1999A&A...350..997A


Query : 1999A&A...350..997A

1999A&A...350..997A - Astronomy and Astrophysics, volume 350, 997-1006 (1999/10-3)

Constraints of age, distance and progenitor of the supernova remnant RX J0852.0-4622/GRO J0852-4642.

ASCHENBACH B., IYUDIN A.F. and SCHOENFELDER V.

Abstract (from CDS):

The discovery of the nearest young supernova remnant RX J0852.0-4622/ GRO J0852-4642 in the Galaxy by ROSAT and COMPTEL has been reported recently. Age and distance are determined to ∼680 years and ∼200pc by the X-ray diameter and the γ-ray line flux of radioactive 44Ti. Here we discuss the implications of the X-ray spectra and of the fact that 1.8 MeV γ-ray line emission from the decay of 26Al has been measured from the Vela region with a certain fraction possibly associated with the new SNR. We estimate an uncertainty of the age of ±100yrs for a fixed yield of 44Ti. The highest values of 44Ti yield provided by current supernova explosion models give worst case upper limits of 1100yrs for the age and of 500pc for the distance. Also the unknown ionization stage of 44Ti adds to the uncertainty of age and distance which is at most another 35% on top. Both the energy balance compiled for the remnant and yield predictions for 44Ti and 26Al by supernova models favour a core-collapse event. Two point sources have been found in the vicinity of the explosion center, either one of these might be the neutron star left by the supernova. If there is a neutron star the X-ray count rates of the two point sources provide an upper limit of the blackbody surface temperature, which is very unlikely to exceed 3x105K. The supernova might have been observed some 700±150yrs ago, but based on the data of SN 1181, e.g., there is a realistic chance that it has been missed if the supernova was sub-luminous.

Abstract Copyright:

Journal keyword(s): shock waves - ISM: individual objects: RX J0852.0-4622 - ISM: supernova remnants - X-rays: general - X-rays: ISM

Nomenclature: text: [AIS99] JHHMMSS+DDMMSS N=2.

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1124 1
2 SNR G130.7+03.1 SNR 02 05 37.0 +64 49 42           ~ 588 4
3 SN 1997D SN* 04 11 01.00 -56 29 56.0       16.3   SNIIpec 168 1
4 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5027 0
5 M 1 SNR 05 34 32 +22 00.8           ~ 5903 1
6 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4691 2
7 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 867 0
8 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1167 2
9 [AIS99] J085158-462133 X 08 51 58 -46 21.6           ~ 2 0
10 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 442 2
11 [AIS99] J085203-461836 X 08 52 03 -46 18.6           ~ 3 0
12 * lam Vel LP* 09 07 59.75787 -43 25 57.3273 5.67 3.86 2.21 0.97 0.03 K4Ib 206 0
13 SN 1994W SN* 12 02 10.92 +62 08 32.7     13.3     SNIInP 176 1
14 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1260 1
15 NAME Kepler SNR Rad 17 30 35.976 -21 28 56.23           ~ 748 4
16 NAME Cas A SNR 23 23 24.000 +58 48 54.00     14.30     ~ 2591 1

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2022.05.19-21:14:50

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