J/AJ/132/2296 NICMOS observations of Mon R2 cluster (Andersen+, 2006)
NICMOS2 Hubble space telescope observations of the embedded cluster associated
with Mon R2: constraining the substellar initial mass function.
Andersen M., Meyer M.R., Oppenheimer B., Dougados C., Carpenter J.
<Astron. J., 132, 2296-2308 (2006)>
=2006AJ....132.2296A 2006AJ....132.2296A
ADC_Keywords: Clusters, open ; Photometry, HST
Keywords: open clusters and associations: individual (Mon R2) -
stars: formation - stars: low-mass, brown dwarfs -
stars: luminosity function, mass function - stars: pre-main sequence
Abstract:
We have analyzed Hubble Space Telescope NICMOS2 F110W-, F160W-,
F165M-, and F207M-band images covering the central 1'x1' region of the
cluster associated with Mon R2 in order to constrain the initial mass
function (IMF) down to 20MJ. The flux ratio between the F165M and
F160W bands was used to measure the strength of the water-band
absorption feature and select a sample of 12 out of the total sample
of 181 objects that have effective temperatures between 2700 and
3300K.
Description:
HST NICMOS2 observations of the central 1'x1' of Mon R2 were obtained
in Cycle 7 under program number 7417, on 1997 Dec 1 and 5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 89 181 The HST/NICMOS photometry for Mon R2
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See also:
J/AJ/114/198 : The Monoceros R2 Cluster (Carpenter+ 1997)
J/ApJ/567/423 : Chandra obs. of YSOs in Monoceros R2 (Kohno+, 2002)
J/PASJ/55/635 : Chandra observations of Monoceros R2 (Nakajima+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [AMO2006] Source identification
5 I1 h RAh Hour of Right Ascension (J2000)
7- 8 I2 min RAm Minute of Right Ascension (J2000)
10- 14 F5.2 s RAs Second of Right Ascension (J2000)
16 A1 --- DE- Sign of the Declination (J2000)
17 I1 deg DEd Degree of Declination (J2000)
19- 20 I2 arcmin DEm Arcminute of Declination (J2000)
22- 25 F4.1 arcsec DEs Arcsecond of Declination (J2000)
27- 31 F5.2 mag F110W ? HST/NICMOS F110W band magnitude 1100nm
33- 36 F4.2 mag e_F110W ? Uncertainty in F110W
38- 42 F5.2 mag F160W ? HST/NICMOS F160W band magnitude 1600nm
44- 48 F5.3 mag e_F160W ? Uncertainty in F160W
50- 54 F5.2 mag F165M ? HST/NICMOS F165M band magnitude 1650nm
56- 60 F5.2 mag e_F165M ? Uncertainty in F165M
62- 66 F5.2 mag F207M HST/NICMOS F207M band magnitude 2070nm
68- 71 F4.2 mag e_F207M Uncertainty in F207M
73- 89 A17 --- 2MASS The 2MASS identification
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 25-Jul-2008