J/ApJ/675/1319 Infrared photometry of NGC 3603 (Harayama+, 2008)
The initial mass function of the massive star-forming region NGC 3603 from
near-infrared adaptive optics observations.
Harayama Y., Eisenhauer F., Martins F.
<Astrophys. J., 675, 1319-1342 (2008)>
=2008ApJ...675.1319H 2008ApJ...675.1319H
ADC_Keywords: H II regions ; Photometry, infrared
Keywords: H II regions - open clusters and associations: individual (NGC 3603) -
stars: formation - stars: luminosity function, mass function -
stars: pre-main sequence
Abstract:
We study the initial mass function (IMF) of one of the most massive
Galactic star-forming regions NGC 3603 to answer a fundamental
question in current astrophysics: is the IMF universal, or does it
vary? Using our very deep, high angular resolution JHKSL' images
obtained with NAOS-CONICA at the VLT at ESO, we have successfully
revealed the stellar population down to the subsolar mass range in the
core of the starburst cluster.
Description:
Observations were carried out in two periods, on 2003 March 18-21 and
2005 February 14-16, using the AO system NACO at the VLT at ESO on
Paranal, Chile. In the following analysis we mainly use the data
obtained in the second observing run because of its better data
quality.
In addition to the high-resolution NACO observations of the cluster
center, we analyzed the VLT/ISAAC JSHKS-band data sets of a wider
field of view retrieved from the ESO archive facility.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 88 256 Photometry list
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See also:
J/AJ/127/1014 : CCD UBVRIHa photometry in NGC 3603 (Sung+, 2004)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- No [1/256] Running identification number
<[HEM2008] NNN> in Simbad
5- 10 F6.2 arcsec oRA Offset in Right Ascension (1)
12- 17 F6.2 arcsec oDE Offset in Declination (1)
19- 23 F5.2 mag Jmag J band magnitude
25- 29 F5.2 mag Hmag H band magnitude
31- 35 F5.2 mag Ksmag KS band magnitude
37- 41 F5.2 mag L'mag ? L' band magnitude (2)
43- 53 A11 --- SpType MK spectral type (3)
55 A1 --- f_MDS94 [H] H indicates that source is found to have a
X-ray counterpart by Moffat et al.
(2002ApJ...573..191M 2002ApJ...573..191M)
56- 57 I2 --- MDS94 ? Identification in Moffat et al.
(1994ApJ...436..183M 1994ApJ...436..183M) (4)
58- 66 A9 --- OName Other names (5)
68- 73 A6 --- Rem Remarks on Moffat names (6)
75- 76 A2 --- NS03 Identification in Nurnberger & Stanke
(2003A&A...400..223N 2003A&A...400..223N) (7)
78- 79 A2 --- n_NS03 Note on NS03 (8)
81- 85 I5 --- SB04 ? Identification in Sung & Bessel
(2004, Cat. J/AJ/127/1014) (9)
87- 88 A2 --- n_SB04 "e1" indicates that Stars 21 and 52 together
would correspond to 10207
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Note (1): Source location is shown in an offset from the center of the
cluster (J2000): 11:15:07.337-61:15:38.19
(instead of 11:15:05.90-61:15:28.4 as indicated in the paper)
Note (2): Note that, since the photometric calibration of the L' band
photometry was done by merely one data set of a standard star,
the presented L' band magnitude has to be considered as a
roughly-calibrated photometry.
Note (3): Adopted from a list in Crowther & Dessart (1998MNRAS.296..622C 1998MNRAS.296..622C)
(Tab. 8 therein) which consists of spectra types in their study
combined with those in Moffat (1983A&A...124..273M 1983A&A...124..273M) and Drissen et al.
(1995AJ....110.2235D 1995AJ....110.2235D).
Note (4): Designated IDs of potential counterparts in HST optical
detections by Moffat et al. (1994ApJ...436..183M 1994ApJ...436..183M), named
<Cl* NGC 3603 MDS NN> in Simbad.
Note (5): IDs originated in previous works such as Melnick et al.
(1989A&A...213...89M 1989A&A...213...89M); letters were adopted from tables in Moffat
et al. (1994ApJ...436..183M 1994ApJ...436..183M). The letters A-F were originated in
van den Bos (1928BAN.....4..261V 1928BAN.....4..261V) (G in Walborn 1973ApJ...182L..21W 1973ApJ...182L..21W),
and the source A was resolved into A1-3 by Hofmann & Weigelt
(1986A&A...167L..15H 1986A&A...167L..15H).
Note (6): Notes as follows:
c1 = Star 19 and 45 together would correspond to MDS-61 (G/MTT-10)
c2 = Star 55 and 57 together would correspond to MDS-67 (MTT-36)
c3 = Multiple detections. MDS-58 and 62 correspond to MTT-15
c4 = MDS-8 and 9 correspond to MTT-21
c5 = MDS-49, 50, 52, and 53 correspond to D
c6 = MDS-68 and 69 correspond to MTT-44
c7 = MDS-10 and 11 correspond to MTT-22
c8 = MDS-12 and 13 correspond to MTT-30
c9 = A1, A2, and A3 together consist of a X-ray source within the
match of smoothed PSF in Moffat et al. (2002ApJ...573..191M 2002ApJ...573..191M)
c10 = MDS-49 and 50 together consist of a X-ray source
Note (7): Designated IDs of potential counterparts in a mid-infrared
detections by Nurnberger & Stanke (2003A&A...400..223N 2003A&A...400..223N, [NS2003] NNA
in Simbad). The 11.9 micron sources 6A-F are in the concentrated
cluster core.
Note (8): Notes as follows:
d1 = Star 19, 33 and 51 together would correspond to 6G
d2 = Star 18 and 43 together would correspond to 6K
d3 = Star 17 and 22 together would correspond to 6N
Note (9): IDs in Sung & Bessell (2004, Cat. J/AJ/127/1014, [SB2004] NNNNN
in Simbad) (Tab. 2 therein). Sources brighter than V=14mag detected in
their analysis of the HST/PC1 archival data set.
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History:
* 20-Sep-2010: From electronic version of the journal
* 14-Mar-2011: Coordinates of the center corrected in Note (1) above,
from author
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Jul-2010