J/ApJ/675/1375 IRAC/MIPS photometry in Cha I (Luhman+, 2008)
The disk population of the Chamaeleon I star-forming region.
Luhman K.L., Allen L.E., Allen P.R., Gutermuth R.A., Hartmann L.,
Mamajek E.E., Megeath S.T., Myers P.C., Fazio G.G.
<Astrophys. J., 675, 1375-1406 (2008)>
=2008ApJ...675.1375L 2008ApJ...675.1375L
ADC_Keywords: Molecular clouds ; Stars, pre-main sequence ;
MK spectral classification ; Photometry, millimetric/submm ;
Photometry, infrared
Mission_Name: Spitzer
Keywords: accretion, accretion disks - planetary systems: protoplanetary disks -
stars: formation - stars: low-mass, brown dwarfs -
stars: pre-main sequence
Abstract:
We present a census of circumstellar disks in the Chamaeleon I
star-forming region. Using the Infrared Array Camera and the Multiband
Imaging Photometer on board the Spitzer Space Telescope, we have
obtained images of Chamaeleon I at 3.6, 4.5, 5.8, 8.0, and 24um. To
search for new disk-bearing members of the cluster, we have performed
spectroscopy on objects that have red colors in these data. Through
this work, we have discovered four new members of Chamaeleon I with
spectral types of M4, M6, M7.5, and L0.
Description:
For our census of the disk population in Chamaeleon I, we use images
at 3.6, 4.5, 5.8, and 8.0um obtained with Spitzer's Infrared Array
Camera (IRAC) and images at 24um obtained with the Multiband Imaging
Photometer for Spitzer (MIPS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 97 4 New members of Chamaeleon I
table5.dat 112 13 Spitzer photometry for nonmembers
table6.dat 124 10 Spitzer photometry for candidate members of
Chamaeleon I
table7.dat 124 208 Spitzer photometry for known members of
Chamaeleon I
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See also:
J/MNRAS/267/755 : Polarimetry in the Chamaeleon I Dark Cloud (McGregor+, 1994)
J/A+A/357/219 : ISOCAM observations in Cha I. (Persi+, 2000)
J/AJ/121/974 : JHK photometry in Cha I (Gomez+, 2001)
J/AJ/121/2673 : 3µm survey of the Chamaeleon I dark cloud (Kenyon+, 2001)
J/AJ/124/1001 : JHKs photometry of Cha I variables (Carpenter, 2002)
J/ApJ/593/1093 : IC 348 membership (Luhman+, 2003)
J/ApJ/614/267 : Chandra sources in Cha I North (Feigelson+, 2004)
J/A+A/416/555 : Brown Dwarfs in ChaI Dark Cloud (Lopez-Marti+ 2004) [LES2004]
J/A+A/423/1029 : XMM-Newton obs, in Cha I South (Stelzer+, 2004)
J/A+A/461/669 : XMM observations of Cha I dark cloud (Robrade+, 2007)
J/ApJS/173/104 : Stellar population in Chamaeleon I (Luhman, 2007)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Name (G1)
23- 26 A4 --- SpT MK spectral type
28 I1 --- e_SpT rms uncertainty on SpType
30- 33 I4 K Teff Effective temperature (1)
35- 37 F3.1 mag AJ Absorption in J band
39- 45 F7.5 solLum Lbol Bolometric luminosity
47- 59 A13 --- Memb Membership evidence (2)
61- 65 F5.2 mag Jmag ?=- J magnitude (3)
67- 70 F4.2 mag e_Jmag ?=- rms uncertainty on Jmag
72- 76 F5.2 mag Hmag H magnitude (3)
78- 81 F4.2 mag e_Hmag rms uncertainty on Hmag
83- 87 F5.2 mag Ksmag Ks magnitude (3)
89- 92 F4.2 mag e_Ksmag rms uncertainty on Ksmag
94- 97 A4 --- Night Night number(s)
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Note (1): Temperature scale from Luhman et al. (2003, Cat. J/ApJ/593/1093).
For Cha J11070768-7626326, that scale has been extrapolated to L0.
Note (2): Membership in Chamaeleon is indicated by AV≳1 and a position
above the main sequence for the distance of Chamaeleon ("AV"),
strong emission lines ("e"), IR excess emission ("ex"), or the shape
of the gravity-sensitive H2 O bands ("H2O").
Note (3): From the 2MASS Point Source Catalog for 2M J11062942-7724586 and
2M J11070369-7724307 and from the ISPI images of Luhman (2007, Cat.
J/ApJS/173/104) for Cha J11070768-7626326.
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Byte-by-byte Description of file: table[567].dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Name (G1)
22- 24 A3 --- n_Name Note on Name (1)
26- 42 A17 --- OName Other name
44- 48 F5.2 mag [3.6] ? Spitzer/IRAC 3.6 µm magnitude
50- 53 F4.2 mag e_[3.6] ? rms uncertainty on [3.6]
54 A1 --- n_[3.6] [sobEn] Note on [3.6] (2)
56- 60 F5.2 mag [4.5] ? Spitzer/IRAC 4.5 µm magnitude
62- 65 F4.2 mag e_[4.5] ? rms uncertainty on [4.5]
66 A1 --- n_[4.5] [sobEn] Note on [4.5] (2)
68- 72 F5.2 mag [5.8] ? Spitzer/IRAC 5.8 µm magnitude
74- 77 F4.2 mag e_[5.8] ? rms uncertainty on [5.8]
78 A1 --- n_[5.8] [sobEn] Note on [5.8] (2)
80- 84 F5.2 mag [8.0] ? Spitzer/IRAC 8.0 µm magnitude
86- 89 F4.2 mag e_[8.0] ? rms uncertainty on [8.0]
90 A1 --- n_[8.0] [sobEn] Note on [8.0] (2)
92-101 A10 "YYYY/MM/DD" Idate Date of IRAC observations
103-107 F5.2 mag [24] ? Spitzer/MIPS 24 µm magnitude
109-112 F4.2 mag e_[24] ? rms uncertainty on [24]
113 A1 --- n_[24] [sobEn] Note on [24] (2)
115-124 A10 "YYYY/MM/DD" Mdate Date of MIPS observations
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Note (1): Notes as follows:
a = Cha 424 (<[LES2004] 424> in Simbad)
b = 7" from 2M J11062942-7724586
c = Possible Class I source
d = 2' from RX J1108.8-7519A and RX J1108.8-7519B
e = OTS 32; 18" from Hn 11
f = 8" from RX J1129.2-7546
Note (2): Flags as follows when no values:
s = measurements are absent because of saturation
o = measurements are absent because of a position outside the field
of view of the filter
b = measurements are absent because of contamination by a cosmic ray
or a ghost from a bright star
n = measurements are absent because of nondetection
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Global notes:
Note (G1): In Simbad, sources named "2M" are "2MASS", and sources
"Cha JHHMMSSss+DDMMSSs" are <[L2007b] Cha JHHMMSSss+DDMMSSs>
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Jul-2010