Table 3
Measured and derived parameters of two new MSPs.
| J1740-2805 | J1740-28 | |
|---|---|---|
| Right ascension, RA J(J2000) | 17:40:06.7763(10) | 17:39:58(5) |
| Declination, Dec J(J2000) | −28:05:33.34(19) | −28:07(5) |
| Spin frequency, ν (Hz) | 133.21629697909(18) | 64.909324(3) |
| Frequency derivative ν̇ (Hz/s) | −2.26(4) × 10−15 | −1.2(14) × 10−13 |
| Epoch of period (MJD) | 60438.606047113964 | 60418.530932677400 |
| Dispersion measure, DM (cm−3 pc) | 330 | 317 |
| Time span (MJD) | 60216.34-60753.80 | 60221.35-60753.74 |
| 1.28 GHz flux density (μJy) | 860±20 | – |
| Spectral index | −1.46±0.15 | – |
| Circular polarization fraction (V/I) | 0.3 | – |
| Binary parameters (ELL1 model; Lange et al. 2001) | ||
| Orbital period PB (day) | 0.48377932(3) | 190.60(7) |
| Projected semimajor axis, A1 (lt-s) | 0.24852(3) | 49.09(9) |
| Epoch of ascending node, TASC (MJD) | 60439.229880(8) | 59896.3(3) |
| EPS1, η (10−3) | 0.12(11) | −0.3(13) |
| EPS2, κ (10−3) | −0.01(8) | 0(3) |
| Min. and max. companion mass (M⊙) | 0.05, 0.12 | 0.20, 0.53 |
| Derived parameters | ||
| Spin period, P (ms) | 7.5065890786383 | 15.406107 |
| Period derivative, Ṗ (s s−1) | 1.26 × 10−19 | 2.9 × 10−17 |
| Characteristic age, τc (Gyr) | 0.947 | 0.0085 |
| Surface dipole magnetic field strength, Bs (G) | 9.83 × 108 | 2.1 × 1010 |
| YMW16 distance (kpc) | 5.29 | 7.01 |
| NE2001 distance (kpc) | 4.58 | 4.74 |
Notes. The binary model assumes a neutron star mass of 1.4 M⊙, and the minimum (maximum) companion mass corresponds to an inclination angle of 90° (26°). The flux density, spectral index and circular polarization fraction of PSR J1740-2805 are taken from Frail et al. (2024). We quote errors at a 95 percent confidence level.
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.