J/ApJ/638/897 IR photometry in Trumpler 37 and NGC 7160 (Sicilia-Aguilar+, 2006)
Disk evolution in Cep OB2: results from the Spitzer Space Telescope.
Sicilia-Aguilar A., Hartmann L., Calvet N., Megeath S.T., Muzerolle J.,
Allen L., D'Alessio P., Merin B., Stauffer J., Young E., Lada C.
<Astrophys. J., 638, 897-919 (2006)>
=2006ApJ...638..897S 2006ApJ...638..897S
ADC_Keywords: Stars, pre-main sequence ; Photometry, infrared
Keywords: accretion, accretion disks - planetary systems: protoplanetary disks -
stars: pre-main-sequence
Abstract:
We present the results of an infrared imaging survey of two clusters
in the Cep OB2 Association, Tr 37 and NGC 7160, using the IRAC and
MIPS instruments on board the Spitzer Space Telescope. Our
observations cover the wavelength range from 3.6 to 24µm, allowing
us to detect disk emission over a typical range of radii ∼0.1 to ∼20AU
from the central star.
Description:
Tr 37 and NGC 7160 were observed using the IRAC on Spitzer on 2003
December and 2004 March, respectively, as a part of an IRAC GTO
program to study protoplanetary disks and disk evolution. IRAC is
equipped with a four-channel camera, with central wavelengths of
approximately 3.6, 4.5, 5.8, and 8µm. We obtained 24 and 70µm
photometry for Tr 37 and NGC 7160 using MIPS for Spitzer in 2004 July
and August, respectively.
Objects:
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RA (2000) DE Designation(s)
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21 38 08.7 +57 26 48 Trumpler 37 = Cl Trumpler 37
21 53 36 +62 36.0 NGC 7160 = C 2152+623
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 138 166 Summary of IRAC and MIPS magnitudes for low-mass
stars in Tr37
table3.dat 135 48 Summary of IRAC and MIPS magnitudes for low-mass
Stars in NGC 7160
table4.dat 143 58 Summary of IRAC and MIPS magnitudes for high-
and intermediate-mass stars in Tr 37
table5.dat 135 70 Summary of IRAC and MIPS magnitudes for high-
and intermediate-mass stars in NGC 7160
table6.dat 148 57 2MASS, IRAC, and MIPS magnitudes for the stars
in the Tr 37 globule
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See also:
J/AJ/130/188 : Young stars in Trumpler 37 and NGC 7160 (Sicilia-Aguilar+ 2005)
J/AJ/128/805 : Low-mass stars in the Cepheus OB2 region
(Sicilia-Aguilar+ 2004)
Byte-by-byte Description of file: table[2-6].dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- ID Source identification (1)
25- 30 F6.3 mag 3.6mag ? Magnitude at 3.6µm
32- 36 F5.3 mag e_3.6mag ? Error in 3.6mag
38- 43 F6.3 mag 4.5mag ? Magnitude at 4.5µm
45- 49 F5.3 mag e_4.5mag ? Error in 4.5mag
51- 56 F6.3 mag 5.8mag ? Magnitude at 5.8µm
58- 62 F5.3 mag e_5.8mag ? Error in 5.8mag
64- 69 F6.3 mag 8mag ? Magnitude at 8µm
71- 75 F5.3 mag e_8mag ? Error in 8mag
77- 82 F6.3 mag 24mag ? Magnitude at 24µm
84- 88 F5.3 mag e_24mag ? Error in 24mag
89 A1 --- u_24mag Uncertainty flag on 24mag
91- 96 F6.3 mag Jmag ? 2MASS J magnitude
98-102 F5.3 mag e_Jmag ? Error in Jmag (2)
104-109 F6.3 mag Hmag ? 2MASS H magnitude
111-115 F5.3 mag e_Hmag ? Error in Hmag (2)
117-122 F6.3 mag Kmag ? 2MASS K magnitude
124-128 F5.3 mag e_Kmag ? Error in Kmag (2)
130-148 A19 --- Comment Comment (3)
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Note (1): Identifications are from:
* Table 2: NN-NNNN are from Sicilia-Aguilar et al. (2005, Cat.
J/AJ/130/188, [SHB2004] Trumpler 37 NN-NNNN in Simbad)
HHMMSSss+DDMMSSs are from 2MASS (Cat. II/246,
2MASS JHHMMSSss+DDMMSSs in Simbad)
* Table 3: NN-NNNN are from Sicilia-Aguilar et al. (2005, Cat.
J/AJ/130/188, [SHB2004] NGC 7160 NN-NNNN in Simbad)
* Table 4: Usual names
* Table 5: DG-NNNN are Cl* NGC 7160 DG NNNN in Simbad.
* Table 6: 8 stars without a 2MASS counterpart are designated by their
coordinates ([SHC2006b] JHHMMSS.ss+DDMMSS.s in Simbad) ;
the others are 2MASS JHHMMSSss+DDMMSSs.
Note (2): 9.999 indicates uncertainty in the measure.
Note (3): For table[2-5]:
A comment was added in the last column when the star is not present in
the MIPS field (NoMIPS) or in the IRAC field (NoIRAC). In some cases
the stars do not have either 3.6 and 5.8µm or 4.5 and 8µm
observations because of the mapping strategy. A colon indicates an
uncertain value. Other comments are:
Gl = star related to the globule;
cI = class I star;
TO = transition object;
e8 = small excess at 8µm but no other wavelengths;
P = IRAC and optical/JHK magnitudes do not match, possible problems or
strong variations;
D = optically thick disk, the value in parentheses shows the ratio of
the excess flux at 24µm compared to the photospheric flux
HAe/Be = Herbig Ae/Be star
(1) = for these close companions, it is unclear whether the Spitzer
magnitudes measured belonged to one or both stars together
(70) = MIPS 70µm data available:
(Table 2) for 13-277, flux 0.829±0.193Jy
(Table 4) for MVA-426, flux 0.426±0.140Jy
For table 6:
α = ID from Reach et al. (2004ApJS..154..385R 2004ApJS..154..385R, [RRY2004] aaa in Simbad);
II = Class II, or classical T Tauri Star;
I = Class I protostar;
: = uncertain class;
NN-NNNN = ID of the optical counterpart, if any (Sicilia-Aguilar et al., 2005,
Cat. J/AJ/130/188, [SHB2004] Trumpler 37 NN-NNNN in Simbad).
This column contains the ID from Reach et al. (2004ApJS..154..385R 2004ApJS..154..385R),
the type (II=Class II, or classical T Tauri Star; I=Class I
protostar, colon=uncertain class) based on the IRAC colors and SEDs,
and the ID of the optical counterpart, if any (Sicilia-Aguilar et
al., 2005, Cat. J/AJ/130/188).
Memb? = denotes the uncertain cluster members;
: = colons denote uncertain magnitudes (due to contamination by the
emission from the globule).
(2) = very close stars, impossible to determine if the 24µm emission
belongs to one or both of them.
(3) = observed with Hectospec (Sicilia-Aguilar et al., 2005, Cat.
J/AJ/130/188), confirmed member, no optical photometry.
(70) = MIPS 70µm flux detected:
14.571±1.088Jy for 21360798+5726371, and
1.458±0.470Jy for 21361664+5728404.
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History:
From electronic version of the journal
References:
Sicilia-Aguilar et al., Paper I 2004AJ....128..805S 2004AJ....128..805S, Cat. J/AJ/128/805
Sicilia-Aguilar et al., Paper II 2005AJ....130..188S 2005AJ....130..188S, Cat. J/AJ/130/188
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 27-Feb-2007