2025MNRAS.544.2946A

Query : 2025MNRAS.544.2946A

2025MNRAS.544.2946A - Mon. Not. R. Astron. Soc., 544, 2946-2986 (2025/December-2)

Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory.

ABE K., ABE S., ABHIR J., ABHISHEK A., ACERO F., ACHARYYA A., ADAM R., AGUASCA-CABOT A., AGUDO I., AGUIRRE-SANTAELLA A., ALFARO J., ALFARO R., ALISPACH C., ALVES BATISTA R., AMANS J.-P., AMATO E., AMBROSI G., AMBROSINO D., AMBROSINO F., ANGEL L., ANTONELLI L.A., ARAMO C., ARCARO C., ASANO K., ASCASIBAR Y., AUGUSTO STUANI L., BACKES M., BALAZS C., BALBO M., BAQUERO LARRIVA A., BARBOSA MARTINS V., BARRIO J.A., BARRIOS-JIMENEZ L., BARTOLINI C., BATISTA P.I., BATKOVIC I., BATZOFIN R., GONZALEZ J.B., BECK G., BECKER TJUS J., BENBOW W., BERGE D., BERNARDINI E., BERNETE J., BERTI A., BERTUCCI B., BESHLEY V., BHATTACHARJEE P., BHATTACHARYYA S., BIGONGIARI C., BILAND A., BISSALDI E., BLANCH O., BLAZEK J., BONNOLI G., BONOLLO A., BOSNJAK Z., BOTTACINI E., BOTTCHER M., BRINGMANN T., BRONZINI E., BROSE R., BRUNELLI G., BUCES SAEZ J., BUNSE M., BURMISTROV L., BURTON M., CALISSE P.G., CAMPOY-ORDAZ A., CANTLAY B.K., CAPASSO G., CAPRONI A., CAPUZZO-DOLCETTA R., CARAVEO P., CAROFF S., CAROSI R., CARQUIN E., CARRASCO M.-S., CASCONE E., CASTIGNANI G., CASTRO-TIRADO A.J., CERASOLE D., CERRUTI M., CERVINO CORTINEZ A., CHADWICK P.M., CHAI Y., CHATY S., CHEN A.W., CHEN Y., CHERNYAKOVA M., CHIAVASSA A., CHON G., CHUDOBA J., CICCIARI G.M., CIFUENTES A., COIMBRA ARAUJO C.H., COLAPIETRO M., CONFORTI V., CONTRERAS J.L., CORNEJO B., CORTINA J., COSTA A., COSTANTINI H., COTTER G., CRISTOFARI P., CUEVAS O., CURTIS-GINSBERG Z., D'AMICO G., D'AMMANDO F., DAVID L., DAZZI F., DE ANGELIS A., DE BONY DE LAVERGNE M., DE FRONDAT LAADIM F., DE GOUVEIA DAL PINO E.M., DE LOTTO B., DE NAUROIS M., DE PALMA G., DE SOUZA V., DEL BURGO R., DEL PERAL L., DEL VALLE M.V., DELGADO C., DELLA VOLPE D., DEPAOLI D., DI GIROLAMO T., DI PIANO A., DI PIERRO F., DI TRIA R., DI VENERE L., DIEBOLD S., DINESH A., DJUVSLAND J., DONINI A., DORNER J., DORO M., DUANGCHAN C., DUCCI L., DWARKADAS V.V., EBR J., ECKNER C., EGBERTS K., ELSASSER D., EMERY G., ESCANUELA NIEVES C., ESCARATE P., ESCOBAR GODOY M., ESPOSITO P., ETTORI S., FALCETA-GONCALVES D., FEDOROVA E., FEGAN S., FENG Q., FERRAND G., FERRAROTTO F., FIANDRINI E., FIASSON A., FILIPOVIC M., FIORETTI V., FOFFANO L., FONTAINE G., FRIAS GARCIA-LAGO F., FUKAZAWA Y., FUKUI Y., FURNISS A., GALANTI G., GALAZ G., GALLOZZI S., GAMMALDI V., GARCIA SOTO S., GARCZARCZYK M., GASBARRA C., GASPARRINI D., GAUG M., GERMANI S., GHALUMYAN A., GIANOTTI F., GIESBRECHT FORMIGA PAIVA J.G., GIGLIETTO N., GIORDANO F., GIUFFRIDA R., GLICENSTEIN J.-F., GLOMBITZA J., GOLDONI P., GONZALEZ J.M., COELHO J.G., GRADETZKE T., GRANOT J., GREAUX L., GREEN D., GREEN J.G., GROLLERON G., GUEDES L.M.V., GUETA O., HADASCH D., HAMAL P., HANLON W., HARA S., HARVEY V.M., HASSAN T., HAYASHI K., HESS B., HECKMANN L., HELLER M., HIROSHIMA N., HNATYK B., HNATYK R., HOFFMANN D., HOFMANN W., HORAN D., HORVATH P., HRUPEC D., HUSSAIN S., IARLORI M., INADA T., INCARDONA F., INOUE S., INOUE Y., IOCCO F., IULIANO A., JAHANVI, JAMROZY M., JANECEK P., JANKOWSKY F., JARNOT C., JAROSCHEWSKI I., JEAN P., JIMENEZ MARTINEZ I., JIN W., JURYSEK J., KALEKIN O., KARAS V., KATAOKA J., KAUFMANN S., KAZANAS D., KEITA T., KERSZBERG D., KIEDA D.B., KISSMANN R., KLUZNIAK W., KOHRI K., KOLAR D., KOMIN N., KORNECKI P., KOWAL G., KUBO H., KUSHIDA J., LA BARBERA A., LA PALOMBARA N., LACAVE B., LAINEZ M., LAMASTRA A., LAPINGTON J., LAZAREVIC S., LENAIN J.-P., LEONE F., LEONORA E., LI Y., LINDFORS E., LINHOFF M., LOMBARDI S., LONGO F., LOPEZ-COTO R., LOPEZ-MOYA M., LOPEZ-ORAMAS A., LOPORCHIO S., LOZANO BAHILO J., LUCIANI H., LUQUE-ESCAMILLA P.L., LYARD E., MACIAS O., MACKEY J., MAJUMDAR P., MALYSHEV D., MANDAT D., MANGANO S., MANICO G., MARCHETTI A., MARIOTTI M., MARQUEZ I., MARSELLA G., MARTIN DOMINGUEZ D., MARTINEZ G.A., MARTINEZ M., MARTINEZ O., MAZIN D., MELLO A.J.T.S., MENDEZ GALLEGO J., MENON S., MEREGHETTI S., MEYER D.M.-A., MEYER M., MICELI D., MICELI M., MICHAILIDIS M., MIENER T., MIRANDA J.M., MITCHELL A., MOLERO M., MOLFESE C., MOLINA DELICADO M., MOLINA E., MONTARULI T., MORALEJO A., MORENO RAMOS A., MORSELLI A., MOULIN E., MOYA ZAMANILLO V., MUNARI K., MURACH T., MURACZEWSKI A., MURAISHI H., NAKAMORI T., NEMMEN R., NETO J.P., NIEMIEC J., NIETO D., ROSILLO M.N., NIKOLAJUK M., NISHIJIMA K., NODA K., NOSEK D., NOVOTNY V., NOZAKI S., OKUMURA A., OLIVE J.-F., ONG R.A., ORITO R., ORLANDINI M., ORLANDO E., ORLANDO S., OTERO-SANTOS J., OYA I., MOGHADAM M.O., PAGLIARO A., PALATIELLO M., PANDEY A., PANEBIANCO G., PANEQUE D., PANTALEO F.R., PAOLETTI R., PAREDES J.M., PARMIGGIANI N., PATRICELLI B., PECH M., PECIMOTIKA M., PERESANO M., PEREZ AGUILERA A., PEREZ-ROMERO J., PERON G., PERROTTA F., PERSIC M., PETRUK O., PFEIFLE F., PIETROPAOLO E., PINCHBECK L., PINTORE F., PIROLA G., PITTORI C., PODOBNIK F., POHL M., POIREAU V., POLLET V., PONTI G., GONZALEZ C.P., PRANDINI E., PRINCIPE G., PROUZA M., PUESCHEL E., PUHLHOFER G., PUMO M.L., QUIRRENBACH A., RAINO S., RANDO R., RECCHIA S., REGEARD M., REIMER A., REIMER O., REIS I., REISENEGGER A., RHODE W., RIBO M., RICCI C., RICHTLER T., RICO J., RIEGER F., RIITANO L., RIOS C., RIZI V., ROACHE E., RODRIGUEZ-FERNANDEZ G., RODRIGUEZ FRIAS M.D., RODRIGUEZ-VAZQUEZ J.J., ROMANO P., ROMEO G., ROSADO J., ROSALES DE LEON A., ROWELL G., ROY A., RUDAK B., RUINA A., RUIZ-VELASCO E., QUEIROZ F.S., SADEH I., SAHA L., SALZMANN H., SANCHEZ-CONDE M., SANGIORGI P., SANO H., SANTOS-LIMA R., SAPIENZA V., SARKAR S., SATURNI F.G., SAVARESE S., SAVCHENKO V., SCHERER A., SCHIAVONE F., SCHIPANI P., SCHUSSLER F., SENGUPTA D., SERGIJENKO O., SGUERA V., SIEJKOWSKI H., SILVESTRI G., SIMONGINI A., SIQUEIRA C., SLIUSAR V., SOFIA I., SOL H., SPIGA D., SPINELLO S., STAMERRA A., STANIC S., STARECKI T., STARLING R., STOLARCZYK T., SUDA Y., TAJIMA H., TAKAHASHI M., TAKEISHI R., TANAKA S.J., TEJEDOR L.A., TESHIMA M., TESTA V., TIAN W.W., TIBALDO L., TIBOLLA O., TINGAY S.J., TOMBESI F., TONEV D., TORRADEFLOT F., TORRES D.F., TOTHILL N., TRAMACERE A., TRAVNICEK P., TROIS A., TRUZZI S., TUTONE A., VACULA M., VAN ELDIK C., VANDENBROUCKE J., VASSILIEV V., ACOSTA M.V., VECCHI M., VENTURA S., VERCELLONE S., VERNA G., VIALE I., VIANA A., VIAUX N., VIGLIANO A., VIGNATTI J., VIGORITO C.F., VISENTIN E., VITALE V., VOITSEKHOVSKYI V., VOROBIOV S., VOUTSINAS G., WALTER R., WECHAKAMA M., WHITE M., WIERZCHOLSKA A., WOHLLEBEN F., XOTTA F., YAMAZAKI R., YAO Y., YOSHIKOSHI T., ZAVRTANIK D., ZAVRTANIK M., ZECH A., ZHANG W., ZHDANOV V.I., ZIVEC M. and ZURIAGA-PUIG J.

Abstract (from CDS):

The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the search for indirect dark matter (DM) signatures in the GeV-to-TeV $\gamma$-ray range owing to their lack of astrophysical $\gamma$-ray background. We present forecasts of the sensitivity of the forthcoming Cherenkov Telescope Array Observatory (CTAO) to annihilating or decaying DM signals in these targets. An original selection of candidates is performed from the current catalogue of known objects, including both classical and ultrafaint dSphs. For each, the expected DM content is derived using the most comprehensive photometric and spectroscopic data available, within a consistent framework of analysis. This approach enables the derivation of novel astrophysical factor profiles for indirect DM searches, which are compared with results from the literature. From an initial sample of 64 dSphs, eight promising targets are identified - Draco I, Coma Berenices, Ursa Major II, Ursa Minor, and Willman 1 in the North, Reticulum II, Sculptor, and Sagittarius II in the South - for which different DM density models yield consistent expectations, leading to robust predictions. CTAO is expected to provide the strongest limits above $\sim$10 TeV, reaching velocity-averaged annihilation cross sections of $\sim 5\times 10^{-25}$ cm$^3$ s$^{-1}$ and decay lifetimes up to $\sim 10^{26}$ s for combined limits. The dominant uncertainties arise from the imprecise determination of the DM content, particularly for ultrafaint dSphs. Observation strategies are proposed that optimize either deep exposures of the best candidates or diversified target selections.

Abstract Copyright: © The Author(s) 2025. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): radiation mechanisms: non-thermal - methods: numerical - galaxies: dwarf - Local Group - dark matter - gamma-rays: galaxies

Simbad objects: 73

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Number of rows : 73
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 0
2 NAME Tuc IV G 00 02.9 -60 51           ~ 90 0
3 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
4 4FGL J0059.5-3338 AG? 00 59 32.9 -33 38 27           ~ 12 0
5 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
6 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
7 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
8 NAME Cetus III Dwarf Galaxy LSB 02 05 19.40 -04 16 12.0           ~ 32 0
9 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
10 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
11 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
12 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
13 NAME Hydrus I G 02 29 33.4 -79 18 32           ~ 80 0
14 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
15 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
16 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
17 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
18 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
19 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
20 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
21 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
22 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
24 NAME Col I G 05 31.4 -28 02           ~ 60 0
25 NAME Pic II G 06 44 43 -59 53.8           ~ 33 0
26 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
27 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
28 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
29 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
30 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
31 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
32 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
33 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
34 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
35 NAME Carina I HII Region HII 10 43 32 -59 35.0           ~ 59 0
36 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
37 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
38 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
39 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
40 NAME UMa III Cl* 11 38 49.8 +31 04 42           ~ 22 0
41 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
42 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
43 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
44 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
45 NAME Centaurus I G 12 38 20 -40 54.1     14.78     ~ 29 0
46 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
47 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
48 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
49 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
50 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
51 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
52 NAME Bootes IV LSB 15 34 45 +43 43.6           ~ 24 0
53 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
54 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
55 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
56 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
57 NAME Sgr I Window reg 17 56 -29.0           ~ 71 0
58 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
59 NAME Ind II G 20 38.9 -46 10           ~ 31 0
60 NAME Laevens 3 GlC 21 06 54.3 +14 58 48           ~ 43 0
61 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
62 NAME Gru II G 22 04.1 -46 26           ~ 110 0
63 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
64 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
65 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
66 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
67 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
68 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
69 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
70 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
71 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
72 NAME Local Group GrG ~ ~           ~ 9325 0
73 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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