2018A&A...616A..23D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST03:14:15

2018A&A...616A..23D - Astronomy and Astrophysics, volume 616A, 23-23 (2018/8-1)

The evolving jet spectrum of the neutron star X-ray binary Aql X-1 in transitional states during its 2016 outburst.

DIAZ TRIGO M., ALTAMIRANO D., DINCER T., MILLER-JONES J.C.A., RUSSELL D.M., SANNA A., BAILYN C., LEWIS F., MIGLIARI S. and RAHOUI F.

Abstract (from CDS):

We report on quasi-simultaneous observations from radio to X-ray frequencies of the neutron star X-ray binary Aql X-1 over accretion state transitions during its 2016 outburst. All the observations show radio to millimetre spectra consistent with emission from a jet, with a spectral break from optically thick to optically thin synchrotron emission that decreases from ∼100GHz to <5.5GHz during the transition from a hard to a soft accretion state. The 5.5GHz radio flux density as the source reaches the soft state, 0.82±0.03mJy, is the highest recorded to date for this source. During the decay of the outburst, the jet spectral break is detected again at a frequency of ∼30-100GHz. The flux density is 0.75±0.03mJy at 97.5GHz at this stage. This is the first time that a change in the frequency of the jet break of a neutron star X-ray binary has been measured, indicating that the processes at play in black holes are also present in neutron stars, supporting the idea that the internal properties of the jet rely most critically on the conditions of the accretion disc and corona around the compact object, rather than the black hole mass or spin or the neutron star surface or magnetic field.

Abstract Copyright: © ESO 2018

Journal keyword(s): X-rays: binaries - ISM: jets and outflows - accretion, accretion disks - stars: neutron - X-rays: individuals: Aql X-1

Simbad objects: 14

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Number of rows : 14

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 MAXI J1659-152 LXB 16 59 01.680 -15 15 28.73           ~ 187 0
2 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1764 0
3 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5           ~ 758 1
4 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78 17.39 ~ 983 1
5 SWIFT J174510.8-262411 LXB 17 45 10.849 -26 24 12.60           ~ 58 0
6 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 811 1
7 MAXI J1836-194 XB* 18 35 43.440 -19 19 10.48           ~ 104 0
8 NVSS J185146+003532 Rad 18 51 46.72295 +00 35 32.3649           ~ 54 1
9 PSR B1849+00 Psr 18 52 27.42 +00 32 02.0           ~ 62 0
10 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 316 0
11 ICRF J190711.9+012708 QSO 19 07 11.9988607394 +01 27 09.018074966           ~ 30 1
12 X Aql X-1 LXB 19 11 16.0572031521 +00 35 05.876658556           ~ 1011 1
13 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 689 0
14 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 954 1

    Equat.    Gal    SGal    Ecl

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2020.07.10-03:14:15

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