J/ApJ/747/L19 A search for SNR 0519-69.0 progenitors (Edwards+, 2012)
The progenitor of the type Ia supernova that created SNR 0519-69.0 in the
Large Magellanic Cloud.
Edwards Z.I., Pagnotta A., Schaefer B.E.
<Astrophys. J., 747, L19 (2012)>
=2012ApJ...747L..19E 2012ApJ...747L..19E
ADC_Keywords: Supernova remnants ; Photometry, HST ; X-ray sources ;
Magellanic Clouds
Keywords: ISM: supernova remnants - supernovae: general
Abstract:
We present the results of a search for an ex-companion star in
SNR 0519-69.0, located in the Large Magellanic Cloud, based on images
taken with the Hubble Space Telescope with a limiting magnitude of
V=26.05. SNR 0519-69.0 is confidently known to be from a Type Ia
supernova based on its light echoes and X-ray spectra. The geometric
center of the remnant (based on the Hα and X-ray shell) is at
05:19:34.83, -69:02:06.92 (J2000). Accounting for the measurement
uncertainties, the orbital velocity, and the kick velocity, any
ex-companion star must be within 4.7" of this position at the 99.73%
confidence level. This circle contains 27 main-sequence stars brighter
than V=22.7, any one of which could be the ex-companion star left over
from a supersoft source progenitor system. The circle contains no
post-main-sequence stars, and this rules out the possibility of all
other published single-degenerate progenitor classes (including
symbiotic stars, recurrent novae, helium donors, and the
spin-up/spin-down models) for this particular supernova. The only
remaining possibility is that SNR 0519-69.0 was formed from either a
supersoft source or a double-degenerate progenitor system.
Description:
We have used public domain images of SNR 0519-69.0 from both HST and
from the Chandra X-Ray Observatory.
The HST images were taken with the Advanced Camera for Surveys in 2010
April (PI J. P. Hughes). F658N (Hα) and F550M (V-band)
observations were taken for a total of 4757 and 750s, respectively.
The Chandra X-ray observations in 2000 June had a total exposure of
40.6ks (PI S. S. Holt), with images available in three energy bands:
0.3-0.72keV, 0.72-1.05keV, and 1.05-10keV (Williams et al.
2001AIPC..565..185W 2001AIPC..565..185W).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 81 129 Stars inside the central error circle for SNR 0519-69.0
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-2013)
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/MNRAS/426/2668 : Soft X-ray emission of Ia SN progenitors (Nielsen+, 2012)
J/MNRAS/408/827 : Simulations of supernova explosions (Dessart+, 2010)
J/A+A/435/437 : Diameters for extragalactic SNRs (Urosevic+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- ID Intification number (1-127, RG or SG) (1)
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 16 F6.3 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination (J2000)
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 29 F5.2 arcsec DEs Arcsecond of Declination (J2000)
31- 33 F3.1 arcsec theta [0.1/7.4] Angular distance from center (2)
35- 39 F5.2 mag Vmag [19.13/26.03] HST/ACS F550M band magnitude
41- 44 F4.2 mag e_Vmag [0/0.19] Uncertainty in Vmag
46- 50 F5.2 mag V-Ha [-0.1/2.4]? The (F550M-Hα (F658N))
color index (3)
52- 55 F4.2 mag e_V-Ha [0/0.23]? Uncertainty in V-Ha
57- 81 A25 --- Comm Comments
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Note (1): The star marked 1 is the brightest main-sequence star in the central
region, and the nearest red giant and subgiant (both outside the
central region - outside the 4.7" error radius) are labeled RG and SG,
respectively; with the remainder of the stars listed in order of their
angular distance from the center.
Note (2): Where the geometric center of the remnant is at
05:19:34.83-69:02:06.92 (J2000).
Note (3): A missing color indicates there was a lack of significant
detection in Hα.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 07-Oct-2013