2025ApJ...992..105B

Query : 2025ApJ...992..105B

2025ApJ...992..105B - Astrophys. J., 992, 105 (2025/October-2)

Characterizing the Nature of Periodic Amplitude Modulation in Pulsars.

BASU R., MITRA D. and MELIKIDZE G.I.

Abstract (from CDS):

In recent years, periodic amplitude modulation has emerged as a unique emission feature in the single-pulse sequence of pulsars alongside periodic nulling and subpulse drifting. Despite ample evidence for the uniqueness of this phenomenon, the periodic modulation in several pulsars are often confused with subpulse drifting, primarily due to lack of clear characterization of the emission features from a representative sample of pulsars. In this work, we present a detailed analysis of the single-pulse behavior from 17 pulsars exhibiting periodic amplitude modulation, 6 of them being new detections. The pulsar switches between different intensity states as a result of periodic amplitude modulation, and we propose a novel statistical scheme to identify these emission states. The periodic modulation can be divided into three broad categories: phase stationary modulation, modulations with phase shift, and intermittent periodic modulations. The phase stationary behavior is seen when the emission intensity across a major part of the pulse window changes periodically. The phase shifts are associated with intensity changes at specific locations within the emission window in a periodic manner, while in some pulsars, the periodic modulations become more prominent only at specific intervals resulting in intermittent behavior.

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

Journal keyword(s): Radio pulsars

Simbad objects: 41

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Number of rows : 41
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 B0136+57 Psr 01 39 19.744 +58 14 31.73     13.41     ~ 163 0
2 PSR B0329+54 Psr 03 32 59.3370698592 +54 34 45.028206408           ~ 690 1
3 PSR B0450-18 Psr 04 52 34.11900 -17 59 23.1500           ~ 203 1
4 PSR B0450+55 Psr 04 54 07.709 +55 43 41.51           ~ 174 0
5 PSR J0621+10 Psr 06 21 22.11108 +10 02 38.7410           ~ 128 1
6 PSR B0823+26 Psr 08 26 51.5068 +26 37 21.297           ~ 541 1
7 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1
8 PSR B0844-35 Psr 08 46 06.07120 -35 33 40.9100           ~ 89 0
9 PSR B0905-51 Psr 09 07 15.90100 -51 57 59.3600           ~ 82 0
10 PSR B1046-58 Psr 10 48 13.10000 -58 32 03.0000           ~ 293 0
11 PSR B1054-62 Psr 10 56 25.5840 -62 58 47.690           ~ 94 0
12 PSR B1112-60 Psr 11 14 22.69000 -61 00 32.1000           ~ 37 0
13 PSR J1239+0326 Psr 12 39 39 +03 26.2           ~ 3 0
14 PSR B1237+25 Psr 12 39 40.386 +24 53 49.87           ~ 497 1
15 PSR J1350-5115 Psr 13 50 16.15900 -51 15 24.5600           ~ 12 0
16 PSR J1524-5706 Psr 15 24 21.43 -57 06 35.0           ~ 28 0
17 PSR B1541+09 Psr 15 43 38.82000 +09 29 16.4000           ~ 215 1
18 PSR B1600-49 Psr 16 04 22.9760 -49 09 57.980     13.00     ~ 83 0
19 PSR B1604-00 Psr 16 07 12.078 -00 32 40.98           ~ 228 1
20 PSR B1642-03 Psr 16 45 02.0330 -03 17 57.200           ~ 394 0
21 PSR B1718-32 Psr 17 22 02.96410 -32 07 45.0700           ~ 101 0
22 PSR B1730-37 Psr 17 33 26.754 -37 16 54.60           ~ 54 0
23 PSR B1732-07 Psr 17 35 04.9730 -07 24 52.130           ~ 74 0
24 PSR B1737+13 Psr 17 40 07.3455 +13 11 56.690           ~ 191 0
25 PSR B1737-39 Psr 17 41 18.07900 -39 27 38.1200           ~ 78 0
26 PSR B1758-29 Psr 18 01 46.83900 -29 20 38.1000           ~ 53 0
27 PSR B1822-09 Psr 18 25 30.62000 -09 35 22.0000           ~ 382 0
28 PSR J1841-0500 Psr 18 41 18.14 -05 00 19.5           ~ 54 0
29 PSR B1857-26 Psr 19 00 47.54200 -26 00 44.8000           ~ 195 1
30 PSR B1916+14 Psr 19 18 23.638 +14 45 06.00           ~ 130 0
31 PSR B1917+00 Psr 19 19 50.67000 +00 21 39.8000           ~ 120 0
32 PSR B1919+14 Psr 19 21 24.159 +14 19 17.10           ~ 78 0
33 PSR B1930+20 Psr 19 32 08.023 +20 20 46.41           ~ 87 0
34 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 801 0
35 PSR B1933+16 Psr 19 35 47.7011639352 +16 16 40.034899524           ~ 328 1
36 PSR B1946+35 Psr 19 48 25.0067 +35 40 11.057           ~ 180 0
37 PSR B2000+40 Psr 20 02 44.030 +40 50 53.91           ~ 53 0
38 PSR B2011+38 Psr 20 13 10.367 +38 45 43.31           ~ 78 0
39 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 288 1
40 PSR B2148+52 Psr 21 50 37.7499 +52 47 49.556           ~ 46 0
41 PSR B2334+61 Psr 23 37 05.779 +61 51 01.69           ~ 206 1

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