论文标题
使用HI吸收来测量与黑洞候选X射线二进制二进制Maxi J1348-630的距离
Measuring the distance to the black hole candidate X-ray binary MAXI J1348-630 using HI absorption
论文作者
论文摘要
我们使用澳大利亚平方公里阵列探路者（ASKAP）和Meerkat提出了黑洞候选X射线二进制二进制（XRB）Maxi J1348-630的HI吸收光谱。 ASKAP HI频谱显示出最大的负径向速度（相对于当地静止标准）的最大负径向速度为$ -31 \ pm4 $ km s $ s $^{ - 1} $对于Maxi J1348-630，而$ -50 \ pm4 $ $ km s $ s $ s $ s $ s $^{ - 1} $对于几个附近的杂货群中，这意味着最可能的$ 2.2^{+0.5} _ { - 0.6} $ kpc for Maxi J1348-630，切线点的强上限为$ 5.3 \ pm0.1 $ kpc。我们的首选距离意味着Maxi J1348-630达到了爆发峰值时的Eddington发光度的$ 17 \ pm10 $％，并且源从软X射线光谱状态转换为$ 2.5 \ pm1.5 $％。 Maxi J1348-630的Meerkat HI频谱（从较旧的低分辨率4K模式获得）与重新添加的ASKAP光谱一致，突出了Meerkat最终功能对于XRB光谱线研究的潜力。
We present HI absorption spectra of the black hole candidate X-ray binary (XRB) MAXI J1348-630 using the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT. The ASKAP HI spectrum shows a maximum negative radial velocity (with respect to the local standard of rest) of $-31\pm4$ km s$^{-1}$ for MAXI J1348-630, as compared to $-50\pm4$ km s$^{-1}$ for a stacked spectrum of several nearby extragalactic sources. This implies a most probable distance of $2.2^{+0.5}_{-0.6}$ kpc for MAXI J1348-630, and a strong upper limit of the tangent point distance at $5.3\pm0.1$ kpc. Our preferred distance implies that MAXI J1348-630 reached $17\pm10$ % of the Eddington luminosity at the peak of its outburst, and that the source transited from the soft to the hard X-ray spectral state at $2.5\pm1.5$ % of the Eddington luminosity. The MeerKAT HI spectrum of MAXI J1348-630 (obtained from the older, low-resolution 4k mode) is consistent with the re-binned ASKAP spectrum, highlighting the potential of the eventual capabilities of MeerKAT for XRB spectral line studies.
