The peculiar isolated neutron star in the Carina Nebula Deep XMM-Newton and ESO-VLT observations of 2XMM J104608.7-594306
The peculiar isolated neutron star in the Carina Nebula Deep XMM-Newton and ESO-VLT observations of 2XMM J104608.7-594306
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船底座星云深部 XMM-Newton 和 ESO-VLT 观测中 2XMM J104608 7-594306 中奇特的孤立中子星
DOI：
10.1051/0004-6361/201219161
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发表时间：
2012
影响因子：
6.5
通讯作者：
Janot-Pacheco
中科院分区：
文献类型：
--
作者：
Turolla;Schwope;Treves;Janot-Pacheco
虽然在数量上少于占主导地位的旋转动力射电脉冲星群体，但特殊类别的孤立中子星（INS）-包括磁星，ROSAT发现的“壮丽七”（M7），旋转射电瞬变（RRAT）和超新星遗迹（CCO）中的中心致密物体-代表了理解中子星星现象的关键要素。本文报道了一个新发现的热中子源2XMM J104608.7-594306的观测结果。利用XMM-牛顿天文台、欧洲南方天文台甚大望远镜以及费米空间望远镜和AGILE使命任务的γ射线数据，研究了中子星星的演化状态。观测结果证实了先前的预期，并揭示了一种独特的物体。该源可能位于船底座星云（NH= 2.6 × 1021 cm-2）内，其光谱既热又软，kT ∞= 135 eV。非热（磁层）发射在低于源亮度的1%（3σ，0.1-12 keV）时未被检测到。从一个简单的黑体模型的显着偏差（吸收功能）被确定在能量为0.6千电子伏和1.35千电子伏左右的源的光谱。虽然前者的偏差可能与船底座星云中局部的氧过剩有关，但后者只能由一个额外的光谱成分来解释，该光谱成分被模拟为吸收的高斯线，EW = 91 eV，σ= 0.14 keV（1σ）。此外，光学对应物比mV = 27（2σ）更暗，并且Fermior AGILE任务都没有显著地检测到γ射线发射。非常有趣的是，虽然这些特征与M7或迄今为止在X射线中检测到的唯一RRAT的特征非常相似，它们都具有几秒的旋转周期，但我们发现了非常快速旋转的有趣证据，P= 18.6 ms，在4σ置信水平。我们解释这些新的结果，根据目前已知的中子星星人口，特别是那些标准的旋转动力的恒星，回收的对象，和CCO的观察到的属性。我们发现，这些情况都不能令人满意地解释2XMM J104608.7-594306的集体性质，尽管它可能与仍然鲜为人知的银河系反磁星有关。为下一个观测周期（AO 11）提供的FutureXMM-Newtondata将帮助我们改进当前对源的观测解释，使我们能够显着限制脉冲星自转下降的速率。
While fewer in number than the dominant rotation-powered radio pulsar population, peculiar classes of isolated neutron stars (INSs) – which include magnetars, the ROSAT-discovered “Magnificent Seven” (M7), rotating radio transients (RRATs), and central compact objects in supernova remnants (CCOs) – represent a key element in understanding the neutron star phenomenology. We report the results of an observational campaign to study the properties of the source 2XMM J104608.7-594306, a newly discovered thermally emitting INS. The evolutionary state of the neutron star is investigated by means of deep dedicated observations obtained with theXMM-NewtonObservatory, the ESO Very Large Telescope, as well as publicly availableγ-ray data from theFermiSpace Telescope and the AGILE Mission. The observations confirm previous expectations and reveal a unique type of object. The source, which is likely within the Carina Nebula (NH= 2.6 × 1021cm-2), has a spectrum that is both thermal and soft, withkT∞= 135 eV. Non-thermal (magnetospheric) emission is not detected down to 1% (3σ, 0.1–12 keV) of the source luminosity. Significant deviations (absorption features) from a simple blackbody model are identified in the spectrum of the source around energies 0.6 keV and 1.35 keV. While the former deviation is likely related to a local oxygen overabundance in the Carina Nebula, the latter can only be accounted for by an additional spectral component, which is modelled as a Gaussian line in absorption withEW= 91 eV andσ= 0.14 keV (1σ). Furthermore, the optical counterpart is fainter thanmV= 27 (2σ) and noγ-ray emission is significantly detected by either theFermior AGILE missions. Very interestingly, while these characteristics are remarkably similar to those of the M7 or the only RRAT so far detected in X-rays, which all have spin periods of a few seconds, we found intriguing evidence of very rapid rotation,P= 18.6 ms, at the 4σconfidence level. We interpret these new results in the light of the observed properties of the currently known neutron star population, in particular those of standard rotation-powered pulsars, recycled objects, and CCOs. We find that none of these scenarios can satisfactorily explain the collective properties of 2XMM J104608.7-594306, although it may be related to the still poorly known class of Galactic anti-magnetars. FutureXMM-Newtondata, granted for the next cycle of observations (AO11), will help us to improve our currentobservational interpretation of the source, enabling us to significantly constrain the rate of pulsar spin down.
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ROSAT 亮源星表中检测到的孤立中子星数量的限制
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
R. Rutledge;D. Fox;M. Bogosavljević;A. Mahabal
通讯作者：
A. Mahabal
影响因子：
4.9
作者：
Atwood, W. B.;Abdo, A. A.;Ziegler, M.
通讯作者：
Ziegler, M.
在 2XMMp 目录中搜索热发射孤立中子星
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
A. Pires;C. Motch;Eduardo Janot;Strasbourg;France.;IAG;Brazil.
通讯作者：
Brazil.
SDSS 数据发布 4 中没有确认新的孤立中子星
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
M. Agüeros;B. Posselt;S. Anderson;P. Rosenfield;F. Haberl;L. Homer;B. Margon;Emily Newsom;W. Voges
通讯作者：
W. Voges
用钱德拉测量的热发射孤立中子星的自行
影响因子：
6.5
作者：
C. Motch;A. Pires;F. Haberl;A. Schwope;V. Zavlin
通讯作者：
V. Zavlin