2013A&A...550A..35P


Query : 2013A&A...550A..35P

2013A&A...550A..35P - Astronomy and Astrophysics, volume 550A, 35-35 (2013/2-1)

Dust properties in the Galactic bulge.

POTTASCH S.R. and BERNARD-SALAS J.

Abstract (from CDS):

It has been suggested that the ratio of total-to-selective extinction RV in dust in the interstellar medium differs in the Galactic bulge from its value in the local neighborhood. We attempt to test this suggestion. The mid-infrared hydrogen lines in 16 Galactic bulge PNe measured by the Spitzer Space Telescope are used to determine the extinction corrected Hβ flux. This is compared to the observed Hβ flux to obtain the total extinction at Hβ. The selective extinction is obtained from the observed Balmer decrement in these nebulae. The value of RV can then be found. The ratio of total-to-selective extinction in the Galactic bulge is consistent with the value RV=3.1, which is the same as has been found in the local neighborhood. The suggestion that RV is different in the Galactic bulge is incorrect. The reasons for this are discussed.

Abstract Copyright:

Journal keyword(s): dust, extinction - planetary nebulae: general - infrared: ISM - radio continuum: ISM

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PN M 2-5 PN 17 02 19.0885293528 -33 10 04.843181568   16.28 15.08   14.44 ~ 68 0
2 PN M 2-10 PN 17 14 07.0266004296 -31 19 42.983628132     15.00     ~ 81 0
3 PN H 1-15 PN 17 28 37.6286372256 -24 51 07.218909000     15.10     ~ 59 0
4 PN H 2-11 PN 17 29 25.9611478512 -25 49 07.205229768           ~ 63 0
5 PN H 1-20 PN 17 30 43.8092470056 -28 04 06.841201728   17.1 16.0     ~ 81 0
6 PN M 4-5 PN 17 34 54.72 -26 35 57.3     17.50     ~ 68 0
7 PN SaSt 2-15 PN 17 38 57.3713723952 -18 17 35.788016724   13.93 13.66 13.82   ~ 74 0
8 WRAY 17-94 PN 17 40 12.84 -26 44 21.9     16.00     ~ 57 1
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13888 0
10 PN H 2-20 PN 17 45 39.81 -25 40 00.3     17.00     ~ 75 1
11 PN M 1-27 WR? 17 46 45.4755803568 -33 08 35.133711936     13.90     [WC11]? 100 0
12 PN M 3-44 PN 17 51 18.9230505792 -30 23 53.176813980     16.50     [WC11] 81 0
13 PN H 1-43 PN 17 58 14.4398681232 -33 47 37.621641912     15.10     [WC11] 79 0
14 PN M 1-37 PN 18 05 25.8092901000 -28 22 04.282489956     14.70     [WC11]? 127 0
15 PN M 1-38 PN 18 06 05.74 -28 40 30.0     13.90     ~ 99 0
16 PN M 2-31 PN 18 13 16.0521431976 -25 30 05.320920636   13.3 13.60     [WC4/6] 100 0
17 PN H 1-62 PN 18 13 17.9603689512 -32 19 42.905276868   12 14.00     WC10-11 52 0
18 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2437 1
19 NAME Galactic Bulge reg ~ ~           ~ 4158 0

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2023.09.21-16:29:01

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