2025ApJ...982..132K

Query : 2025ApJ...982..132K

2025ApJ...982..132K - Astrophys. J., 982, 132 (2025/April-1)

A Multifrequency Census of 100 Pulsars below 100 MHz with LWA: A Systematic Study of Flux Density, Spectra, Timing, Dispersion, Polarization, and Its Variation from a Decade of Observations.

KUMAR P., TAYLOR G.B., STOVALL K., DOWELL J. and WHITE S.M.

Abstract (from CDS):

We present a census of 100 pulsars, the largest below 100 MHz, including 94 normal pulsars and six millisecond pulsars, with the Long Wavelength Array (LWA). Pulse profiles are detected across a range of frequencies from 26-88 MHz, including new narrowband profiles facilitating profile evolution studies, and breaks in pulsar spectra at low frequencies. We report mean flux density, spectral index, curvature, and low-frequency turnover-frequency measurements for 97 pulsars, including new measurements for 61 sources. Multifrequency profile widths are presented for all pulsars, including component spacing for 27 pulsars with two components. Polarized emission is detected from 27 of the sources (the largest sample at these frequencies) in multiple frequency bands, with one new detection. We also provide new timing solutions for five recently discovered pulsars. Low-frequency observations with the LWA are especially sensitive to propagation effects arising in the interstellar medium. We have made the most sensitive measurements of pulsar dispersion measures (DMs) and rotation measures, with median uncertainties of 2.9 × 10–4 pc cm–3 and 0.01 rad m–2, respectively, and can track their variations over almost a decade, along with other frequency-dependent effects. This allows for stringent limits on average magnetic fields, with no variations detected above ∼20 nG. Finally, the census yields some interesting phenomena in individual sources, including the detection of frequency- and time-dependent DM variations in B2217+47, and the detection of highly circularly polarized emission from J0051+0423.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Pulsars - Interstellar medium - Pulsar timing method - Interstellar scattering - Solar wind

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 105

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Number of rows : 105
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PSR J0030+0451 Psr 00 30 27.42348 +04 51 39.7144           ~ 596 1
2 PSR B0031-07 Psr 00 34 08.9100 -07 21 56.000           ~ 350 0
3 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 201 0
4 PSR J0051+0423 Psr 00 51 30.1 +04 22 49           ~ 24 0
5 PSR B0053+47 Psr 00 56 25.51 +47 56 10.5           ~ 36 0
6 PSR B0105+65 Psr 01 08 22.5049 +66 08 34.499           ~ 81 0
7 PSR B0136+57 Psr 01 39 19.744 +58 14 31.73     13.41     ~ 163 0
8 PSR B0138+59 Psr 01 41 39.938 +60 09 32.30     12.85     ~ 120 0
9 PSR B0149-16 Psr 01 52 10.85400 -16 37 53.6300           ~ 130 0
10 PSR J0242+62 Psr 02 42 40.020 +62 56 41.48           ~ 1 0
11 PSR B0301+19 Psr 03 04 33.115 +19 32 51.40           ~ 247 0
12 PSR B0320+39 Psr 03 23 26.6619 +39 44 52.403           ~ 139 0
13 PSR B0329+54 Psr 03 32 59.3370698592 +54 34 45.028206408           ~ 690 1
14 PSR B0355+54 Psr 03 58 53.7165 +54 13 13.727           ~ 465 1
15 PSR B0447-12 Psr 04 50 08.79030 -12 48 07.0880           ~ 68 0
16 PSR B0450-18 Psr 04 52 34.11900 -17 59 23.1500           ~ 203 1
17 PSR B0450+55 Psr 04 54 07.709 +55 43 41.51           ~ 174 0
18 PSR J0459-0210 Psr 04 59 51.941 -02 10 06.60   11.0 10.36     ~ 39 0
19 PSR B0525+21 Psr 05 28 52.308 +22 00 01.00     14.30     ~ 370 0
20 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
21 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
22 PSR J0611+30 Psr 06 11 00.4 +30 13 58           ~ 20 0
23 PSR J0613+3732 Psr 06 13 12.137 +37 31 38.53           ~ 19 0
24 PSR B0628-28 Psr 06 30 49.35000 -28 34 42.1000           ~ 313 1
25 PSR B0655+64 Psr 07 00 37.802 +64 18 11.20           ~ 250 1
26 PSR B0809+74 Psr 08 14 59.500 +74 29 05.70           ~ 425 0
27 PSR J0815+4611 Psr 08 15 59.38 +46 11 51.0           ~ 17 0
28 PSR B0818-13 Psr 08 20 26.40700 -13 50 56.3200           ~ 229 0
29 PSR J0823+0159 Psr 08 23 09.78731 +01 59 12.6003           DA 244 0
30 PSR B0823+26 Psr 08 26 51.5068 +26 37 21.297           ~ 541 1
31 PSR B0834+06 Psr 08 37 05.64620 +06 10 15.8700           ~ 472 0
32 PSR B0906-17 Psr 09 08 38.22700 -17 39 39.9000           ~ 100 0
33 PSR B0917+63 Psr 09 21 14.135 +62 54 13.91           ~ 42 0
34 PSR B0919+06 Psr 09 22 13.85000 +06 38 19.0000           ~ 329 1
35 PSR B0943+10 Psr 09 46 07.31 +09 51 57.3           ~ 364 1
36 PSR B0950+08 Psr 09 53 09.31210 +07 55 36.9000           ~ 806 2
37 PSR J1022+10 Psr 10 22 57.990 +10 01 52.92           ~ 279 2
38 PSR B1112+50 Psr 11 15 38.400 +50 30 12.29           ~ 154 0
39 PSR B1133+16 Psr 11 36 03.09460 +15 51 15.9000           ~ 715 0
40 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
41 PSR B1237+25 Psr 12 39 40.386 +24 53 49.87           ~ 497 1
42 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 546 1
43 PSR J1313+0931 Psr 13 13 23.0 +09 31 56           ~ 21 0
44 PSR B1322+83 Psr 13 21 45.6315 +83 23 39.432           ~ 70 0
45 PSR J1327+3423 Psr 13 27 07.54840 +34 23 37.6765           ~ 5 0
46 PSR J1400-1431 Psr 14 00 37.00370 -14 31 47.0422           ~ 49 0
47 PSR B1508+55 Psr 15 09 25.674 +55 31 32.90           ~ 322 1
48 PSR B1530+27 Psr 15 32 10.3646 +27 45 49.623           ~ 122 0
49 PSR B1540-06 Psr 15 43 30.1373 -06 20 45.332           ~ 131 1
50 PSR B1541+09 Psr 15 43 38.82000 +09 29 16.4000           ~ 215 1
51 PSR B1600-27 Psr 16 03 08.03600 -27 13 27.0000           ~ 53 0
52 PSR B1604-00 Psr 16 07 12.078 -00 32 40.98           ~ 228 1
53 PSR B1612+07 Psr 16 14 40.906 +07 37 31.00           ~ 101 0
54 PSR B1633+24 Psr 16 35 25.781 +24 18 47.30           ~ 74 0
55 PSR B1642-03 Psr 16 45 02.0330 -03 17 57.200           ~ 394 0
56 PSR J1645+1012 Psr 16 45 34.415 +10 12 16.04           ~ 20 0
57 PSR B1702-19 Psr 17 05 36.09300 -19 06 39.2000           ~ 191 1
58 PSR B1706-16 Psr 17 09 26.45200 -16 40 59.2000           ~ 247 0
59 PSR B1717-16 Psr 17 20 25.23000 -16 33 35.0000           ~ 41 0
60 PSR B1717-29 Psr 17 20 34.13100 -29 33 14.0000           ~ 80 0
61 PSR B1737+13 Psr 17 40 07.3455 +13 11 56.690           ~ 191 0
62 PSR J1741+2758 Psr 17 41 53.51 +27 58 09.0           ~ 26 0
63 PSR B1747-46 Psr 17 51 42.18500 -46 57 26.7200           ~ 124 0
64 PSR B1749-28 Psr 17 52 58.70700 -28 06 36.0000           ~ 277 1
65 PSR J1758+3030 Psr 17 58 25.88 +30 30 24.0           ~ 30 0
66 PSR B1821+05 Psr 18 23 30.9731 +05 50 24.310           ~ 136 0
67 PSR B1822-09 Psr 18 25 30.62000 -09 35 22.0000           ~ 382 0
68 PSR B1831-04 Psr 18 34 25.62100 -04 26 15.7000           ~ 103 0
69 PSR B1839+56 Psr 18 40 44.5372 +56 40 54.852           ~ 109 1
70 PSR B1842+14 Psr 18 44 54.8946 +14 54 14.120           ~ 127 0
71 PSR B1857-26 Psr 19 00 47.54200 -26 00 44.8000           ~ 195 1
72 PSR B1905+39 Psr 19 07 34.656 +40 02 05.71           ~ 93 0
73 PSR B1911-04 Psr 19 13 54.16240 -04 40 47.5600           ~ 192 0
74 PSR B1918+26 Psr 19 20 38.374 +26 50 38.40           ~ 40 0
75 PSR B1919+21 Psr 19 21 44.815 +21 53 02.25           ~ 411 0
76 PSR J1929+00 Psr 19 29 27.29 +00 31 23.0           ~ 8 0
77 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 801 0
78 PSR B1940-12 Psr 19 43 25.46100 -12 37 42.9000     13.76     ~ 69 0
79 PSR B1944+17 Psr 19 46 53.044 +18 05 41.24           ~ 252 0
80 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
81 PSR B2016+28 Psr 20 18 03.8999255016 +28 39 54.940329468           ~ 374 0
82 PSR B2020+28 Psr 20 22 37.0671 +28 54 23.104           ~ 330 1
83 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 288 1
84 PSR B2022+50 Psr 20 23 41.9427 +50 37 34.858           ~ 46 0
85 PSR J2043+2740 Psr 20 43 43.5 +27 40 56           ~ 137 0
86 PSR B2043-04 Psr 20 46 00.17600 -04 21 26.3000           ~ 87 0
87 PSR B2045-16 Psr 20 48 35.74000 -16 16 45.0000           ~ 344 0
88 PSR B2053+21 Psr 20 55 39.151 +22 09 27.22           ~ 55 0
89 PSR B2110+27 Psr 21 13 04.3506 +27 54 01.160           ~ 115 0
90 PSR B2145-07.8 Psr 21 45 50.45590 -07 50 18.5900           ~ 336 0
91 PSR B2152-31 Psr 21 55 13.64000 -31 18 53.8000           ~ 62 0
92 PSR B2154+40 Psr 21 57 01.840 +40 17 45.89           ~ 155 0
93 PSR J2208+4056 Psr 22 08 01.991 +40 56 01.80           ~ 24 0
94 PSR B2217+47 Psr 22 19 48.139 +47 54 53.93           ~ 230 0
95 PSR B2223+65 Psr 22 25 52.8627 +65 35 36.371           ~ 342 0
96 PSR J2227+30 Psr 22 27 41.73 +30 38 21.8           ~ 9 0
97 PSR J2234+2114 Psr 22 34 56.64 +21 14 18.8           ~ 27 0
98 PSR J2241-5236 Psr 22 41 42.03161 -52 36 36.2492           ~ 143 1
99 PSR B2303+30 Psr 23 05 58.3212 +31 00 01.281           ~ 216 0
100 PSR B2306+55 Psr 23 08 13.822 +55 47 36.03           ~ 70 0
101 PSR B2310+42 Psr 23 13 08.5976 +42 53 12.987           ~ 147 0
102 PSR B2315+21 Psr 23 17 57.8419 +21 49 48.019           ~ 119 0
103 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
104 PSR B2327-20 Psr 23 30 26.98600 -20 05 29.7500           ~ 133 0
105 PSR B2334+61 Psr 23 37 05.779 +61 51 01.69           ~ 206 1

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