2018MNRAS.473.1537G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST04:17:29

2018MNRAS.473.1537G - Mon. Not. R. Astron. Soc., 473, 1537-1553 (2018)

Lack of thermal energy in superbubbles: hint of cosmic rays?

GUPTA S., NATH B.B., SHARMA P. and EICHLER D.

Abstract (from CDS):

Using analytic methods and 1D two-fluid simulations, we study the effect of cosmic rays (CRs) on the dynamics of interstellar superbubbles (ISBs) driven by multiple supernovae (SNe)/stellar winds in OB associations. In addition to CR advection and diffusion, our models include thermal conduction and radiative cooling. We find that CR injection at the reverse shock or within a central wind-driving region can affect the thermal profiles of ISBs and hence their X-ray properties. Even if a small fraction (10-20 per cent) of the total mechanical power is injected into CRs, a significant fraction of the ram pressure at the reverse shock can be transferred to CRs. The energy transfer becomes efficient if (1) the reverse shock gas Mach number exceeds a critical value (Mth ≳ 12) and (2) the CR acceleration time-scale τacc∼ κcr/v2 is shorter than the dynamical time, where κcr is a CR diffusion coefficient and v is the upstream velocity. We show that CR affected bubbles can exhibit a volume-averaged hot gas temperature 1-5 x 106 K, lower by a factor of 2 - 10 than without CRs. Thus, CRs can potentially solve the long-standing problem of the observed low ISB temperatures.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): hydrodynamics - shock waves - ISM: bubbles - cosmic rays - galaxies: star clusters: general

Simbad objects: 24

goto Full paper

goto View the reference in ADS

Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 980 0
2 LHA 120-N 79 HII 04 52 00 -69 22.5           ~ 50 1
3 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 227 0
4 LHA 120-N 105 EmO 05 09 57.1 -68 53 31           ~ 37 0
5 LHA 120-N 30 HII 05 14 34.4 -67 34 03           ~ 16 0
6 LHA 120-N 119 HII 05 18 39.2 -69 13 22           ~ 50 1
7 LHA 120-N 44 EmO 05 22 06.9 -67 56 46           ~ 161 1
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14312 1
9 NGC 1948 As* 05 24 20.00 -66 24 12.0   10.81 10.61     ~ 99 0
10 LHA 120-N 144 HII 05 26 42.5 -68 49 34           ~ 63 0
11 LHA 120-N 206A HII 05 31 15.2 -71 03 58           ~ 95 2
12 LHA 120-N 55 EmO 05 32 32.9 -66 24 20           ~ 39 0
13 NGC 2029 SNR 05 35 15.5 -67 34 04     12.29     ~ 88 0
14 M 42 HII 05 35 17.3 -05 23 28           ~ 3657 0
15 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1674 2
16 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 108 1
17 LHA 120-N 180 HII 05 49 13 -70 06.4           ~ 29 0
18 NAME Rosette Nebula HII 06 31 40 +04 57.8           ~ 428 1
19 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 735 0
20 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 866 2
21 NGC 3606 GiG 11 16 15.645 -33 49 38.67   13.42   11.72   ~ 56 0
22 ESO 134-11 HII 14 40 29 -62 38.7           ~ 493 1
23 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1455 0
24 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 72 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018MNRAS.473.1537G and select 'bookmark this link' or equivalent in the popup menu


2019.10.14-04:17:29

© Université de Strasbourg/CNRS

    • Contact