2017ApJ...834..110A

Query : 2017ApJ...834..110A

2017ApJ...834..110A - Astrophys. J., 834, 110-110 (2017/January-2)

Searching for dark matter annihilation in recently discovered Milky Way satellites with Fermi-Lat.

ALBERT A., ANDERSON B., BECHTOL K., DRLICA-WAGNER A., MEYER M., SANCHEZ-CONDE M., STRIGARI L., WOOD M., ABBOTT T.M.C., ABDALLA F.B., BENOIT-LEVY A., BERNSTEIN G.M., BERNSTEIN R.A., BERTIN E., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CROCCE M., CUNHA C.E., D'ANDREA C.B., DA COSTA L.N., DESAI S., DIEHL H.T., DIETRICH J.P., DOEL P., EIFLER T.F., EVRARD A.E., FAUSTI NETO A., FINLEY D.A., FLAUGHER B., FOSALBA P., FRIEMAN J., GERDES D.W., GOLDSTEIN D.A., GRUEN D., GRUENDL R.A., HONSCHEID K., JAMES D.J., KENT S., KUEHN K., KUROPATKIN N., LAHAV O., LI T.S., MAIA M.A.G., MARCH M., MARSHALL J.L., MARTINI P., MILLER C.J., MIQUEL R., NEILSEN E., NORD B., OGANDO R., PLAZAS A.A., REIL K., ROMER A.K., RYKOFF E.S., SANCHEZ E., SANTIAGO B., SCHUBNELL M., SEVILLA-NOARBE I., SMITH R.C., SOARES-SANTOS M., SOBREIRA F., SUCHYTA E., SWANSON M.E.C., TARLE G., VIKRAM V., WALKER A.R., WECHSLER R.H. (The Fermi-LAT Collaboration) (The DES Collaboration)

Abstract (from CDS):

We search for excess γ-ray emission coincident with the positions of confirmed and candidate Milky Way satellite galaxies using six years of data from the Fermi Large Area Telescope (LAT). Our sample of 45 stellar systems includes 28 kinematically confirmed dark-matter-dominated dwarf spheroidal galaxies (dSphs) and 17 recently discovered systems that have photometric characteristics consistent with the population of known dSphs. For each of these targets, the relative predicted γ-ray flux due to dark matter annihilation is taken from kinematic analysis if available, and estimated from a distance-based scaling relation otherwise, assuming that the stellar systems are DM-dominated dSphs. LAT data coincident with four of the newly discovered targets show a slight preference (each ∼2σ local) for γ-ray emission in excess of the background. However, the ensemble of derived γ-ray flux upper limits for individual targets is consistent with the expectation from analyzing random blank-sky regions, and a combined analysis of the population of stellar systems yields no globally significant excess (global significance 1σ). Our analysis has increased sensitivity compared to the analysis of 15 confirmed dSphs by Ackermann et al. The observed constraints on the DM annihilation cross section are statistically consistent with the background expectation, improving by a factor of ∼2 for large DM masses (mDM,b{bar}b 1 TeV and m_DM,τ^+τ– 70 GeV) and weakening by a factor of ∼1.5 at lower masses relative to previously observed limits.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: dwarf - gamma rays: galaxies - gamma rays: galaxies

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 50

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Number of rows : 50
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 NAME Tuc IV G 00 02.9 -60 51           ~ 69 0
2 PMN J0003-6059 Rad 00 03 34.1 -60 59 38           ~ 1 0
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1359 4
4 NAME Cetus II G 01 17.9 -17 25           ~ 43 0
5 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 130 0
6 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 63 0
7 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1743 1
8 NAME Hor I G 02 55 31.7 -54 07 08           ~ 141 0
9 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 62 0
10 PMN J0335-5406 Rad 03 35 06.6 -54 06 26           ~ 3 0
11 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 309 0
12 PMN J0335-5352 Rad 03 35 48.0 -53 52 57           ~ 1 0
13 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 174 0
14 NAME Reticulum III G 03 45.4 -60 27           ~ 55 0
15 NAME Pic I G 04 43 47.4 -50 16 59           ~ 51 0
16 NAME Col I G 05 31.4 -28 02           ~ 50 0
17 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1125 0
18 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 374 0
19 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 465 1
20 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
21 NAME Sextans dSph G 10 13 02.9 -01 36 53   12 10.4     ~ 854 0
22 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 328 1
23 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 320 0
24 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 840 0
25 NAME Leo V G 11 31 09.60 +02 13 12.0     16.0     ~ 203 0
26 NAME Leo IV Dwarf Galaxy G 11 32 57.0 -00 32 00     15.1     ~ 383 1
27 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 91 1
28 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 97 0
29 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 452 1
30 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 263 2
31 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 326 1
32 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 96 1
33 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 241 0
34 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 437 0
35 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1359 0
36 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 107 0
37 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 368 0
38 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 345 1
39 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1331 1
40 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 74 0
41 NAME Ind II G 20 38.9 -46 10           ~ 27 0
42 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 58 0
43 NAME Gru II G 22 04.1 -46 26           ~ 85 0
44 NAME Pegasus III G 22 24 22.6 +05 25 12           ~ 55 0
45 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 155 0
46 NAME Grus I G 22 56 42.4 -50 09 48           ~ 102 0
47 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 258 0
48 NAME Tuc V G 23 37.4 -63 16           ~ 60 0
49 NAME Phe II G 23 39 59.4 -54 24 22           ~ 86 0
50 NAME Tuc III G 23 56.6 -59 36           ~ 189 0

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