2015A&A...579A..22D


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.20CET08:59:46

2015A&A...579A..22D - Astronomy and Astrophysics, volume 579A, 22-22 (2015/7-1)

Searching for coherent pulsations in ultraluminous X-ray sources.

DOROSHENKO V., SANTANGELO A. and DUCCI L.

Abstract (from CDS):

Luminosities of ultraluminous X-ray sources (ULXs) are uncomfortably large when compared to the Eddington limit for isotropic accretion onto stellar-mass object. Most often either supercritical accretion onto stellar mass black holes or accretion onto intermediate mass black holes is invoked the high luminosities of ULXs. However, the recent discovery of coherent pulsations from ULX M82 X-1 with NuStar has shown that another scenario implying accretion onto a magnetized neutron star is possible for ULXs. Motivated by this discovery, we re-visited the available XMM-Newton archival observations of several bright ULXs with a targeted search for pulsations to check whether accreting neutron stars might power other ULXs as well. We have found no evidence for significant coherent pulsations in any of the sources including the M82 X-2. We provide upper limits for the amplitude of possibly undetected pulsed signals for the sources in the sample.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: galaxies - stars: neutron - stars: black holes

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [BWE2015] NGC 55 119 ULX 00 15 28.89 -39 13 18.8           ~ 35 0
2 RX J004732.9-251748 ULX 00 47 32.97 -25 17 50.2           ~ 32 0
3 RX J031820.3-662911 UX? 03 18 20.00 -66 29 10.9           ~ 164 1
4 [LB2005] NGC 2403 X1 X 07 36 56.05 +65 35 38.6           ~ 3 0
5 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 151 2
6 NAME M82 ULX-1 UX? 09 55 50.01 +69 40 46.0           ~ 234 1
7 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5224 6
8 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 191 4
9 [LB2005] NGC 3628 X1 X 11 20 15.43 +13 35 19.8           ~ 2 0
10 NGC 4395 Sy2 12 25 48.8639154223 +33 32 48.694684028 10.84 10.54 10.11 9.98   ~ 957 1
11 RX J123558+27577 UX? 12 35 58.56 +27 57 41.9           ~ 34 2
12 IXO 72 X 12 59 00.9 +34 50 42           ~ 6 1
13 NAME NGC 4945 X-1 X 13 05 22.6 -49 29 09           ~ 3 0
14 [FK2005] 23 ULX 13 29 38.62 +58 25 05.6           ~ 107 2
15 CXOU J133705.1-295207 ULX 13 37 05.13 -29 52 07.1           ~ 11 0
16 [FK2005] 25 ULX 14 03 19.63 -41 22 58.7           ~ 189 0
17 SS 433 HXB 19 11 49.5645897701 +04 58 57.824087535   16.3 13.0     A7Ib: 1898 3

    Equat.    Gal    SGal    Ecl

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2019.11.20-08:59:46

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