J/MNRAS/443/2907 3D extinction map of northern Galactic plane (Sale+, 2014)
A 3D extinction map of the northern Galactic plane based on IPHAS photometry.
Sale S.E., Drew J.E., Barentsen G., Farnhill H.J., Raddi R., Barlow M.J,
Eisloffel J., Vink J.S., Rodriguez-Gil P., Wright N.J.
<Mon. Not. R. Astron. Soc. 443, 2907 (2014)>
=2014MNRAS.443.2907S 2014MNRAS.443.2907S
ADC_Keywords: Extinction ; Galactic plane ; Interstellar medium ;
Stars, fundamental
Keywords: surveys - stars: fundamental parameters - dust, extinction -
ISM: structure
Description:
We present a three dimensional map of extinction in the Northern
Galactic Plane derived using photometry from the IPHAS survey. We
construct the map using a method based on a hierarchical Bayesian
model as previously described by Sale (2012MNRAS.427.2119S 2012MNRAS.427.2119S). In
addition to mean extinction, we also measure differential extinction,
which arises from the fractal nature of the ISM. The method applied
also furnishes us with photometric estimates of the distance,
extinction, effective temperature, surface gravity, and mass for
∼38 million stars.
Further details about the data as well as additional formats and data
products are available via http://www.iphas.org/extinction.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
acat.dat 120 38092694 The catalogue of stellar parameters
amap.dat 6050 61130 The 3D extinction map
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See also:
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)
J/A+A/372/276 : Polarization catalogue for NGP area (Berdyugin+, 2001)
Byte-by-byte Description of file: acat.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [IPHAS2]
8- 26 A19 --- IPHAS2 Source Name (JHHMMSS.ss+DDMMSS.s)
29- 36 F8.4 deg GLON [0/360] Galactic longitude
38- 44 F7.4 deg GLAT [-5/5] Galactic latitude
46- 53 F8.2 pc Dist [1/28900]?=- Estimated distance
55- 61 F7.2 pc e_Dist [0.3/8000]?=- Uncertainty on distance
63- 68 F6.3 mag A [0/24]?=- Estimated extinction (1)
71- 75 F5.3 mag e_A [0/2.8]?=- Uncertainty on extinction (1)
79- 84 F6.4 [K] logT [3.5/4.5]?=- Estimated effective temperature
86- 91 F6.4 [K] e_logT ?=- Uncertainty on effective temperature
93- 98 F6.4 [cm/s2] logg [0.6/5.4]?=- Estimated surface gravity
100-105 F6.4 [cm/s2] e_logg ?=- Uncertainty on surface gravity
107-113 F7.4 Msun M [0.1/12]?=- Estimated stellar mass
115-120 F6.4 Msun e_M ?=- Uncertainty on stellar mass
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Note (1): Expressed in terms of A0, the monochromatic extinction at 5495Å.
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Byte-by-byte Description of file: amap.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 deg GLON Galactic longitude at centre of voxel
9- 14 F6.3 deg GLAT [-5/5] Galactic latitude at centre of voxel
16- 22 F7.3 deg lmin Minimum Galactic longitude of voxel
24- 30 F7.3 deg lmax Maximum Galactic longitude of voxel
32- 37 F6.3 deg bmin Minimum Galactic latitude of voxel
39- 44 F6.3 deg bmax Maximum Galactic latitude of voxel
46- 50 I5 pc trust [2849/11135] Maximum reliable distance (1)
52-6051 150A40 --- Blocks Blocks of data (2)
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Note (1): The greatest distance at which the data dominates the posterior.
Note (2): Each block of data contains:
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A10 meanA Mean extinction on Dist
A10 diffA Differential extinction on Dist
A10 e_meanA Uncertainty on mean extinction on Dist
A10 e_diffA Uncertainty on diff extinction on Dist
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For Dist from 0.05kpc to 14.95kpc with a step of 0.1kpc by block
All these values are expressed in terms of A0, the monochromatic
extinction at 5495Å.
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Acknowledgements:
Stuart Sale, Stuart.Sale(at)physics.ox.ac.uk
References:
Sale, 2012MNRAS.427.2119S 2012MNRAS.427.2119S,
3D extinction mapping using hierarchical Bayesian models
(End) Stuart Sale [Univ. of Oxford, UK], Patricia Vannier [CDS] 04-Jun-2014