2001A&A...372..516W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:57:37

2001A&A...372..516W - Astronomy and Astrophysics, volume 372, 516-526 (2001/6-3)

Far Ultraviolet Spectroscopic Explorer observations of high-velocity gas associated with the Monoceros Loop SNR.

WELSH B.Y., SFEIR D.M., SALLMEN S. and LALLEMENT R.

Abstract (from CDS):

We present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of high-velocity gas (VLSR=+65km/s) seen towards the star HD 47240 which lies just behind the Monoceros Loop Supernova Remnant at a distance of ∼1800pc. This high-velocity absorption feature is detected in the far ultraviolet lines of O I, Ar I, N I, C I, Fe II and P II, in addition to being detected at visible wavelengths in Na I and Ca II and at near ultraviolet wavelengths in Mg II, Mg I, S II, O I, Si II, C II*, Al II and Fe II. High-velocity interstellar gas has not been detected in the high-ionization (high-temperature) species of O VI, C IV and Si IV. Gas phase abundances relative to that of sulphur for this high velocity feature have been derived. The refractory elements of Fe, Si and Al are all less depleted than that normally found for cold disk gas in the interstellar medium, with a pattern of relative abundance more similar to that of warm interstellar disk gas. However, the elements of N, O, and Ar show an opposite pattern of relative depletion in which their apparent elemental deficiency may be attributed to ionization effects, as also found for high-velocity gas associated with the Vela SNR by Jenkins et al. (1988). The lack of detection of high-ionization gas at high velocity suggests that the Monoceros Loop remnant is more evolved than other remnants such as the Vela SNR or Cygnus Loop, and that an age of 30000-150000 years seems appropriate.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: abundances

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 2244 OpC 06 31 55 +04 56.5   5.26 4.8     ~ 563 4
2 HD 47240 Pu* 06 37 52.7036331811 +04 57 24.007346108 5.65 6.35 6.20 5.98 5.87 B1Ib 149 0
3 HD 47359 Be* 06 38 24.9041000013 +04 52 51.358663784 8.27 9.11 8.87     B0.5IVnn 39 0
4 NAME Monoceros SNR SNR 06 38 43 +06 30.2           ~ 212 0
5 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1587 1
6 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1110 2

    Equat.    Gal    SGal    Ecl

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2020.07.05-06:57:37

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