First detection of polarization in X-rays for PSR B0540-69 and its nebula

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00583015" target="_blank" >RIV/67985815:_____/24:00583015 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0353709" target="_blank" >https://hdl.handle.net/11104/0353709</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad17ba" target="_blank" >10.3847/1538-4357/ad17ba</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First detection of polarization in X-rays for PSR B0540-69 and its nebula

Popis výsledku v původním jazyce

We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a similar to 850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically significant polarization is detected for the image-averaged data, giving a 99% confidence polarization upper limit (MDP99) of 5.3% in the 2-8 keV energy range. However, a phase-resolved analysis detects polarization for both the nebula and pulsar in the 4-6 keV energy range. For the PWN defined as the off-pulse phases, the polarization degree (PD) of (24.5 +/- 5.3)% and polarization angle (PA) of (78.1 +/- 6.2)degrees is detected at 4.6 sigma significance level, consistent with the PA observed in the optical band. In a single on-pulse window, a hint of polarization is measured at 3.8 sigma with PD of (50.0 +/- 13.1)% and PA of (6.2 +/- 7.4)degrees. A simultaneous PSR/PWN analysis finds two bins at the edges of the pulse exceeding 3 sigma PD significance, with PD of (68 +/- 20)% and (62 +/- 20)%, intervening bins at 2-3 sigma significance have lower PD, hinting at additional polarization structure.

Název v anglickém jazyce

First detection of polarization in X-rays for PSR B0540-69 and its nebula

Popis výsledku anglicky

We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a similar to 850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically significant polarization is detected for the image-averaged data, giving a 99% confidence polarization upper limit (MDP99) of 5.3% in the 2-8 keV energy range. However, a phase-resolved analysis detects polarization for both the nebula and pulsar in the 4-6 keV energy range. For the PWN defined as the off-pulse phases, the polarization degree (PD) of (24.5 +/- 5.3)% and polarization angle (PA) of (78.1 +/- 6.2)degrees is detected at 4.6 sigma significance level, consistent with the PA observed in the optical band. In a single on-pulse window, a hint of polarization is measured at 3.8 sigma with PD of (50.0 +/- 13.1)% and PA of (6.2 +/- 7.4)degrees. A simultaneous PSR/PWN analysis finds two bins at the edges of the pulse exceeding 3 sigma PD significance, with PD of (68 +/- 20)% and (62 +/- 20)%, intervening bins at 2-3 sigma significance have lower PD, hinting at additional polarization structure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

962

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

92

Kód UT WoS článku

001159833100001

EID výsledku v databázi Scopus

2-s2.0-85185921675