J/PASJ/59/559 SiO maser search off the Galactic plane (Deguchi+, 2007)
An SiO maser search off the galactic plane.
Deguchi S., Fujii T., Ita Y., Imai H., Izumiura H., Kameya O.,
Matsunaga N., Miyazaki A., Mizutani A., Nakada Y., Nakashima J.-I.,
Winnberg A.
<Publ. Astron. Soc. Jap., 59, 559-587 (2007)>
=2007PASJ...59..559D 2007PASJ...59..559D
ADC_Keywords: Masers ; Infrared sources ; Photometry, infrared
Keywords: Galaxy: halo, kinematics and dynamics - masers -
stars: AGB and post-AGB
Abstract:
We searched for the SiO J=1-0, v=1 and 2 maser lines at ∼43GHz in 277
2MASS/MSX/IRAS sources off the Galactic plane (|b|≳3°), which
resulted in 119 (112 new) detections. Among the new detections, two
are very faint objects with MSX 12µm flux densities below 2Jy.
These are likely to be O-rich AGB-stars associated with dwarf-galaxy
tidal tails. The sample also includes medium bright MSX objects at
moderately high galactic latitudes (3°<|b|<5°) and in the
IRAS gap at higher latitudes. A signature of a warp of the inner
Galactic disk is found for a disk subsample. This warp appears
relatively strongly in the area of 0°<l<45° and
3°<|b|<5°. We also found a group of stars that does not follow
to the Galactic rotation. This feature appears in the Galactic disk at
l∼27°, and extends more than 15° in the galactic latitude,
like a stream of tidal debris from a dwarf galaxy.
Description:
Simultaneous observations in the SiO J=1-0, v=1 and 2 transitions
at 42.122 and 42.821GHz respectively were made with the 45-m radio
telescope at Nobeyama, mainly during the winter-spring seasons between
2003-2006; in addition, a few unpublished results from 1999 and 2000
were included in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 118 SiO detections
table2.dat 94 160 Negative results
table3.dat 149 278 Infrared properties of the observed sources
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See also:
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs)
18 A1 --- n_2MASS [*±S] Previous detections (1)
20- 25 F6.1 km/s Vp1 ?=- Peak velocity for (J=1-0, v=1, 42.122GHz)
27- 31 F5.3 K Tp1 ?=- Peak temperature for (J=1-0, v=1)
33- 38 F6.3 K.km/s F1 ?=- Flux for SiO (J=1-0, v=1)
40- 44 F5.3 K e_Tp1 RMS value for SiO (J=1-0, v=1)
46- 51 F6.1 km/s Vp2 ?=- Peak velocity for (J=1-0, v=2, 42.821GHz)
53- 58 F6.3 K Tp2 ?=- Peak temperature for SiO (J=1-0, v=2)
60- 65 F6.3 K.km/s F2 ?=- Flux for SiO (J=1-0, v=2)
67- 71 F5.3 K e_Tp2 RMS value for SiO (J=1-0, v=2)
73- 84 A12 --- Date Observation date, in YYYY/MM/DD.d unit
86- 91 F6.1 km/s Vave Average velocity
93-102 A10 --- IRAS IRAS name (HHMMm+DDMM)
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Note (1): Note as follows:
* = Detected previously by Jiang et al., 1996, Cat. J/ApJS/106/463
+ = Detected previously by Nyman, Hall, and Olofsson, 1998,
Cat. J/A+AS/127/185
- = The SiO J=2-1, v=1 emission detected previously by Deguchi,
Nakashima, and Balasubramanyam (2001PASJ...53..305D 2001PASJ...53..305D).
S = Detected previously by Ita et al., 2001A&A...376..112I 2001A&A...376..112I
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs)
19- 23 F5.3 K eTp1 RMS value for SiO (J=1-0, v=1, 42.122GHz))
25- 29 F5.3 K eTp2 RMS value for SiO (J=1-0, v=2, 42.821GHz)
31- 42 A12 --- Date Observation date in YYYY/MM/DD. unit
44- 53 A10 --- IRAS IRAS name (HHMMm+DDMM)
55- 94 A40 --- Com Comments
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs)
18 A1 --- n_2MASS [+] +: No 2MASS object, but the IRAS
position is shown
20- 25 F6.3 mag Kmag ? 2MASS K magnitude
27- 31 F5.3 mag J-H ? 2MASS J-H colour index
33- 37 F5.3 mag H-K ? 2MASS H-K colour index
39- 41 I3 --- Bflag ? Blending flag (1)
43- 59 A17 --- MSX MSX 6C name
61- 63 F3.1 arcsec drM ? Position difference between
2MASS and MSX sources
65- 71 F7.3 Jy FC ? MSX C-band (12um) flux density
72 A1 --- n_FC [*] * when FC conatins the IRAS 12um flux
74- 79 F6.3 --- C(AC) ? Flux density ratio log(FC/FA),
where FA is MSX flux density at 8um
81- 86 F6.3 --- C(CE) ? Flux density ratio log(FE/FC),
where FE is MSX flux density at 21um
87 A1 --- n_C(CE) [*] * when C(CE) = log(Firas25/Firas12)
89- 99 A11 --- IRAS IRAS name (HHMMm+DDMMA)
100-103 F4.1 arcsec drI ? Position difference between
IRAS and 2MASS sources
105-149 A45 --- Com Comments
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Note (1): Blend flag. Three character flag, one character per band [JHK],
that indicates the number of components that were fit simultaneously
when estimating the brightness of a source:
0 = Source is not detected, or is inconsistently deblended in that band.
1 = One component was fit to the source in R2 profile-fitting
photometry (Rflg="2"), or default magnitudes are from aperture
photometry (Rflg="1" or "4") or saturated star 1-d radial
profile-fitting (Rflg="3").
>1 = More than one component was fit simultaneously during R2
profile-fit photometry, where the value of the field is the
number of components simultaneously fit. The maximum number of
components is 7 in any band for the PSC, so this Bflg is always
a three character flag. Multi-component fitting occurs only for
profile-fitting, and only when more than one detection is found
within ∼5". Single detections that are not well-fit by a single
PSF are not split.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2008