2010AJ....140.1868W 2010AJ....140.1868W, See Cat. II/311
Spitzer: Alcala et al. 2008, Cat. J/ApJ/676/427;
Luhman et al. 2008, Cat. J/ApJ/675/1375 and unpublished
AKARI: Ishihara et al. 2010A&A...514A...1I 2010A&A...514A...1I, Cat. II/297
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object name (ChaI-PM-NN or ChaII-PM-NN)
16- 23 A8 --- Model Model grid of the best fit
27- 32 F6.2 --- chi2 Reduced χ2 of best fit
36- 39 I4 K Teff Best-fitting effective temperature
43- 46 F4.2 --- PTeff [0/1] Bayesian probability of Teff
50- 52 F3.1 [cm/s2] logg Best-fitting surface gravity
56- 59 F4.2 --- Plogg [0/1] Bayesian probability of logg
63- 66 F4.2 mag Av Best-fitting optical extinction
70- 73 F4.2 --- PAv [0/1] Bayesian probability of Av
79- 83 F5.2 [Lsun] logL Bolometric luminosity (log)
86- 89 F4.2 [Lsun] e_logL Error in logL
93- 94 I2 Myr Age [1/20]? Age
98-101 F4.2 Msun Mass [0.3/1.3]? Mass
105-106 A2 --- Mm [nmc? ] Membership status, m=member (1)
110 I1 --- Com [1/2]? Possible mid-IR excess (2)
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Note (1): Membership status as follows:
m = probable member
m? = possible member
nm = nonmember
nc = not classified
Note (2): Remark as follows:
1 = Object with possible mid-infrared excess starting around 10 microns
2 = Object with possible mid-infrared excess starting around 20 microns
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2MASS 2MASS ID (HHMMSSss+DDMMSSs; J2000)
21- 28 A8 --- Model Model grid of the best fit: BT-Settl or Kurucz
31- 36 F6.2 --- chi2 Reduced χ2 of best fit
40- 44 I5 K Teff Best-fitting effective temperature
48- 51 F4.2 --- PTeff [0/1] Bayesian probability of Teff
55- 57 F3.1 [cm/s2] logg Best-fitting surface gravity
61- 64 F4.2 --- Plogg [0/1] Bayesian probability of logg
68- 70 F3.1 mag Av Best-fitting optical extinction
74- 77 F4.2 --- PAv [0/1] Bayesian probability of Av
80- 84 F5.2 [Lsun] logL Logarithm of bolometric luminosity
87- 90 F4.2 [Lsun] e_logL Error in logL
94- 95 I2 Myr Age ? Age
99-102 F4.2 Msun Mass ? Mass (or lower mass range)
105-108 F4.2 Msun B_Mass ? Mass range (or upper mass)
117-119 A3 --- Cl SED classification (Class II, III or
T0=transitional object)
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Acknowledgements:
Belen Lopez Marti, <belen( at )cab.inta-csic.es>
References:
Lopez Marti et al., Paper I. 2013A&A...551A..46L 2013A&A...551A..46L, Cat. J/A+A/551/A46
(End) Belen Lopez Marti [CAB] 12-Jul-2013