J/ApJ/795/170 Sample SNRs for M31 and M33 (Jennings+, 2014)
The supernova progenitor mass distributions of M31 and M33: further evidence for
an upper mass limit.
Jennings Z.G., Williams B.F., Murphy J.W., Dalcanton J.J., Gilbert K.M.,
Dolphin A.E., Weisz D.R., Fouesneau M.
<Astrophys. J., 795, 170 (2014)>
=2014ApJ...795..170J 2014ApJ...795..170J (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Supernova remnants ; Photometry, HST
Keywords: galaxies: individual: M31, M33 - supernovae: general
Abstract:
Using Hubble Space Telescope photometry to measure star formation
histories, we age-date the stellar populations surrounding supernova
remnants (SNRs) in M31 and M33. We then apply stellar evolution models
to the ages to infer the corresponding masses for their supernova
progenitor stars. We analyze 33 M33 SNR progenitors and 29 M31 SNR
progenitors in this work. We then combine these measurements with 53
previously published M31 SNR progenitor measurements to bring our
total number of progenitor mass estimates to 115. To quantify the mass
distributions, we fit power laws of the form dN/dM∝M-α.
Our new larger sample of M31 progenitors follows a distribution with
α=4.4-0.4+0.4, and the M33 sample follows a distribution
with α=3.8-0.5+0.4. Thus both samples are consistent
within the uncertainties, and the full sample across both galaxies
gives α=4.2-0.3+0.3. Both the individual and full
distributions display a paucity of massive stars when compared to a
Salpeter initial mass function, which we would expect to observe if
all massive stars exploded as SN that leave behind observable SNR. If
we instead fix α=2.35 and treat the maximum mass as a free
parameter, we find Mmax∼35-45 M☉, indicative of a potential
maximum cutoff mass for SN production. Our results suggest that either
SNR surveys are biased against finding objects in the youngest
(<10 Myr old) regions, or the highest mass stars do not produce SNe.
Description:
First, we select SNRs from catalogs which overlap with HST fields in
M31 and M33. We limited our search to fields observed with the ACS and
WFPC-2 instruments, as the optical CMDs tend to be deeper and offer
the best SFH constraints. For M31, we combine three SNR catalogs to
select targets from: Braun & Walterbos (1993A&AS...98..327B 1993A&AS...98..327B);
Magnier et al. (1995, J/A+AS/114/215); Williams et al.
(1995BAAS...27..883W 1995BAAS...27..883W). All three catalogs make use of [S II]-to-Hα
ratios to identify SNR. Our M33 SNR catalog comes from Long et al.
(2010, J/ApJS/187/495), who selected SNRs using both [S II]-to-Hα
ratios and X-ray observations. Long et al. (2010, J/ApJS/187/495)
incorporated all previous SNR catalogs from the literature in their
analysis. As mentioned in Section 1, all new M31 data analyzed in this
work come from newly available PHAT data sets and therefore have
uniform filters and exposure times, while the M33 data comes from
various archival data sets coincident with SNR.
Objects:
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RA (ICRS) DE Designation(s)
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00 42 44.33 +41 16 07.5 M31 = NAME Andromeda
01 33 50.90 +30 39 35.8 M33 = NAME Triangulum Galaxy
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 63 Sample SNRs for M31 and M33
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See also:
J/A+AS/114/215 : New SNR candidates in M31 (Magnier+, 1995)
J/ApJS/187/495 : SNRs in M33 from optical and X-ray (Long+, 2010)
J/ApJ/793/134 : M33 SNR candidates properties (Lee+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Galaxy [M31-M33] SNR galaxy
5- 9 A5 --- ID SNR identifier
11- 17 F7.4 deg RAdeg Right Ascension in decimal degrees (J2000)
19- 25 F7.4 deg DEdeg Declination in decimal degrees (J200)
27- 32 A6 --- Field HST field (1)
34- 38 I5 --- Prog HST program identifier
40- 46 A7 --- Inst Instrument (ACS/WFC, WFPC2)
48- 52 A5 --- Filt1 First HST filter (F475W, F555W, F606W)
54- 58 F5.2 mag mag1 50% Completeness limit magnitude in
the filter Filt1
60- 64 A5 --- Filt2 [F814W] Second HST filter
66- 70 F5.2 mag mag2 50% Completeness limit magnitude in
the filter Filt2
72 I1 --- Cat [1/4] Catalog (2)
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Note (1): Field designation as listed in MAST.
Note (2): Catalog as follows:
1 = Magnier et al. (1995, J/A+AS/114/215), [MPV95] 2-NNN in Simbad;
2 = Williams et al. (1995BAAS...27..883W 1995BAAS...27..883W), [JWM2012] BW-NNN in Simbad;
3 = Braun & Walterbos (1993A&AS...98..327B 1993A&AS...98..327B), [WB92a] NNNA in Simbad;
4 = Long et al. (2010, J/ApJS/187/495), [LBW2010] NNN in Simbad.
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History:
From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 30-May-2017