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 R_V 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 R_V can then be found. The ratio of total-to-selective extinction in the Galactic bulge is consistent with the value R_V=3.1, which is the same as has been found in the local neighborhood. The suggestion that R_V 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

Full paper

View the references in ADS

Number of rows : 19

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	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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