Multiwavelength Characterization of the High-mass X-Ray Binary Population of M33
Multiwavelength Characterization of the High-mass X-Ray Binary Population of M33
复制标题
M33高质量X射线双星布居的多波长表征
DOI：
10.3847/1538-4357/acdbc8
复制
发表时间：
2023-05
期刊：
影响因子：
--
通讯作者：
M. Lazzarini;Kyros Hinton;Cheyanne Shariat;B. Williams;K. Garofali;J. Dalcanton;M. Durbin;V. Antoniou;B. Binder;M. Eracleous;N. Vulic;J. Yang;D. Wik;Aria Gasca;Quetzalcoatl Kuauhtzin
中科院分区：
文献类型：
--
作者：
M. Lazzarini;Kyros Hinton;Cheyanne Shariat;B. Williams;K. Garofali;J. Dalcanton;M. Durbin;V. Antoniou;B. Binder;M. Eracleous;N. Vulic;J. Yang;D. Wik;Aria Gasca;Quetzalcoatl Kuauhtzin
我们给出了M33中65个高质量X射线双星(HMXB)的多波长特征。我们使用Chandra ACIS调查M33(ChASeM33)星表来选择在空间上与全色哈勃仙女座金库：三角扩展区域星表中的紫外亮点源光学对应的硬X射线点源，该星表涵盖了M33的内盘在近红外、光学和近UV波长。我们对每个点源光学对应物进行多波段光谱能量分布拟合，测量其质量、温度、光度和半径等物理性质。我们发现大多数HMXB伴星候选星很可能是B型主序星，这表明M33的HMXB群是由Be X射线双星(Be-XRb)主导的，就像在其他局部群星系中看到的那样。我们使用空间分辨的M33新星形成历史图来测量HMXB候选样本的年龄分布和M33的HMXB产生率。我们发现在过去的80Myr期间，HMXB的产率呈双峰分布，在∼10Myr和∼40Myr处达到峰值，这分别与最大质量的HMXB和Be-XRb的理论形成时间尺度相匹配。我们测量了过去50年中的HMXB生产率为107-136HMXB/(M⊙yr−1)，以及过去80年中的150-199HMXB/(M⊙yr−1)。对于由重叠的NuSTAR观测得到的具有紧密目标分类的源，我们发现在黑洞HMXB中的巨星/超巨星伴星和在中子星HMXB中的主序伴星是首选的。
We present multiwavelength characterization of 65 high-mass X-ray binary (HMXB) candidates in M33. We use the Chandra ACIS survey of M33 (ChASeM33) catalog to select hard X-ray point sources that are spatially coincident with UV-bright point-source optical counterparts in the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region catalog, which covers the inner disk of M33 at near-IR, optical, and near-UV wavelengths. We perform spectral energy distribution fitting on multiband photometry for each point-source optical counterpart to measure its physical properties including mass, temperature, luminosity, and radius. We find that the majority of the HMXB companion star candidates are likely B-type main-sequence stars, suggesting that the HMXB population of M33 is dominated by Be X-ray binaries (Be-XRBs), as is seen in other Local Group galaxies. We use spatially resolved recent star formation history maps of M33 to measure the age distribution of the HMXB candidate sample and the HMXB production rate for M33. We find a bimodal distribution for the HMXB production rate over the last 80 Myr, with a peak at ∼10 and ∼40 Myr, which match theoretical formation timescales for the most massive HMXBs and Be-XRBs, respectively. We measure an HMXB production rate of 107–136 HMXBs/(M ⊙ yr−1) over the last 50 Myr and 150–199 HMXBs/(M ⊙ yr−1) over the last 80 Myr. For sources with compact object classifications from overlapping NuSTAR observations, we find a preference for giant/supergiant companion stars in black hole HMXBs and main-sequence companion stars in neutron star HMXBs.