2025ApJ...989..202E

Query : 2025ApJ...989..202E

2025ApJ...989..202E - Astrophys. J., 989, 202 (2025/August-3)

A NuSTAR Study of Quasiperiodic Oscillations from the Ultraluminous X-Ray Sources in M82.

EL BYAD H., BACHETTI M., COLUMBU S., RODRIGUEZ G., PILIA M., MIDDLETON M.J., WALTON D.J., BRIGHTMAN M., EARNSHAW H., FORSTER K., GREFENSTETTE B., FURST F., HEIDA M., IMBROGNO M., LAI E.V. and MACCARONE T.

Abstract (from CDS):

The study of quasiperiodic oscillations (QPOs) in X-ray binaries provides valuable insights into the physics of accretion around compact objects. The M82 galaxy hosts multiple ultraluminous X-ray sources, including two prominent ones-X-1 and X-2-where X-1 is suspected to harbor an intermediate-mass black hole. In this work, we analyze data from 39 NuSTAR observations acquired between 2014 and 2024 to investigate the aperiodic X-ray variability in M82. In particular, we study in detail the evolution of the QPOs from M82 X-1 in the range 20-300 mHz. We do not find additional timing features in the data, besides a frequently present broad noise component at lower frequencies. The QPO behaves similarly to other classes of low-frequency oscillations in accreting compact objects, both black holes and neutron stars.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Ultraluminous x-ray sources - X-ray binary stars - X-ray astronomy - Compact objects - Accretion - Time domain astronomy

Simbad objects: 15

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Number of rows : 15
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 V* BQ Cam HXB 03 34 59.9116110096 +53 10 23.296879776   17.16 15.42 14.26 13.04 O8.5Ve 525 1
2 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
3 2CXO J095550.1+694046 HXB 09 55 50.12 +69 40 46.4           ~ 294 1
4 CXOU J095550.6+694944 X 09 55 50.6 +69 49 44           ~ 3 0
5 [KCF2005] M82 G ULX 09 55 51.040 +69 40 45.49           ~ 284 1
6 CXOU J095551.3+694043 HXB 09 55 51.2 +69 40 44           ~ 6 0
7 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
8 MCG+12-10-012 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 327 4
9 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 246 4
10 RX J133001+47137 UX? 13 30 01.01 +47 13 43.9           ~ 108 0
11 NAME NGC 5907 ULX ULX 15 15 58.60 +56 18 10.0           ~ 180 0
12 V* V381 Nor HXB 15 50 58.6637920704 -56 28 35.258385000           K3III 1254 0
13 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
14 IGR J17091-3624 LXB 17 09 07.61 -36 24 25.7           ~ 320 1
15 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0

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