2004A&A...422..591C


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST13:55:28

2004A&A...422..591C - Astronomy and Astrophysics, volume 422, 591-602 (2004/8-1)

Dust-to-gas ratios in the Kepler supernova remnant.

CONTINI M.

Abstract (from CDS):

A new method to evaluate the dust-to-gas ratios in the Kepler SNR is presented. Dust emission in the infrared and bremsstrahlung are calculated consistently, considering that dust grains are collisionally heated by the gas throughout the front and downstream of both the expanding and the reverse shocks. The calculated continuum SED is constrained by the observational data. The dust-to-gas ratios are determined by the ratio of the dust emission bump and bremsstrahlung in the infrared. The shell-like morphological similarity of X-ray and radio emission, and of images in Hα and in infrared wavelengths confirms that both radio and X-ray emissions are created at the front of the expanding shock and that dust and gas are coupled crossing the expanding and reverse shock fronts. The results show that large grains with radius of ∼1µm with dust-to-gas ratios <4x10–3 survive sputtering and are heated to a maximum temperature of 125K downstream of the shock expanding outwards with a velocity of about 1000km/s. The high velocity shocks become radiative for dust-to-gas ratios >10–3. Such shocks do not appear in the NE region, indicating that dust grains are not homogeneously distributed throughout the remnant. Smaller grains with radius of about 0.2µm and dust-to-gas ratios of ∼4x10–4 are heated to a maximum temperature of ∼50K downstream of the reverse shock corresponding to velocities of about 50km/s. A maximum dust mass <0.16M is calculated.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - X-rays: stars - shock waves - ISM: individual objects: Kepler SNR

CDS comments: Tables 4-6 : Knots DNN = [DBD86] Knot NN in Simbad, knots P2D1 and SWD9 = [BLV91] P2Diff1 and [BLV91] SWD9

Simbad objects: 13

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Number of rows : 13

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 [DBD86] Knot 3 PoC 17 30 35.39 -21 28 58.0           ~ 4 0
2 [DBD86] Knot 9 ? 17 30 35.74 -21 28 59.9           ~ 3 0
3 [DBD86] Knot 10 ? 17 30 35.82 -21 28 54.5           ~ 2 0
4 NAME Kepler SNR Rad 17 30 35.976 -21 28 56.23           SNIa 695 4
5 [DBD86] Knot 18 PoC 17 30 36.14 -21 29 01.8           ~ 4 0
6 [DBD86] Knot 25 PoC 17 30 36.54 -21 28 43.7           ~ 3 0
7 [DBD86] Knot 27 ? 17 30 36.67 -21 28 35.5           ~ 2 0
8 [DBD86] Knot 34 ? 17 30 39.15 -21 29 16.7           ~ 3 0
9 [DBD86] Knot 35 ? 17 30 39.29 -21 29 15.4           ~ 3 0
10 [DBD86] Knot 38 ? 17 30 39.60 -21 29 18.8           ~ 3 0
11 [DBD86] Knot 40 ? 17 30 39.89 -21 29 19.0           ~ 3 0
12 [BLV91] SWD9 PoC ~ ~           ~ 2 1
13 [BLV91] P2Diff1 PoC ~ ~           ~ 2 1

    Equat.    Gal    SGal    Ecl

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2019.10.17-13:55:28

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