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J/A+A/531/A141      Physical parameters of PMS in open clusters (Delgado+, 2011)

Physical parameters of pre-main sequence stars in open clusters. Delgado A.J., Alfaro E.J., Yun J.L. <Astron. Astrophys. 531, A141 (2011)> =2011A&A...531A.141D
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Stars, dwarfs ; Photometry, UBVRI ; Stars, ages ; Stars, masses ; Effective temperatures Keywords: stars: pre-main sequence - stars: formation - open cluster and associations: general Abstract: Our aims are twofold: To determine the physical parameters of PMS members in young open clusters (YOCs), and to check and compare the performances of different model isochrones. We compare UBVRI photometric observations of eleven YOCs to theoretical isochrones in the photometric diagrams. The comparison simultaneously provides membership assignments for MS and PMS stars and estimates for the masses, ages, and spatial distribution of the candidate members. The relations found between the different cluster parameters show that the procedure applied to assign cluster membership, and to measure physical parameters for the selected members, is well founded. Description: Photometric colors in the UBVRI system for 27040 stars, in the fields of 11 Young Open Clusters. The membership and physical parameters are listed. For MS and post MS candidate members, only the mass value is listed. It is calculated from comparison to ZAMS and isochrones by Girardi et al. (2002A&A...391..195G). For PMS candidate members, the age, mass, luminosity, and effective temperature are listed as obtained from comparison to four PMS model isochrones: D'Antona and Mazzitelli (1997MmSAI..68..807D), Palla and Stahler (1999ApJ...525..772P), Siess et al. (2000A&A...358..593S), and Yi et al. (2001ApJS..136..417Y). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 58 11 Clusters observed catalog.dat 214 27040 Photometric results and physical parameters
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15- 20 F6.2 deg GLON Galactic longitude 22- 26 F5.2 deg GLAT Galactic latitude 28- 31 F4.2 mag E(B-V) Colour excess 33- 36 F4.1 mag m-M Distance modulus 38- 40 F3.1 [yr] logAge Cluster age 42- 45 F4.2 [yr] e_logAge Error on Age 47- 48 I2 --- Nstar Number of star used in age calculation 50- 58 A9 --- OCL Cluster name as in file catalog.dat
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 9 A9 --- OCL Cluster identification 11- 26 A16 --- 2MASS Identification in 2MASS (HHMMSSss+DDMMSSs) 28- 32 I5 --- Seq Own identification number of the star 34- 43 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 45- 54 F10.6 deg DEdeg Declination in decimal degrees (J2000) 56- 60 F5.2 mag Vmag Johnson V magnitude (1) 62- 66 F5.2 mag e_Vmag Error in V magnitude (1) 68- 72 F5.2 mag U-B ?=99.99 Johnson U-B colour index (1) 74- 78 F5.2 mag e_U-B ?=99.99 Error in U-B (1) 80- 84 F5.2 mag B-V ?=99.99 Johnson B-V colour index (1) 86- 90 F5.2 mag e_B-V ?=99.99 Error in B-V (1) 92- 96 F5.2 mag V-Rc ?=99.99 Johnson-Cousins V-Rc colour index (1) 98-102 F5.2 mag e_V-Rc ?=99.99 Error in V-Rc (1) 104-108 F5.2 mag V-Ic ?=99.99 Johnson-Cousins V-Ic colour index (1) 110-114 F5.2 mag e_V-Ic ?=99.99 Error in V-Ic (1) 116 I1 --- MmD [0/2] Membership according to D'Antona & Mazzitelli (1997MmSAI..68..807D) isochrones (2) 118-121 F4.1 Myr AgeD ?=99.9 Age according to D'Antona & Mazzitelli (1997MmSAI..68..807D) isochrones (1) 123-127 F5.2 Msun MassD ?=99.99 Mass according to D'Antona & Mazzitelli (1997MmSAI..68..807D) isochrones (1) 129-133 F5.2 [Lsun] logLD ?=99.99 Luminosity according to D'Antona & Mazzitelli (1997MmSAI..68..807D) isochrones (1) 135-139 F5.2 [K] logTeD ?=99.99 Effective temperature according to D'Antona & Mazzitelli (1997MmSAI..68..807D) isochrones (1) 141 I1 --- MmP [0/2] Membership according to Palla & Stahler (1999ApJ...525..772P) isochrones (2) 143-146 F4.1 Myr AgeP ?=99.9 Age according to Palla & Stahler (1999ApJ...525..772P) isochrones (1) 148-152 F5.2 Msun MassP ?=99.99 Mass according to Palla & Stahler (1999ApJ...525..772P) isochrones (1) 154-158 F5.2 [Lsun] logLP ?=99.99 Luminosity according to Palla & Stahler (1999ApJ...525..772P) isochrones (1) 160-164 F5.2 [K] logTeP ?=99.99 Effective temperature according to Palla & Stahler (1999ApJ...525..772P) isochrones (1) 166 I1 --- MmS [0/2] Membership according to Siess et al. (2000A&A...358..593S) (2) 168-171 F4.1 Myr AgeS ?=99.9 Age according to Siess et al. (2000A&A...358..593S) isochrones (1) 173-177 F5.2 Msun MassS ?=99.99 Mass according to Siess et al. (2000A&A...358..593S) isochrones (1) 179-183 F5.2 [Lsun] logLS ?=99.99 Luminosity according to Siess et al. (2000A&A...358..593S) isochrones (1) 185-189 F5.2 [K] logTeS ?=99.99 Effective temperature according to Siess et al. (2000A&A...358..593S) isochrones (1) 191 I1 --- MmY [0/2] Membership according to Yi et al. (2001ApJS..136..417Y) isochrones (2) 193-196 F4.1 Myr AgeY ?=99.9 Age according to Yi et al. (2001ApJS..136..417Y) isochrones (1) 198-202 F5.2 Msun MassY ?=99.99 Mass according to Yi et al. (2001ApJS..136..417Y) isochrones (1) 204-208 F5.2 [Lsun] logLYo ?=99.99 Luminosity according to Yi et al. (2001ApJS..136..417Y) isochrones (1) 210-214 F5.2 [K] logTeY ?=99.99 Effective temperature according to Yi et al. (2001ApJS..136..417Y) isochrones (1)
Note (1): A 99.99 entry indicates a non-detection. Note (2): Membership assignment as follows: 0 = No assignment 1 = MS or post-MS member 2 = PMS member
Acknowledgements: A.J. Delgado, delgado(at)iaa.es
(End) Antonio Jesus Delgado [IAA-CSIC], Patricia Vannier [CDS] 14-Jun-2011
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