Table 1.
Main properties of the UCXBs included in this work. The sources are sorted by increasing orbital period.
| Source | P/Ta | Accretorb | Porb | NH | d |
|---|---|---|---|---|---|
| (min) | (1022 cm−2) | (kpc) | |||
| 4U 1820−303 | P | NS | 11.42 | 0.16 | 8.019 |
| 4U 1543−624 | P | NS | 18.2 | 0.35 | 9.2 |
| 47 Tuc X−9 | P | BH (?) | 28.18 | 0.013 | 4.521 |
| IGR J17062−6143 | P | NS (AMXP) | 37.9701 | 0.26 | 7.3 |
| 4U 1626−67 | P | NS | 41.538 | 0.13 | 8 |
| MAXI J0911−655 | T | NS (AMXP) | 44.332218 | 0.25 | 10.060 |
| IGR J16597−3704 | T | NS (AMXP) | 45.97 | 0.82 | 7.242 |
| 4U 1916−053 | P | NS | 49.75 | 0.55 | 7.6 |
| 4U 0614+091 | P | NS | 51.3 | 0.3 | 2.59 |
| Swift J1756.9−2508 | T | NS (AMXP) | 54.7017 | 8.14 | assumed 8 |
| IGR J17494−3030 | T | NS (AMXP) | 74.9445 | 1.87 | assumed 8 |
Notes. The values are taken from the catalog UltraCompCAT (Armas Padilla et al. 2023). The reported hydrongen density NH and distance d values are those assumed for the spectral analysis. aType of accretion: persistent (P) or transient (T). bNature of the accretor: neutron star (NS) or black hole (BH). If the NS is an accreting millisecond X-ray pulsar, AMXP is added. 47 Tuc X−9 has been suggested to host a black hole accretor (Bahramian et al. 2017).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.