2024ApJ...961...36D

Query : 2024ApJ...961...36D

2024ApJ...961...36D - Astrophys. J., 961, 36 (2024/January-3)

A Markedly Expanded Sample of Candidate X-Ray-emitting Isolated Neutron Stars.

DEMASI S., ANDERSON S.F. and AGUEROS M.A.

Abstract (from CDS):

The current sample of 12 radio-quiet isolated neutron stars that emit strongly in X-rays (XINSs) is both small and heterogeneous, limiting its usefulness for understanding the physics of neutron star atmospheres and cooling rates and for constraining the equation of state of neutron degenerate matter. Utilizing the ROSAT 1RXS and 2RXS data sets, in conjunction with the Sloan Digital Sky Survey Data Release 17 and other companion multiwavelength surveys, we have extended previous searches for blank-field X-ray source candidate XINSs, ultimately recovering two known XINSs while identifying 46 new, unstudied candidate fields devoid of likely multiwavelength counterparts. In this publication, we describe our selection approach and provide detailed information regarding our sample of new candidate XINSs. Future opportunities to verify or to refute these X-ray sources as isolated neutron stars by obtaining more accurate X-ray source positions, quality X-ray spectra, or deeper optical imaging are also discussed.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Neutron stars - X-ray surveys

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

Simbad objects: 14

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Number of rows : 14
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 1RXS J001523.5+080250 X 00 15 23.50 +08 02 50.5           ~ 1 0
2 4XMM J022141.5-735632 N* 02 21 41.542 -73 56 32.02           ~ 4 0
3 RX J0420.0-5022 N* 04 20 02.2 -50 22 46     25.5     ~ 98 0
4 PSR J0657+2604 Psr 06 57 15.321 +26 04 30.00           ~ 5 0
5 RX J0720.4-3125 N* 07 20 24.961 -31 25 50.21   26.1   27.0   ~ 316 0
6 RX J0806.4-4123 N* 08 06 23.0 -41 22 33           ~ 87 0
7 CXOGNC J104608.71-594306.4 N* 10 46 08.719 -59 43 06.48           ~ 23 0
8 RBS 1223 N* 13 08 48.7 +21 27 08   28.6 28.6     ~ 163 1
9 eRASSU J131716.9-402647 N* 13 17 16.9 -40 26 46           ~ 6 0
10 NAME Calvera N* 14 12 56.126 +79 22 03.54           ~ 47 0
11 1RXS J141428.5+601707 X 14 14 28.5 +60 17 07           ~ 3 0
12 RBS 1556 N* 16 05 18.9 +32 49 07     26.8     ~ 105 1
13 RX J1856.6-3754 Psr 18 56 35.11 -37 54 30.5     25.7     ~ 456 0
14 RBS 1774 N* 21 43 03.8 +06 54 20           ~ 82 0

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