J/ApJ/748/L29 SN Ia supernovae observed by Swift/XRT (Russell+, 2012)
Swift X-ray upper limits on type Ia supernova environments.
Russell B.R., Immler S.
<Astrophys. J., 748, L29 (2012)>
=2012ApJ...748L..29R 2012ApJ...748L..29R
ADC_Keywords: Supernovae ; Stars, masses ; X-ray sources
Keywords: circumstellar matter - supernovae: general - X-rays: general -
X-rays: ISM
Abstract:
We have considered 53 Type Ia supernovae (SNe Ia) observed by the
Swift X-Ray Telescope. None of the SNe Ia are individually detected at
any time or in stacked images. Using these data and assuming that the
SNe Ia are a homogeneous class of objects, we have calculated upper
limits to the X-ray luminosity (0.2-10 keV) and mass-loss rate of
L0.2-10<1.7x1038erg/s and
{dot}M<1.1x10-6M☉/yr x (vw)/(10km/s), respectively. The
results exclude massive or evolved stars as the companion objects in
SN Ia progenitor systems, but allow the possibility of main sequence
or small stars, along with double degenerate systems consisting of two
white dwarfs, consistent with results obtained at other wavelengths
(e.g., UV, radio) in other studies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 52 Type Ia supernova properties
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/MNRAS/426/2668 : Type Ia SN progenitors soft X-ray emission (Nielsen+, 2012)
J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)
J/ApJ/747/L19 : Type Ia SNR 0519-69.0 progenitors search (Edwards+, 2012)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)
J/A+A/500/L17 : Spectral flux ratio of SN Ia (Bailey+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Supernova name (YYYYaa)
8- 13 F6.2 d Date [2/832] Weighted average date after discovery
15- 18 F4.1 d b_Date Lower end of date range
20- 25 F6.1 d B_Date Upper end of date range
27- 32 F6.2 Mpc Dist [10.78/127] Distance from NED
34- 38 F5.1 ks Exp [0.7/288.3] Exposure time
40- 45 F6.1 10+31W Lum [2/2329] 3σ upper limit of 0.2-10keV
keV luminosity (in 1038erg/s)
47- 50 F4.1 10-7Msun/yr Mdot [3.2/75] The 3σ upper limit mass
loss rate, assuming Vwind=10km/s.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Oct-2013