J/MNRAS/394/1875 IR colours of MASH planetary nebulae (Phillips+, 2009)
The near- and far-infrared colours of MASH planetary nebulae.
Phillips J.P., Zepeda-Garcia D.
<Mon. Not. R. Astron. Soc., 394, 1875-1886 (2009)>
=2009MNRAS.394.1875P 2009MNRAS.394.1875P
ADC_Keywords: Planetary nebulae ; Infrared sources ; Photometry, infrared
Keywords: ISM: jets and outflows - planetary nebulae: general - infrared: ISM
Abstract:
We have analysed the near-infrared (NIR) and far-infrared (FIR)
colours of MASH I and MASH II (the Macquarie/AAO/Strasbourg surveys,
Cat. V/127) planetary nebulae (PNe), using data deriving from the
Two-Micron All-Sky Survey and Infrared Astronomical Satellite. We were
able to identify ∼5 per cent of the sources in the NIR, and a slightly
larger fraction (∼12 per cent) in the FIR. It is concluded that whilst
the NIR colours of these nebulae are consistent with those of less
evolved (and higher surface brightness) PNe, their FIR colours are
markedly different. This disparity is likely to arise as a result of
an evolution in dust temperatures, in their line emission
characteristics, and in the relative contributions of the 8.6 and
11.3um polycyclic aromatic hydrocarbon emission features. A rump of∼9
per cent of the detected sources have values log[F(25um)/F(60um)]
which are lower than can be explained in terms of normal nebular
evolution, however. If these are comparable in nature to the
undetected PNe, then this would argue that ∼1 in 10 of MASH I and II
nebulae may represent galactic H ii regions, Stromgren spheres,
symbiotic nebulae or other unrelated categories of source.
Description:
We have investigated the fluxes of IRAS and 2MASS sources lying close
to the MASH I and MASH II sources. This has involved correlating the
positions of the MASH PNe with sources within 2MASS and IRAS
point-source catalogues (PSCs). No identifications were found within
the 2MASS extended source catalogue.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 150 IRAS photometry for MASH I and MASH II sources
table2.dat 97 60 2MASS photometry of MASH I and MASH II sources
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See also:
V/127 : MASH Catalogues of Planetary Nebulae (Parker+ 2006-2008)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [PN]
4- 15 A12 --- PNG PNG name (Gddd.d+dd.da)
17- 27 A11 --- IRAS IRAS name (HHMMm+DDMMA)
29- 32 A4 --- MASH MASH catalogue in which the sources appear (G1)
34- 45 A12 --- Name Nebular name
47 A1 --- TLP [TLP] PN status (G2)
49- 54 F6.2 Jy F12 Flux at 12um
56- 61 F6.2 Jy F25 Flux at 25um
63- 68 F6.2 Jy F60 Flux at 60um
70- 75 F6.2 Jy F100 Flux at 100um
77- 80 I4 --- Qual Quality flag in the 4 IRAS filters (3)
82- 85 F4.1 arcsec Sep Separation between the MASH and IR source
position
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Note (3): Reliability of the fluxes, where:
1 = upper limit
2 = moderate quality
3 = hight quality
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- --- [PN]
4- 15 A12 --- PNG PNG name (Gddd.d+dd.da)
17- 32 A16 --- 2MASS 2MASS name (HHMMSSss+DDMMSSs)
35- 38 A4 --- MASH MASH catalogue in which the sources appear (G1)
40- 51 A12 --- Name Nebular name
53 A1 --- TLP [TLP] PN status (G2)
55- 58 F4.1 arcsec theta Harmonic mean size (3)
60- 64 F5.2 mag Jmag 2MASS J magnitude
66- 70 F5.3 mag e_Jmag rms uncertainty on Jmag
72- 76 F5.2 mag Hmag 2MASS H magnitude
78- 81 F4.2 mag e_Hmag rms uncertainty on Hmag
83- 87 F5.2 mag Ksmag 2MASS Ks magnitude
89- 93 F5.3 mag e_Ksmag rms uncertainty on Ksmag
94- 97 F4.1 arcsec Sep Separation between the MASH and 2MASS source
position
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Note (3): Harmonic mean size, θHARM=(θMax*θMin)0.5,
where θMax and θMin are the maximum and minimum source
sizes given in the MASH I and II catalogues
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Global notes:
Note (G1): MASH catalogue as follows:
M I = Parker et al. 2006, Cat. V/127
M II = Miszalski et al. 2008, Cat. V/127
Note (G2): Flag of reliabilities of the PN:
P = possible PN;
L = likely PN;
T = true PN
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History:
* 26-Oct-2009: From electronic version of the journal
* 16-Nov-2009: 2MASS name corrected in table2 for PN G021.3+02.2;
many other 2MASS names are not either the recommended 'truncated'
J2000 position.
* 15-Jun-2010: 3 2MASS names and 1 Name corrected in table2
- the names corrected are:
09572645-5357743 replaced by 09572645-5357074
18421140-0050317 replaced by 18421140+0050317
11281287-6121302 replaced by 11281287-6121030
- PHR1758-2756 replaced by PPA1757-2750
(End) Patricia Vannier [CDS] 01-Sep-2009