2018ApJ...864...16M

Query : 2018ApJ...864...16M

2018ApJ...864...16M - Astrophys. J., 864, 16-16 (2018/September-1)

A search for pulsars in steep spectrum radio sources.

MAAN Y., BASSA C., VAN LEEUWEN J., KRISHNAKUMAR M.A. and JOSHI B.C.

Abstract (from CDS):

We report on a time-domain search for pulsars in 44 steep spectrum radio sources originally identified from recent imaging surveys. The time-domain search was conducted at 327 MHz using the Ooty radio telescope, and utilized a semicoherent dedispersion scheme, retaining the sensitivity even for submillisecond periods up to reasonably high dispersion measures. No new pulsars were found. We discuss the nature of these steep spectrum sources and argue that the majority of the sources in our sample should either be pulsars or a new category of galactic sources. Several possibilities that could hinder detection of these sources as pulsars, including anomalously high scattering or alignment of the rotation and magnetic axes, are discussed in detail, and we suggest unconventional search methods to further probe these possibilities.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: general - methods: data analysis - methods: observational - pulsars: general - surveys

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 22

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Number of rows : 22
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 J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 365 2
2 PSR J0737-3039A Psr 07 37 51.24669 -30 39 40.6895           ~ 317 1
3 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
4 PSR J0815+4611 Psr 08 15 59.38 +46 11 51.0           ~ 17 0
5 PSR B0826-34 Psr 08 28 16.6 -34 17 07           ~ 167 0
6 PSR J1732-31 Psr 17 32 33.551 -31 31 20.85           ~ 78 0
7 PSR J1757-1854 Psr 17 57 03.78438 -18 54 03.3760           ~ 67 0
8 PSR J1820-30A Psr 18 23 40.4842 -30 21 39.920           ~ 168 1
9 PSR B1820-30B Psr 18 23 41.538 -30 21 41.70           ~ 50 0
10 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
11 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
12 PSR B1844-04 Psr 18 47 22.8222581784 -04 02 13.031112264           ~ 125 0
13 PSR J1906+0749 Psr 19 06 48.67 +07 46 28.6           ~ 172 1
14 PSR J1908+0734 Psr 19 08 17.010 +07 34 14.36           ~ 37 0
15 PSR B1919+21 Psr 19 21 44.815 +21 53 02.25           ~ 411 0
16 PSR B1937+21.4 Psr 19 39 38.560096 +21 34 59.13552           ~ 1142 0
17 4C 21.53W HII 19 39 40.0 +21 37 28           ~ 21 0
18 PSR J1946+2052 Psr 19 46 14.1438633037 +20 52 24.333605451           ~ 65 0
19 PSR B2002+31 Psr 20 04 52.286 +31 37 10.01           ~ 138 0
20 SNR G076.9+01.0 SNR 20 22 20.000 +38 43 00.00           ~ 64 0
21 PSR J2022+3842 Psr 20 22 21.689 +38 42 14.82           ~ 66 0
22 PSR B2111+46 Psr 21 13 24.3295 +46 44 08.844           ~ 226 1

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