J/A+A/566/A120 3D dust extinction in Milky Way bulge (Schultheis+, 2014)
Mapping the Milky Way bulge in bin high resolution:
the 3D dust extinction, CO, and X factor maps.
Schultheis M., Chen B.Q., Jiang B.W., Gonzalez O.A., Enokiya R., Fukui Y.,
Torii K., Rejkuba M., Minniti D.
<Astron. Astrophys. 566, A120 (2014)>
=2014A&A...566A.120S 2014A&A...566A.120S
ADC_Keywords: Interstellar medium ; Stars, giant ; Models
Keywords: Galaxy: bulge - dust, extinction - Galaxy: stellar content
Abstract:
Three dimensional interstellar extinction maps provide a powerful tool
for stellar population analysis. However, until now, these 3D maps
were rather limited by sensitivity and spatial resolution. We use data
from the VISTA Variables in the Via Lactea survey together with the
Besancon stellar population synthesis model of the Galaxy to determine
interstellar extinction as a function of distance in the Galactic
bulge covering -10<l<10 and -10<b<5. We adopted a recently developed
method to calculate the colour excess. First we constructed the H-Ks
vs. Ks and J-Ks vs. Ks colour-magnitude diagrams based on the VVV
catalogues that matched 2MASS. Then, based on the temperature-colour
relation for M giants and the distance-colour relations, we derived
the extinction as a function of distance. The observed colours were
shifted to match the intrinsic colours in the Besancon model as a
function of distance iteratively. This created an extinction map with
three dimensions: two spatial and one distance dimension along each
line of sight towards the bulge. We present a 3D extinction map that
covers the whole VVV area with a resolution of 6'x6', for J-Ks and
H-Ks using distance bins of 0.5-1.0kpc. The high resolution and depth of
the photometry allows us to derive extinction maps for a range of
distances up to 10kpc and up to 30 magnitudes of extinction in AV
(3.0mag in AKs). Integrated maps show the same dust features and
consistent values as other 2D maps.
We discuss the spatial distribution of dust features in the line of
sight, which suggests that there is much material in front of the
Galactic bar, specifically between 5-7kpc. We compare our dust
extinction map with the high-resolution 12CO maps (NANTEN2) towards
the Galactic bulge, where we find a good correlation between 12CO
and AV. We determine the X factor by combining the CO map and our
dust extinction map. Our derived average value
X=2.5±0.47x1020/(cm2.K.km/s) is consistent with the canonical
value of the Milky Way. The X-factor decreases with increasing
extinction.
Description:
Interstellar extinction Aks values as a function of galactic
longitude, latitude in 500pc distance bins with the associated errors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1jk.dat 351 30200 3D Interstellar extinction as a function of
distance and E(J-K)
table1hk.dat 351 30200 3D Interstellar extinction as a function of
distance and E(H-K)
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See also:
J/A+A/349/L69 : Interstellar extinction (Schultheis+, 1999)
J/A+A/453/635 : Modelling the Galactic Interstellar Extinction
(Marshall+, 2006)
J/A+A/495/157 : Interstellar extinction in Galactic Center (Schultheis+, 2009)
J/A+A/550/A42 : Extinction map towards the Galactic bulge (Chen+, 2013)
Byte-by-byte Description of file: table1jk.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 deg GLON [-10/9.9] Galactic longitude
9- 15 F7.3 deg GLAT [-10/5] Galactic latitude
19- 23 F5.3 mag E(J-K)00 E(J-K) in bin 0.0-0.5kpc
26- 31 F6.3 mag E(J-K)05 E(J-K) in bin 0.5-1.0kpc
33- 39 F7.3 mag E(J-K)10 E(J-K) in bin 1.0-1.5kpc
41- 47 F7.3 mag E(J-K)15 E(J-K) in bin 1.5-2.0kpc
49- 55 F7.3 mag E(J-K)20 E(J-K) in bin 2.0-2.5kpc
57- 63 F7.3 mag E(J-K)25 E(J-K) in bin 2.5-3.0kpc
65- 71 F7.3 mag E(J-K)30 E(J-K) in bin 3.0-3.5kpc
73- 79 F7.3 mag E(J-K)35 E(J-K) in bin 3.5-4.0kpc
81- 87 F7.3 mag E(J-K)40 E(J-K) in bin 4.0-4.5kpc
89- 95 F7.3 mag E(J-K)45 E(J-K) in bin 4.5-5.0kpc
97-103 F7.3 mag E(J-K)50 E(J-K) in bin 5.0-5.5kpc
105-111 F7.3 mag E(J-K)55 E(J-K) in bin 5.5-6.0kpc
113-119 F7.3 mag E(J-K)60 E(J-K) in bin 6.0-6.5kpc
121-127 F7.3 mag E(J-K)65 E(J-K) in bin 6.5-7.0kpc
129-135 F7.3 mag E(J-K)70 E(J-K) in bin 7.0-7.5kpc
137-143 F7.3 mag E(J-K)75 E(J-K) in bin 7.5-8.0kpc
145-151 F7.3 mag E(J-K)80 E(J-K) in bin 8.0-8.5kpc
153-159 F7.3 mag E(J-K)85 E(J-K) in bin 8.5-9.0kpc
161-167 F7.3 mag E(J-K)90 E(J-K) in bin 9.0-9.5kpc
169-175 F7.3 mag E(J-K)95 E(J-K) in bin 9.5-10.0kpc
177-183 F7.3 mag E(J-K)100 E(J-K) in bin 10.0-10.5kpc
187-191 F5.3 mag e_E(J-K)00 Error on E(J-K) in bin 0.0-0.5kpc
194-199 F6.3 mag e_E(J-K)05 Error on E(J-K) in bin 0.5-1.0kpc
201-207 F7.3 mag e_E(J-K)10 Error on E(J-K) in bin 1.0-1.5kpc
209-215 F7.3 mag e_E(J-K)15 Error on E(J-K) in bin 1.5-2.0kpc
217-223 F7.3 mag e_E(J-K)20 Error on E(J-K) in bin 2.0-2.5kpc
225-231 F7.3 mag e_E(J-K)25 Error on E(J-K) in bin 2.5-3.0kpc
233-239 F7.3 mag e_E(J-K)30 Error on E(J-K) in bin 3.0-3.5kpc
241-247 F7.3 mag e_E(J-K)35 Error on E(J-K) in bin 3.5-4.0kpc
249-255 F7.3 mag e_E(J-K)40 Error on E(J-K) in bin 4.0-4.5kpc
257-263 F7.3 mag e_E(J-K)45 Error on E(J-K) in bin 4.5-5.0kpc
265-271 F7.3 mag e_E(J-K)50 Error on E(J-K) in bin 5.0-5.5kpc
273-279 F7.3 mag e_E(J-K)55 Error on E(J-K) in bin 5.5-6.0kpc
281-287 F7.3 mag e_E(J-K)60 Error on E(J-K) in bin 6.0-6.5kpc
289-295 F7.3 mag e_E(J-K)65 Error on E(J-K) in bin 6.5-7.0kpc
297-303 F7.3 mag e_E(J-K)70 Error on E(J-K) in bin 7.0-7.5kpc
305-311 F7.3 mag e_E(J-K)75 Error on E(J-K) in bin 7.5-8.0kpc
313-319 F7.3 mag e_E(J-K)80 Error on E(J-K) in bin 8.0-8.5kpc
321-327 F7.3 mag e_E(J-K)85 Error on E(J-K) in bin 8.5-9.0kpc
329-335 F7.3 mag e_E(J-K)90 Error on E(J-K) in bin 9.0-9.5kpc
337-343 F7.3 mag e_E(J-K)95 Error on E(J-K) in bin 9.5-10.0kpc
345-351 F7.3 mag e_E(J-K)100 Error on E(J-K) in bin 10.0-10.5kpc
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Byte-by-byte Description of file: table1hk.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 deg GLON [-10/9.9] Galactic longitude
9- 15 F7.3 deg GLAT [-10/5] Galactic latitude
19- 23 F5.3 mag E(H-K)00 E(H-K) in bin 0.0-0.5kpc
26- 31 F6.3 mag E(H-K)05 E(H-K) in bin 0.5-1.0kpc
34- 39 F6.3 mag E(H-K)10 E(H-K) in bin 1.0-1.5kpc
42- 47 F6.3 mag E(H-K)15 E(H-K) in bin 1.5-2.0kpc
50- 55 F6.3 mag E(H-K)20 E(H-K) in bin 2.0-2.5kpc
58- 63 F6.3 mag E(H-K)25 E(H-K) in bin 2.5-3.0kpc
66- 71 F6.3 mag E(H-K)30 E(H-K) in bin 3.0-3.5kpc
74- 79 F6.3 mag E(H-K)35 E(H-K) in bin 3.5-4.0kpc
82- 87 F6.3 mag E(H-K)40 E(H-K) in bin 4.0-4.5kpc
90- 95 F6.3 mag E(H-K)45 E(H-K) in bin 4.5-5.0kpc
98-103 F6.3 mag E(H-K)50 E(H-K) in bin 5.0-5.5kpc
106-111 F6.3 mag E(H-K)55 E(H-K) in bin 5.5-6.0kpc
114-119 F6.3 mag E(H-K)60 E(H-K) in bin 6.0-6.5kpc
122-127 F6.3 mag E(H-K)65 E(H-K) in bin 6.5-7.0kpc
130-135 F6.3 mag E(H-K)70 E(H-K) in bin 7.0-7.5kpc
138-143 F6.3 mag E(H-K)75 E(H-K) in bin 7.5-8.0kpc
146-151 F6.3 mag E(H-K)80 E(H-K) in bin 8.0-8.5kpc
154-159 F6.3 mag E(H-K)85 E(H-K) in bin 8.5-9.0kpc
162-167 F6.3 mag E(H-K)90 E(H-K) in bin 9.0-9.5kpc
170-175 F6.3 mag E(H-K)95 E(H-K) in bin 9.5-10.0kpc
178-183 F6.3 mag E(H-K)100 E(H-K) in bin 10.0-10.5kpc
187-191 F5.3 mag e_E(H-K)00 Error on E(H-K) in bin 0.0-0.5kpc
194-199 F6.3 mag e_E(H-K)05 Error on E(H-K) in bin 0.5-1.0kpc
202-207 F6.3 mag e_E(H-K)10 Error on E(H-K) in bin 1.0-1.5kpc
210-215 F6.3 mag e_E(H-K)15 Error on E(H-K) in bin 1.5-2.0kpc
218-223 F6.3 mag e_E(H-K)20 Error on E(H-K) in bin 2.0-2.5kpc
226-231 F6.3 mag e_E(H-K)25 Error on E(H-K) in bin 2.5-3.0kpc
234-239 F6.3 mag e_E(H-K)30 Error on E(H-K) in bin 3.0-3.5kpc
242-247 F6.3 mag e_E(H-K)35 Error on E(H-K) in bin 3.5-4.0kpc
250-255 F6.3 mag e_E(H-K)40 Error on E(H-K) in bin 4.0-4.5kpc
258-263 F6.3 mag e_E(H-K)45 Error on E(H-K) in bin 4.5-5.0kpc
266-271 F6.3 mag e_E(H-K)50 Error on E(H-K) in bin 5.0-5.5kpc
274-279 F6.3 mag e_E(H-K)55 Error on E(H-K) in bin 5.5-6.0kpc
282-287 F6.3 mag e_E(H-K)60 Error on E(H-K) in bin 6.0-6.5kpc
290-295 F6.3 mag e_E(H-K)65 Error on E(H-K) in bin 6.5-7.0kpc
298-303 F6.3 mag e_E(H-K)70 Error on E(H-K) in bin 7.0-7.5kpc
306-311 F6.3 mag e_E(H-K)75 Error on E(H-K) in bin 7.5-8.0kpc
314-319 F6.3 mag e_E(H-K)80 Error on E(H-K) in bin 8.0-8.5kpc
322-327 F6.3 mag e_E(H-K)85 Error on E(H-K) in bin 8.5-9.0kpc
330-335 F6.3 mag e_E(H-K)90 Error on E(H-K) in bin 9.0-9.5kpc
338-343 F6.3 mag e_E(H-K)95 Error on E(H-K) in bin 9.5-10.0kpc
346-351 F6.3 mag e_E(H-K)100 Error on E(H-K) in bin 10.0-10.5kpc
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Acknowledgements:
Mathias Schultheis, mathias.schultheis(at)oca.eu
(End) Patricia Vannier [CDS] 23-Jun-2014