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J/ApJS/89/189 IRAS PSC new OH/IR stars. III. (Chengalur+ 1993)
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New OH/IR stars from color-selected IRAS sources. III. A complete survey
Chengalur J.N., Lewis B.M., Eder J., Terzian Y.
<Astrophys. J. Suppl. Ser. 89, 189 (1993)>
=1993ApJS...89..189C (SIMBAD/NED BibCode)
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ADC_Keywords: Infrared sources ; Radio lines
Keywords: infrared: stars - radio lines: stars - stars: AGB and post-AGB -
surveys
Abstract:
We present the results of 1612MHz observations conducted at the
Arecibo Observatory of 571 color-selected sources from the IRAS Point
Source Catalog. Of these sources we detect 132, 113 for the first
time. This is the third part of an Arecibo survey of color-selected
IRAS sources. The earlier two parts together detected a total of 268
sources of 1612MHz emission.
An analysis of the properties of the OH/IR stars detected in all three
parts of the survey is included. In particular we compute the limiting
1612MHz peak flux of the entire survey to be ~40mJy.
The correlation between the IRAS infrared fluxes and the 1612MHz flux
of the 132 sources detected in part III of the survey is smaller than
that found in the earlier parts of the survey. This is to be expected
from the intrinsic variability of OH/IR stars and the longer time gap
between the 1612MHz observations and the IRAS measurements.
We identify a subset of 54 stars as being near the tangent point of
the galactic rotation curve. Using the kinematical distances to these
stars we find that the efficiency of momentum transfer varies
exponentially with the (25-12){mu}m color, consistent with the stellar
outflow being driven by radiation pressure. Further the IR pump
efficiency increases with increasing optical depth of the
circumstellar shell, as expected for radiative pumping.
The bolometric luminosity function is found to decrease sharply above
L_Bol_=5600L_{sun}_, and the 1612MHz luminosity function shows a
corresponding falloff above L_1612_=1.8x10^-8^L_{sun}_. We also find
direct confirmation of the expectation that sources with large
expansion velocity are more luminous than sources with small expansion
velocity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 125 132 Detections
table2 41 439 Non-detections
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See also:
II/125 : IRAS Point Source Catalogue, Version 2.0 (IPAC 1986)
J/A+AS/90/327 : IRAS Point Source 1612MHz OH survey (te Lintel Hekkert+ 1991)
Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS name
11 A1 --- m_IRAS Multiplicity index on IRAS name
12 A1 --- n_IRAS [*] Note on IRAS name (1)
14- 18 F5.1 deg GLON Galactic longitude
20- 24 F5.1 deg GLAT Galactic latitude
26- 27 I2 h RAh Right ascension (1950)
28- 29 I2 min RAm Right ascension (1950)
30- 33 F4.1 s RAs Right ascension (1950)
34 A1 --- DE- Declination sign
35- 36 I2 deg DEd Declination (1950)
37- 38 I2 arcmin DEm Declination (1950)
39- 40 I2 arcsec DEs Declination (1950)
42- 49 F8.1 mJy.km/s S1612MHz Total integrated 1612MHz flux
51- 58 F8.1 mJy.km/s S1612-l Integrated 1612MHz flux in the low-velocity
half of the spectrum
60- 67 F8.1 mJy.km/s S1612-h ? Integrated 1612MHz flux in the high-velocity
half of the spectrum
69- 72 F4.1 km/s DV(100) ? Velocity separation between the half-power
points of the two peaks in the line profile
{DELTA}V_100_
74- 77 F4.1 km/s DV(50) ? Velocity separation between the half-power
points of the two peaks in the line profile
{DELTA}V_50_
78 A1 --- u_DV(50) [)] Uncertainty flag on DV(50).
79- 84 F6.1 km/s Vl LSR velocity of the low-velocity peak
86- 90 F5.1 km/s Vh ? LSR velocity of the high-velocity peak
92- 97 F6.1 km/s <V> Systemic LSR velocity
99-105 F7.4 mag (25-12) ? (25-12){mu}m infrared color
107-113 F7.4 mag (60-25) ? (60-25){mu}m infrared color
115-129 A15 --- Name Other name, if the source corresponds to one
known before the IRAS survey
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Note (1): *: OH source not listed in the compilation by
te Lintel Hekkert et al., 1989A&AS...78..399T
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS name
12- 16 F5.1 deg GLON Galactic longitude
18- 22 F5.1 deg GLAT Galactic latitude
24- 30 F7.4 mag (12-25) (12-25){mu}m infrared color
32- 38 F7.4 mag (60-25) (60-25){mu}m infrared color
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History: Prepared via OCR at CDS.
References:
Eder J. et al., Paper I, =1988ApJS...66..183E
Lewis et al., Paper II, =1990ApJ...362..634
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(End) James Marcout, Patricia Bauer [CDS] 28-Nov-1996