J/PASJ/53/293 IRAS/SiO sources toward Galactic Bulge (Deguchi+, 2001)
Near-IR observations of IRAS sources with SiO masers at the inner Galactic Bulge
Deguchi S., Fujii T., Matsumoto S., Nakashima J., Wood P.R.
<Publ. Astron. Soc. Jap., 53, 293 (2001)>
=2001PASJ...53..293D 2001PASJ...53..293D
ADC_Keywords: Infrared sources ; Photometry, infrared ; Masers
Keywords: Galaxy: bulge - infrared: sources - stars: kinematics -
stars: long-period variables - stars: mass loss
Abstract:
Near-infrared photometric observations in the J-, H-, and K-bands
have been made for 86 IRAS sources toward the inner Galactic bulge
(|l|<3° and |b|<3°). SiO maser emission has previously
been detected in all of these sources; they are well-confirmed,
mass-losing, late-type stars having accurate radial velocities
derived from SiO observations. For 78 sources, single, unambiguous
near-infrared counterparts were found within the errors of the IRAS
positions; for the other 8 sources, multiple candidates, candidates
with a low confidence level, or candidates overlapped with other
stars were found. From the J-, H-, K-band and IRAS 12 and 25µm
intensities, we estimated the spectral energy distributions of the
sources, and obtained the distances, assuming a constant luminosity.
The derived distances of the IRAS/SiO sources are consistent with the
current bar model of the Galactic bulge, where the near side of the
bar is located in the first quadrant of the galactic longitude. We
also reanalyzed the radial velocity shift with distance, and confirmed
the presence of streaming motions of stars in the bar-like bulge.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 79 78 Observed magnitudes and positions of the IRAS
candidates
table2.dat 79 11 Ambiguous, multiple, and overlapped candidates
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See also:
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
V/68 : Stellar Maser Observations (Benson+ 1990)
J/ApJS/106/463 : SiO maser sources (Jiang+ 1996)
J/A+AS/132/211 : SiO masers (Harju+ 1998)
J/A+AS/127/185 : SiO masers in OH/IR stars, proto-PN and PN (Nyman+ 1998)
J/PASJ/54/719 : IRAS/SiO sources in the Galactic bulge (Deguchi+ 2002)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS name
12- 21 A10 "YYYY/MM/DD" Date Observation date
23 A1 --- Cand ? Candidate number, only in table2
25- 30 F6.3 mag Jmag ? J magnitude
32- 37 F6.3 mag Hmag ? H magnitude
39 A1 --- l_Kmag Limit flag on Kmag
40- 45 F6.3 mag Kmag ? K magnitude
46 A1 --- n_Kmag [N] N: The K-band imaging failed (no value)
47- 51 F5.1 arcsec DX Difference from the IRAS position in RA (1)
53- 57 F5.1 arcsec DY Difference from the IRAS position in DE (1)
59- 74 A16 --- MSX Name of the nearest MSX source (Cat. V/114)
75 A1 --- n_MSX [*] if no MSX source was found within 40"
76- 79 F4.1 arcsec DR ? Position difference between the identified
source and the MSX source
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Note (1): The difference in the position in right ascension and declination
(DX and DY) from the IRAS PSC position is expressed on the plane
of the sky; the coordinates of an object are given by
RA = RA(IRAS PSC position) + DX("),
DE = DE(IRAS PSC position) + DY("),
at the epoch of 1950 (the signs of DX and DY are taken oppositely
from those of Deguchi et al., 1998PASJ...50..597D 1998PASJ...50..597D).
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2002