J/PAZh/42/200 Dispersion measure of Milky Way and MC pulsars (Zhezher+, 2016)
Probing Milky Way's hot gas halo density distribution using the dispersion
measure of pulsars.
Zhezher Ya.V., Nugaev E.Ya., Rubtsov G.I.
<Pis'ma Astron. Zh. 42, 200 (2016)>
=2016PAZh...42..200Z 2016PAZh...42..200Z (SIMBAD/NED BibCode)
=2016AstL...42..173Z 2016AstL...42..173Z
ADC_Keywords: Milky Way ; Magellanic Clouds ; Pulsars ; Stars, distances
Keywords: missing baryons - hot gas - pulsars - dispersion measure
Abstract:
A number of recent studies indicates a significant amount of ionized
gas in a form of the hot gas halo around the Milky Way. The halo
extends over the region of 100 kpc and may be acountable for the
missing baryon mass. In this paper we calculate the contribution of
the proposed halo to the dispersion measure (DM) of the pulsars. The
Navarro, Frenk, and White (NFW), Maller and Bullock (MB), and
Feldmann, Hooper, and Gnedin (FHG) density distributions are considered
for the gas halo. The data set includes pulsars with the distance
known independently from the DM, e.g., pulsars in globular clusters,
LMC, SMC and pulsars with known parallax. The results exclude the NFW
distribution for the hot gas, while the more realisticMB and FHG
models are compatible with the observed dispersion measure.
Description:
In this paper we analyze pulsars in the MilkyWay, in the Large
Magellanic Cloud (LMC) and in the Small Magellanic Cloud (SMC).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 41 62 List of Milky Way pulsars with parallaxes
table3.dat 38 20 List of LargeMagellanic Cloud and Small
Magellanic Cloud pulsars
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Byte-by-byte Description of file: table1.dat table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Pulsar name (JHHMM+DDMM)
12- 17 F6.2 deg GLON Galactic longitude
19- 24 F6.2 deg GLAT Galactic latitude
26- 31 F6.3 kpc Dist Distance
33- 41 F9.5 pc/cm3 DM ?=- Dispersion measure
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-May-2016