English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this work we focus on a group of Galactic double neutron star (DNS)systems with long orbital periods of $ \gtrsim 1$ day and low eccentricities of$\lesssim 0.4$. The feature of these orbital parameters is used to constrainthe evolutionary processes of progenitor binaries and the supernova (SN) kicksof the second born NSs. Adopting that the mass transfer during primordialbinary evolution is highly non-conservative (rotation-dependent), the formationof DNS systems involves a double helium star binary phase, the common envelope(CE) evolution initiates before the first NS formation. During the CE evolutionthe binary orbital energy is obviously larger when using a helium star ratherthan a NS to expel the donor envelope, this can help explain the formation ofDNS systems with long periods. SN kicks at NS birth can lead to eccentricorbits and even the disruption of binary systems, the low eccentricitiesrequire that the DNSs receive a small natal kick at the second collapse.Compared with the overall distribution of orbital parameters for observed DNSbinaries, we propose that the second born NSs in most DNS systems are subjectto small natal kicks with the Maxwellian dispersion velocity of less than $ 80\,\rm km\,s^{-1} $, which can provide some constraints on the SN explosionprocesses. The mass distribution of DNS binaries is also briefly discussed. Wesuggest that the rotation-dependent mass transfer mode and our results about SNkicks should be applied to massive binary evolution and population synthesisstudies.

On the role of supernova kicks in the formation of Galactic double neutron star systems