2021A&A...650A.187S


Query : 2021A&A...650A.187S

2021A&A...650A.187S - Astronomy and Astrophysics, volume 650A, 187-187 (2021/6-1)

Nucleosynthesis constraints through γ-ray line measurements from classical novae. Hierarchical model for the ejecta of 22Na and 7Be.

SIEGERT T., GHOSH S., MATHUR K., SPRAGGON E. and YEDDANAPUDI A.

Abstract (from CDS):


Context. Classical novae belong to the most frequent transient events in the Milky Way and are key agents of ongoing nucleosynthesis. Despite their large numbers, they have never been observed in soft γ-ray emission. Measurements of their γ-ray signatures would provide insights into explosion mechanism and nucleosynthesis products.
Aims. Our goal is to constrain the ejecta masses of 7Be and 22Na from classical novae through their γ-ray line emissions at 478 and 1275keV.
Methods. We extracted posterior distributions on the line fluxes from archival data of the INTEGRAL/SPI spectrometer telescope. We then used a Bayesian hierarchical model to link individual objects and diffuse emission, and to infer ejecta masses from the whole population of classical novae in the Galaxy.
Results. Individual novae are too dim to be detectable in soft γ-rays, and the upper bounds on their flux and ejecta mass uncertainties cover several orders of magnitude. Within the framework of our hierarchical model, we can nevertheless infer tight upper bounds on the 22Na ejecta masses, given all uncertainties from individual objects as well as diffuse emission, of <2.0x10–7M (99.85th percentile).
Conclusions. In the context of ONe nucleosynthesis, the 22Na bounds are consistent with theoretical expectations and exclude that most ONe novae occur on white dwarfs with masses of about 1.35M. The upper bounds from 7Be are uninformative. From the combined ejecta mass estimate of 22Na and its β+ decay, we infer a positron production rate of <5.5x1042e+/s, which would mean 10% at most of the total annihilation rate in the Milky Way.

Abstract Copyright: © ESO 2021

Journal keyword(s): gamma rays: general - methods: statistical - novae, cataclysmic variables - stars: abundances - ISM: abundances

Simbad objects: 109

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Number of rows : 109
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12559 1
2 V* V965 Per CV* 03 11 16.23 +37 05 02.7           ~ 7 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17262 1
4 NAME Gal Anticenter reg 05 46 +28.9           ~ 901 0
5 V* V959 Mon No* 06 39 38.5986803977 +05 53 52.878876073           ~ 157 0
6 V* V838 Mon No* 07 04 04.8221494992 -03 50 50.648894412       15.181 14.51 M10+B3V 418 0
7 V* V598 Pup CV* 07 05 42.4998538512 -38 14 39.435813924   16.07   15.86 15.85 ~ 39 0
8 V* V574 Pup No* 07 41 53.5879413696 -27 06 37.894596372   18.2 17.9     ~ 53 0
9 V* V549 Vel No* 08 50 29.6173052127 -47 45 28.322206658   17.67 16.45 15.90 15.09 ~ 20 0
10 V* V906 Car No* 10 36 15.4286177568 -59 35 53.696262804           ~ 89 1
11 V* V679 Car No* 11 13 53.8 -61 13 48           ~ 20 0
12 V* V357 Mus No* 11 26 12.20 -65 31 08.6           ~ 23 0
13 V* V1065 Cen No* 11 43 10.121 -58 04 04.08       18.4   ~ 45 0
14 V* DZ Cru CV? 12 23 16.2 -60 22 34           ~ 21 0
15 V* QY Mus CV? 13 16 36.4055445624 -67 36 47.931702084   19.9   17.5   ~ 15 0
16 V* V1047 Cen No* 13 20 49.74 -62 37 50.5           ~ 34 0
17 V* V1405 Cen No* 13 20 55.35 -63 42 19.1           ~ 10 0
18 V* FM Cir No* 13 53 27.59 -67 25 00.9           ~ 14 0
19 OGLE 2015-NOVA-3 No* 14 07 31.34 -63 13 11.5           ~ 4 0
20 V* V1212 Cen No* 14 35 02.5 -64 06 20           ~ 7 0
21 V* DE Cir CV* 15 17 52.6893771024 -61 57 16.260297120           ~ 14 0
22 V* V407 Lup No* 15 29 01.79 -44 49 39.5           ~ 39 0
23 V* IM Nor No* 15 39 26.4789581496 -52 19 17.968468997           ~ 90 0
24 V* V555 Nor No* 15 41 45.24 -53 08 05.9           ~ 7 0
25 V* NR TrA No* 16 18 48.2144738272 -60 27 49.045919601           ~ 13 0
26 V* V382 Nor No* 16 19 44.74 -51 34 53.1           ~ 34 0
27 V* U Sco CV* 16 22 30.7791646104 -17 52 43.166822628           F8+K2 547 0
28 V* V1313 Sco No* 16 36 43.0 -41 32 46           ~ 20 0
29 V* V1662 Sco No* 16 48 49.62 -44 57 03.2           ~ 9 0
30 V* V1657 Sco No* 16 52 18.87 -37 54 18.9           ~ 7 0
31 V* V1280 Sco No* 16 57 40.91 -32 20 36.4           ~ 98 0
32 V* V1535 Sco Sy* 17 03 26.1705418392 -35 04 17.816830248           ~ 43 0
33 V* V1663 Sco No* 17 03 47.509 -38 16 57.14           ~ 8 0
34 V* V1310 Sco No* 17 06 07.53 -37 14 27.4           ~ 16 0
35 V* V1186 Sco CV* 17 12 51.2672500922 -30 56 37.699681585           ~ 42 0
36 V* V3665 Oph No* 17 14 02.53 -28 49 23.3           ~ 7 0
37 V* V2576 Oph CV* 17 15 33.00 -29 09 39.9           ~ 23 0
38 V* V1661 Sco No* 17 18 06.37 -32 04 27.7           ~ 5 0
39 PNV J17184490-2454220 No* 17 18 45.04 -24 54 22.1           ~ 6 0
40 V* V1656 Sco No* 17 22 51.46 -31 58 37.1           ~ 12 0
41 [KW2003] 11 Mi* 17 24 39.9557643000 -24 21 47.399493024       16.106   ~ 11 0
42 V* V2676 Oph No* 17 26 07.08 -25 51 45.4           ~ 35 0
43 V* V2674 Oph No* 17 26 32.1053398841 -28 49 38.633030381           ~ 26 0
44 V* V2944 Oph No* 17 29 13.42 -18 46 13.8           ~ 34 0
45 V* V1187 Sco No* 17 29 18.81 -31 46 01.5           ~ 49 0
46 VVV J173034.12-310607.0 CV* 17 30 34.1334502128 -31 06 07.038593604           ~ 8 0
47 V* V1533 Sco No* 17 33 59.43 -36 06 21.6           ~ 9 0
48 V* V2949 Oph No* 17 34 47.75 -24 09 04.2           ~ 9 0
49 V* V2540 Oph No* 17 37 34.3865392788 -16 23 18.559226454           ~ 52 0
50 V* V1655 Sco No* 17 38 19.31 -37 25 08.7           ~ 6 0
51 V* V2672 Oph No* 17 38 19.72 -26 44 13.7           ~ 53 0
52 V* V3662 Oph No* 17 39 46.10 -24 57 55.8           ~ 17 0
53 V* V2615 Oph No* 17 42 43.9985841119 -23 40 35.084130692           ~ 53 1
54 V* V1659 Sco No* 17 42 57.68 -33 25 42.9           ~ 7 0
55 V* V5581 Sgr CV? 17 44 08.4597181283 -26 05 48.004983718       17.15   ~ 12 0
56 V* V5582 Sgr CV* 17 45 05.4079587075 -20 03 21.633486080           ~ 16 0
57 V* V5589 Sgr No* 17 45 28.03 -23 05 22.8           ~ 42 0
58 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14214 0
59 V* V4744 Sgr No* 17 47 21.74 -23 28 23.1           ~ 15 0
60 V* V5587 Sgr No* 17 47 46.33 -23 35 13.1           ~ 14 0
61 OGLE 2015-NOVA-1 No* 17 48 12.82 -32 35 13.4           ~ 9 0
62 OGLE 2016-NOVA-2 CV* 17 49 57.33 -29 14 37.9           ~ 7 0
63 V* RS Oph Sy* 17 50 13.1591484960 -06 42 28.480729788   11.884 10.776 11.228   K5.5/M0IIIe 1080 0
64 V* V1324 Sco No* 17 50 53.9093841216 -32 37 21.090962028           ~ 90 0
65 V* V5591 Sgr No* 17 52 25.7939306544 -21 26 21.682062240           ~ 18 0
66 V* V5586 Sgr CV* 17 53 03.16632 -28 12 18.2664           ~ 18 0
67 V* V5117 Sgr No* 17 58 52.61 -36 47 35.1           ~ 20 0
68 V* V5853 Sgr No* 18 01 07.78 -26 31 43.4           ~ 14 0
69 V* V5669 Sgr No* 18 03 32.7413774913 -28 16 05.517235794           ~ 13 0
70 PNV J18040967-1803581 No* 18 04 09.45 -18 03 55.8           ~ 7 0
71 V* V5579 Sgr No* 18 05 58.88 -27 13 56.0           ~ 34 0
72 V* V5585 Sgr No* 18 07 26.9431616295 -29 00 43.702046200           ~ 18 0
73 V* V556 Ser CV* 18 09 03.46 -11 12 34.5           ~ 6 0
74 V* V5113 Sgr No* 18 10 10.5091596092 -27 45 32.664644505           ~ 26 0
75 V* V5558 Sgr No* 18 10 18.2602518799 -18 46 52.222364370           ~ 68 0
76 V* V5588 Sgr No* 18 10 21.3479238157 -23 05 30.044814019           ~ 35 0
77 V* V5855 Sgr No* 18 10 28.29 -27 29 59.3           ~ 27 0
78 V* V5115 Sgr No* 18 16 59.04 -25 56 38.8           ~ 39 0
79 V* V5116 Sgr No* 18 17 50.7277266627 -30 26 32.079704535     19.181   18.962 ~ 67 0
80 V* V5593 Sgr No* 18 19 36.9494206920 -19 07 40.218638268           ~ 12 0
81 V* V5592 Sgr No* 18 20 27.26 -27 44 26.3           ~ 18 0
82 V* V5856 Sgr No* 18 20 52.25 -28 22 12.1           ~ 41 0
83 V* V5580 Sgr CV* 18 22 01.39 -28 02 39.8           ~ 12 0
84 V* V5850 Sgr CV* 18 22 59.25 -19 14 14.8           ~ 7 0
85 V* V5666 Sgr No* 18 25 08.76 -22 36 02.6           ~ 12 0
86 V* V611 Sct No* 18 25 29.87 -09 47 32.3           ~ 7 0
87 V* V612 Sct No* 18 31 45.86 -14 18 55.5           ~ 29 0
88 V* V476 Sct No* 18 32 04.75 -06 43 34.3           ~ 29 0
89 V* V5668 Sgr No* 18 36 56.827920 -28 55 39.97524       16.028   ~ 115 0
90 V* V496 Sct No* 18 43 45.57 -07 36 42.0           ~ 49 0
91 V* V1723 Aql No* 18 47 38.38 -03 47 14.1           ~ 30 0
92 V* V475 Sct CV* 18 49 37.602 -09 33 50.94           ~ 34 0
93 V* V1724 Aql CV* 18 52 34.96 -00 18 42.3           ~ 16 0
94 V* V4743 Sgr No* 19 01 09.3393890856 -22 00 06.016418064           ~ 146 0
95 V* V1830 Aql No* 19 02 33.38 +03 15 19.0           ~ 11 0
96 V* V1721 Aql CV* 19 06 28.60 +07 06 44.5           ~ 19 0
97 V* V1831 Aql No* 19 21 50.15 +15 09 24.8           ~ 13 0
98 V* V2491 Cyg CV* 19 43 01.9771342416 +32 19 13.549047276 18.27 18.72 18.03 17.72 17.41 ~ 164 0
99 V* V459 Vul No* 19 48 08.81 +21 15 29.9           ~ 18 0
100 V* V458 Vul PN 19 54 24.6304743344 +20 52 52.134341488   17.76 15.96 17.9   ~ 123 0
101 V* V2468 Cyg No* 19 58 33.3664749701 +29 52 06.566932312           ~ 46 0
102 V* V2659 Cyg No* 20 21 42.3230575202 +31 03 29.401428736           ~ 24 0
103 V* V339 Del No* 20 23 30.6864752010 +20 46 03.777415270   17.50 16.86     ~ 203 0
104 V* V404 Cyg HXB 20 24 03.8254458776 +33 52 01.962185735           G9/K0III/V 1263 0
105 V* V2467 Cyg No* 20 28 12.4766190480 +41 48 36.387108828   20.0   18.5   ~ 47 0
106 V* V1974 Cyg No* 20 30 31.6546001712 +52 37 50.837478240           ~ 577 0
107 V* V809 Cep No* 23 08 04.71 +60 46 52.1           ~ 21 0
108 NAME Galactic Ridge ? ~ ~           ~ 492 1
109 NAME Galactic Bulge reg ~ ~           ~ 4254 0

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