J/A+A/521/A18 Blue stars with disk photometry in NGC 6611 (Guarcello+, 2010)
Pre-main sequence stars with disks in the Eagle nebula observed in scattered
light.
Guarcello M.G., Damiani F., Micela G., Peres G., Prisinzano L., Sciortino S.
<Astron. Astrophys. 521, A18 (2010)>
=2010A&A...521A..18G 2010A&A...521A..18G
ADC_Keywords: Clusters, open ; Stars, blue ; Photometry, UBVRI ;
Photometry, infrared ; Photometry, millimetric/submm
Keywords: accretion, accretion disks - scattering - protoplanetary disks -
circumstellar matter - stars: pre-main sequence -
Hertzsprung-Russell and C-M diagrams
Abstract:
NGC 6611 and its parental cloud, the Eagle Nebula (M 16), are
well-studied star-forming regions, thanks to their large content of
both OB stars and stars with disks and the observed ongoing star
formation. In our previous studies of the Eagle Nebula, we identified
834 disk-bearing stars associated with the cloud, after detecting
their excesses in NIR bands from J band to 8.0um.
In this paper, we study in detail the nature of a subsample of
disk-bearing stars that show peculiar characteristics. They appear
older than the other members in the V vs. V-I diagram, and/or they
have one or more IRAC colors at pure photospheric values, despite
showing NIR excesses, when optical and infrared colors are compared.
Description:
This catalog contains coordinates and both optical and infrared
photometry, plus usefull tags, of the Blue Stars With Disk (BWE stars)
discussed in detail in Guarcello et al. (2010, in prep): "Pre-main
sequence stars with disks in the Eagle nebula observed in scattered
light". The optical photometry in BVI bands comes from observations
with WFI@ESO (Guarcello et al. 2007, Cat. J/A+A/462/245); JHK
photometry have been obtained from 2MASS/PSC and UKIDSS/GPS catalogs
(Bonatto et al., 2006A&A...445..567B 2006A&A...445..567B, Guarcello et al., 2007, Cat.
J/A+A/462/245 and 2010, in prep); IRAC data are from GLIMPSE public
survey (Indebetouw 2007ApJ...666..321I 2007ApJ...666..321I, Guarcello et al., 2009, Cat.
J/A+A/496/453); X-ray data from observations with Chandra/ACIS-I
(Linsky et al. 2007, Cat. J/ApJ/654/347, Guarcello et al., 2007,
Cat. J/A+A/462/245, Guarcello et al., 2010, in prep). BWE stars have
been studied by analizing their Spectral Energy Distribution (SED)
using the grid of YSO models developed by Robitaille et al.
2006ApJS..167..256R 2006ApJS..167..256R.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 241 81 Catalog of blue stars with disk
(or BWE = Blue stars With Excess)
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See also:
J/ApJ/654/347 : Chandra X-ray observations in Eagle Nebula. I. (Linsky+, 2007)
J/A+A/462/245 : BVI photometry in NGC 6611 (Guarcello+, 2007)
J/A+A/496/453 : Photometry of candidate members of NGC 6611 (Guarcello+, 2009)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Stellar IDs (6611-NNNNN; <[GDM2010] 6611 NNNNN>
in Simbad)
12- 21 F10.6 deg RAdeg Right ascension (J2000)
23- 32 F10.6 deg DEdeg Declination (J2000)
34- 39 F6.3 mag Bmag WFI B (Johnson) magnitude
41- 45 F5.3 mag e_Bmag WFI B (Johnson) magnitude error
47- 52 F6.3 mag Vmag WFI V (Johnson) magnitude
54- 58 F5.3 mag e_Vmag WFI V (Johnson) magnitude error
60- 65 F6.3 mag Icmag WFI Ic (Cousins) magnitude
67- 71 F5.3 mag e_Icmag WFI Ic (Cousins) magnitude error
73- 78 F6.3 mag Jmag ?=99.999 UKIDSS J magnitude
80- 84 F5.3 mag e_Jmag ?=9.999 UKIDSS J magnitude error
86- 91 F6.3 mag Hmag ?=99.999 UKIDSS H magnitude
93- 97 F5.3 mag e_Hmag ?=9.999 UKIDSS H magnitude error
99-104 F6.3 mag Kmag ?=99.999 UKIDSS K magnitude
106-110 F5.3 mag e_Kmag ?=9.999 UKIDSS K magnitude error
112-117 F6.3 mag J2mag ?=99.999 2MASS J magnitude
119-123 F5.3 mag e_J2mag ?=9.999 2MASS J magnitude error
125-130 F6.3 mag H2mag ?=99.999 2MASS H magnitude
132-136 F5.3 mag e_H2mag ?=9.999 2MASS H magnitude error
138-143 F6.3 mag K2mag ?=99.999 2MASS Ks magnitude
145-149 F5.3 mag e_K2mag ?=9.999 2MASS Ks magnitude error
151-156 F6.3 mag [3.6] ?=99.999 Spitzer/IRAC 3.6 micron magnitude
158-162 F5.3 mag e_[3.6] ?=9.999 Spitzer/IRAC 3.6 micron magnitude error
164-169 F6.3 mag [4.5] ?=99.999 Spitzer/IRAC 4.5 micron magnitude
171-175 F5.3 mag e_[4.5] ?=9.999 Spitzer/IRAC 4.5 micron magnitude error
177-182 F6.3 mag [5.8] ?=99.999 Spitzer/IRAC 5.8 micron magnitude
184-188 F5.3 mag e_[5.8] ?=9.999 Spitzer/IRAC 5.8 micron magnitude error
190-195 F6.3 mag [8.0] ?=99.999 Spitzer/IRAC 8.0 micron magnitude
197-201 F5.3 mag e_[8.0] ?=9.999 Spitzer/IRAC 8.0 micron magnitude error
203 I1 --- X [0/1] X detection flag (1 for X-ray counterpart)
205 I1 --- f_Jmag [0/2] Excess flag in J band (1)
207 I1 --- f_Hmag [0/2] Excess flag in H band (1)
209 I1 --- f_Kmag [0/2] Excess flag in K band (1)
211 I1 --- f_[3.6] [0/2] Excess flag in [3.6] (1)
213 I1 --- f_[4.5] [0/2] Excess flag in [4.5] (1)
215 I1 --- f_[5.8] [0/2] Excess flag in [5.8] (1)
217 I1 --- f_[8.0] [0/2] Excess flag in [8.0] (1)
219-225 A7 --- FIT SED fitting flag (2)
227-229 A3 --- Opt [YES NO NAN] Optical excesses flag (3)
231-233 A3 --- Sct [YES NO NAN] Scattering flag (4)
235-237 A3 --- Obs [YES NO NAN] Obscuration by the disk flag (5)
239-241 A3 --- O+S [YES NO NAN] Obscuration+scattering flag (6)
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Note (1): Excess flag as follows;
0 = no excess in the particular band
1 = star show excess in the particular band
2 = star not observed in the band
Note (2): Flag for SED fitting:
notgood = stellar SED did not match any model SED
good = stellar SED matched some model SED
undet = numbers of compatible model SEDs was so high that stellar
parameters are not determined
Note (3): Flag for optical excesses:
YES = stellar SED is compatible with at least one SED model showing
excesses in optical bands due to accretion
NO = stellar SED not compatible
NAN = not analysed
Note (4): Flag for scattering:
YES = stellar SED is compatible with at least one SED model whose
optical SED is affected by scattered light
NO = stellar SED not compatible
NAN = not analysed
Note (5): Flag for obscuration by the disk:
YES = stellar SED is compatible with at least one SED model which
predicts that stellar photosphere is partially obscured by the disk
NO = stellar SED not compatible
NAN = not analysed
Note (6): Flag for obscuration+scattering:
YES = stellar SED is compatible with at least one SED model showing
NO = stellar SED not compatible
NAN = not analysed
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Acknowledgements:
Mario Giuseppe Guarcello, mguarcel(at)head.cfa.harvard.edu
References:
Guarcello, Micela, Peres, Prisinzano, Sciortino, 2010A&A..in.prep. :
Triggering of star formation by OB stars and induced disks photoevaporation
the Eagle Nebula
(End) Mario Guarcello [SAO, Cambridge], Patricia Vannier [CDS] 10-Jun-2010