2017ApJ...840..108K


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.09CEST20:29:11

2017ApJ...840..108K - Astrophys. J., 840, 108-108 (2017/May-2)

Gigahertz-peaked spectra pulsars and thermal absorption model.

KIJAK J., BASU R., LEWANDOWSKI W., ROZKO K. and DEMBSKA M.

Abstract (from CDS):

We present the results of our radio interferometric observations of pulsars at 325 and 610 MHz using the Giant Metrewave Radio Telescope. We used the imaging method to estimate the flux densities of several pulsars at these radio frequencies. The analysis of the shapes of the pulsar spectra allowed us to identify five new gigahertz-peaked spectra (GPS) pulsars. Using the hypothesis that the spectral turnovers are caused by thermal free-free absorption in the interstellar medium, we modeled the spectra of all known objects of this kind. Using the model, we were able to put some observational constraints on the physical parameters of the absorbing matter, which allows us to distinguish between the possible sources of absorption. We also discuss the possible effects of the existence of GPS pulsars on future search surveys, showing that the optimal frequency range for finding such objects would be from a few GHz (for regular GPS sources) to possibly 10 GHz for pulsars and radio magnetars exhibiting very strong absorption.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: general - ISM: supernova remnants - pulsars: general - stars: winds, outflows - stars: winds, outflows

Status at CDS:  

Simbad objects: 31

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Number of rows : 31

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2472 2
2 PSR B1054-62 Psr 10 56 25.55 -62 58 47.6           ~ 68 0
3 BRAN 328A HII 10 56 32.5 -63 00 46           ~ 20 0
4 CPD-63 2495 HXB 13 02 47.6541729595 -63 50 08.625922862 10.34 10.72 9.98 10.03   O9.5Ve 667 1
5 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3674 1
6 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 324 1
7 PSR J1622-4950 Psr 16 22 44.80 -49 50 54.4           ~ 97 0
8 PSR B1641-45 Psr 16 44 49.281 -45 59 09.50           ~ 174 0
9 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 457 0
10 PSR J1723-3659 Psr 17 23 07.580 -36 59 13.90           ~ 25 0
11 PSR J1740+1000 Psr 17 40 25.91 +10 00 06.0           ~ 51 0
12 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3369 3
13 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11336 0
14 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 211 0
15 PSR B1800-21 Psr 18 03 51.45 -21 37 08.1           ~ 229 1
16 PSR B1806-19.3 Psr 18 09 43.147 -19 17 38.10           ~ 69 1
17 PSR B1822-14 Psr 18 25 02.927 -14 46 52.60           ~ 65 0
18 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 349 1
19 PSR B1828-10 Psr 18 30 47.566 -10 59 27.90           ~ 136 1
20 PSR J1834-0731 Psr 18 34 16.0 -07 31 07           ~ 16 0
21 PSR J1834-0812 Psr 18 34 29.8 -08 12 00           ~ 2 0
22 PSR B1832-06 Psr 18 35 05.561 -06 43 06.40           ~ 46 0
23 PSR B1833-10.3 Psr 18 35 57.551 -10 20 04.80           ~ 17 0
24 PSR B1839-03.8 Psr 18 41 38.68 -03 48 42.6           ~ 20 0
25 PSR J1852-0635 Psr 18 52 57.4 -06 35 57           ~ 13 0
26 PSR J1856+0245 Psr 18 56 50.80 +02 45 50.2           ~ 24 0
27 PSR J1901+0510 Psr 19 01 57.9 +05 10 34           ~ 8 0
28 PSR B1904+06 Psr 19 06 35.244 +06 41 02.90           ~ 44 0
29 PSR J1907+09 Psr 19 07 22.441 +09 18 30.76           ~ 26 0
30 PSR J1916+07 Psr 19 16 51.5 +07 48 00           ~ 8 0
31 PSR J2007+2722 Psr 20 07.0 +27 22           ~ 12 0

    Equat.    Gal    SGal    Ecl

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2020.04.09-20:29:11

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