MeerKAT discovery of 13 new pulsars in Omega Centauri-Reference-Cited by-同舟云学术

MeerKAT discovery of 13 new pulsars in Omega Centauri

Published:2023-01-09 Issue:3 Volume:520 Page:3847-3856
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Chen W¹^ORCID,Freire P C C¹^ORCID,Ridolfi A²¹^ORCID,Barr E D¹^ORCID,Stappers B³^ORCID,Kramer M¹³^ORCID,Possenti A²,Ransom S M⁴^ORCID,Levin L³,Breton R P³^ORCID,Burgay M²^ORCID,Camilo F⁵,Buchner S⁵^ORCID,Champion D J¹^ORCID,Abbate F¹^ORCID,Venkatraman Krishnan V¹,Padmanabh P V¹⁶⁷,Gautam T¹,Vleeschower L³,Geyer M⁵,Grießmeier J-M⁸⁹,Men Y P¹,Balakrishnan V¹^ORCID,Bezuidenhout M C³

Affiliation:

1. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, Germany

2. INAF – Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), Italy

3. Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester , Manchester M13 9PL, UK

4. National Radio Astronomy Observatory (NRAO) , 520 Edgemont Rd., Charlottesville, VA 22903, USA

5. South African Radio Astronomy Observatory (SARAO) , 2 Fir Street, Black River Park, Observatory, Cape Town 7925, South Africa

6. Max Planck Institute for Gravitational Physics (Albert Einstein Institute) , D-30167 Hannover, Germany

7. Leibniz Universität Hannover , D-30167 Hannover, Germany

8. LPC2E - Université d’Orléans / CNRS , F-45071 Orléans cedex 2, France

9. Observatoire Radioastronomique de Nançay (ORN), Observatoire de Paris, Université PSL , Univ Orléans, CNRS, F-18330 Nancay, France

Abstract

ABSTRACTThe most massive globular cluster in our Galaxy, Omega Centauri, is an interesting target for pulsar searches, because of its multiple stellar populations and the intriguing possibility that it was once the nucleus of a galaxy that was absorbed into the Milky Way. The recent discoveries of pulsars in this globular cluster and their association with known X-ray sources was a hint that, given the large number of known X-ray sources, there is a much larger undiscovered pulsar population. We used the superior sensitivity of the MeerKAT radio telescope to search for pulsars in Omega Centauri. In this paper, we present some of the first results of this survey, including the discovery of 13 new pulsars; the total number of known pulsars in this cluster currently stands at 18. At least half of them are in binary systems and preliminary orbital constraints suggest that most of the binaries have light companions. We also discuss the ratio between isolated and binaries pulsars, and how they were formed in this cluster.

Funder

Max-Planck-Gesellschaft

University of Manchester

INAF

Ministero degli Affari Esteri e della Cooperazione Internazionale

National Research Foundation

NSF

ERC

Horizon 2020

Publisher

Oxford University Press (OUP)

Subject