Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
Artikel i vetenskaplig tidskrift, 2018

New radio (MeerKAT and Parkes) and X-ray (XMM-Newton, Swift, Chandra, and NuSTAR) observations of PSR J1622-4950 indicate that the magnetar, in a quiescent state since at least early 2015, reactivated between 2017 March 19 and April 5. The radio flux density, while variable, is approximately 100 larger than during its dormant state. The X-ray flux one month after reactivation was at least 800 larger than during quiescence, and has been decaying exponentially on a 111 19 day timescale. This high-flux state, together with a radio-derived rotational ephemeris, enabled for the first time the detection of X-ray pulsations for this magnetar. At 5%, the 0.3-6 keV pulsed fraction is comparable to the smallest observed for magnetars. The overall pulsar geometry inferred from polarized radio emission appears to be broadly consistent with that determined 6-8 years earlier. However, rotating vector model fits suggest that we are now seeing radio emission from a different location in the magnetosphere than previously. This indicates a novel way in which radio emission from magnetars can differ from that of ordinary pulsars. The torque on the neutron star is varying rapidly and unsteadily, as is common for magnetars following outburst, having changed by a factor of 7 within six months of reactivation.

pulsars: general

stars: neutron

stars: magnetars

pulsars: individual (PSR J16224950)

Författare

F. Camilo

SKA South Africa

P. Scholz

National Research Council Canada

M. Serylak

SKA South Africa

USN - Station de Radioastronomie de Nancay

University of the Western Cape

S. Buchner

SKA South Africa

M. Merryfield

National Research Council Canada

University of Victoria

V. M. Kaspi

McGill University

R. F. Archibald

McGill University

University of Toronto

M. Bailes

Swinburne University of Technology

A. Jameson

Swinburne University of Technology

W. Van Straten

Auckland University of Technology

Swinburne University of Technology

J. Sarkissian

CSIRO Parkes Observatory

J.E. Reynolds

Australia Telescope National Facility

S. Johnston

Australia Telescope National Facility

G. Hobbs

Australia Telescope National Facility

T. D. Abbott

SKA South Africa

R. M. Adam

SKA South Africa

G. B. Adams

SKA South Africa

T. Alberts

SKA South Africa

R. Andreas

SKA South Africa

K. M.B. Asad

SKA South Africa

Rhodes University

University of the Western Cape

D. E. Baker

Dirk Baker Consulting

T. Baloyi

SKA South Africa

E. F. Bauermeister

SKA South Africa

T. Baxana

SKA South Africa

T. G.H. Bennett

SKA South Africa

G. Bernardi

Istituto di Radioastronomia

Rhodes University

D. Booisen

SKA South Africa

Roy Booth

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Extragalaktisk astrofysik

D. H. Botha

EMSS Antennas

L. Boyana

SKA South Africa

L. R.S. Brederode

SKA South Africa

J. P. Burger

SKA South Africa

T. Cheetham

SKA South Africa

J. Conradie

EMSS Antennas

J. P. Conradie

EMSS Antennas

D. B. Davidson

Universiteit Stellenbosch

G. De Bruin

SKA South Africa

B. De Swardt

SKA South Africa

C. De Villiers

SKA South Africa

D. I.L.De Villiers

Universiteit Stellenbosch

M. S.De Villiers

SKA South Africa

W. De Villiers

EMSS Antennas

C. De Waal

SKA South Africa

M. A. Dikgale

SKA South Africa

G. Du Toit

EMSS Antennas

L. J.Du Toit

EMSS Antennas

S. W.P. Esterhuyse

SKA South Africa

B. Fanaroff

SKA South Africa

S. Fataar

SKA South Africa

A. R. Foley

SKA South Africa

G. Foster

University of California

University of Oxford

D. Fourie

SKA South Africa

R. Gamatham

SKA South Africa

T. Gatsi

SKA South Africa

R. Geschke

University of Cape Town

S. Goedhart

SKA South Africa

T. L. Grobler

Universiteit Stellenbosch

S. C. Gumede

SKA South Africa

M. J. Hlakola

SKA South Africa

A. Hokwana

SKA South Africa

D. H. Hoorn

SKA South Africa

D. Horn

SKA South Africa

J. Horrell

SKA South Africa

B. Hugo

Rhodes University

SKA South Africa

A. Isaacson

SKA South Africa

O. Jacobs

EMSS Antennas

J. P.Jansen Van Rensburg

EMSS Antennas

J. L. Jonas

Rhodes University

B. Jordaan

SKA South Africa

EMSS Antennas

A. Joubert

SKA South Africa

F. Joubert

SKA South Africa

G. I.G. Józsa

Argelander-Institut für Astronomie

SKA South Africa

Rhodes University

R. Julie

SKA South Africa

C. C. Julius

SKA South Africa

F. Kapp

SKA South Africa

A. Karastergiou

University of the Western Cape

Rhodes University

University of Oxford

F. Karels

SKA South Africa

M. Kariseb

SKA South Africa

R. Karuppusamy

Max Planck-institutet

V. Kasper

SKA South Africa

E. C. Knox-Davies

EMSS Antennas

D. Koch

SKA South Africa

P. P.A. Kotzé

SKA South Africa

A. Krebs

EMSS Antennas

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 856 180

Ämneskategorier

Meteorologi och atmosfärforskning

Astronomi, astrofysik och kosmologi

Fusion, plasma och rymdfysik

DOI

10.3847/1538-4357/aab35a