论文标题
与Gran Telescopio Canarias一起寻找四个二进制二进制脉冲星的光学伴侣
Searching for optical companions to four binary millisecond pulsars with the Gran Telescopio Canarias
论文作者
论文摘要
我们报告了带有Gran tleescopio canarias的四个二元脉冲星的多波段光度观测值。观察结果导致在Sloan G'，r'和I'乐队中发现PSRS J1630+3734，J1741+1351和J2042+0246的二元同伴。他们在R'乐队中的幅度分别为$ \ $ 24.4、24.4和24.0。我们还将PSR J0557+1550伴侣的亮度设置为3 $σ$上限，$ \ $ \ $ \ $ 25.6 mag。将光学数据与无线电定时测量和白色矮人冷却模型相结合，我们表明，检测到的同伴是凉爽的低质量白色矮人，其温度和年龄在（4-7）$ 10^3 $ k和2-5 Gyr的相应范围内。发现所有检测到的白矮人都可能具有纯氢或混合氦气含量。
We report on multi-band photometric observations of four binary millisecond pulsars with the Gran Telescopio Canarias. The observations led to detection of binary companions to PSRs J1630+3734, J1741+1351 and J2042+0246 in the Sloan g', r' and i' bands. Their magnitudes in the r' band are $\approx$24.4, 24.4 and 24.0, respectively. We also set a 3$σ$ upper limit on the brightness of the PSR J0557+1550 companion in the r' band of $\approx$25.6 mag. Combining the optical data with the radio timing measurements and white dwarf cooling models, we show that the detected companions are cool low-mass white dwarfs with temperatures and ages in the respective ranges of (4-7)$\times 10^3$ K and 2-5 Gyr. All the detected white dwarfs are found to likely have either pure hydrogen or mixed helium-hydrogen atmospheres.
