Double Compact Objects: Local

All of the presented models and their properties are described in Dominik et al. 2012

The naming of the files is as follows: submodel (A/B)_DCO type (NSNS/BHNS/BHBH). metallicity . dat. For example should you wish to view BHNS systems from submodel B for solar metallicity, you should choose the file: B_BHNS.02.dat. Each line contains information on one DCO. The format of the files is as follows:

Ma Mb a e per Mchirp tdel tmer tms Vsm0,x Vsm0,y Vsm0,z Vsm,x Vsm,y Vsm,z Mzamsa Mzamsb a0 e0 k evol_hist

• - Ma is the mass of the primary component - initially (at Zero Age Main Sequence) more massive, in units of M☉.
• - Mb is the mass of the secondary component - initially (at ZAMS) less massive, in units of M☉.
• - a is the semi-major axis of the system at the formation of the second compact object (supernova included) in units of R☉.
• - e is the eccentricity of the system at the formation of the second compact object (supernova included).
• - per is the orbital period at the formation of the second compact object (supernova included) in days.
• - Mchirp is the chirp mass of the DCO system, in units of M☉.
• - tdel is the delay time of the DCO system, in units of Myr. The delay times is the sum of: the time to the formation of the last compact object measured from ZAMS, and the time to merger measured from the formation of the last compact object.
• - tmer is the merger time of the DCO system in units of Myr. It is measured from the formation of the second compact object until the merger.
• - tms is the time between supernova explosions in units of Myr.
• - Vsm0,i are the components of the velocity, of the center of mass after the first supernova. Units are R☉ day^-1.
• - Vsm,i are the components of the velocity, of the center of mass after the second supernova. Units are R☉ day^-1.
• - Mzamsa is the initial mass of the primary component, in units of M☉.
• - Mzamsb is the initial mass of the secondary component, in units of M☉.
• - a0 is the initial (at ZAMS) separation (semi-major axis) of the components, in units of in units of R☉.
• - e0 is the initial (at ZAMS) eccentricity of the binary.
• - k is an integer number of following string in the line, describing the evolutionary history of the system.
• - evol_hist is the evolutionary history of the system, presented in k number of strings. For example, a system with only two supernovae in its history will have the follwing k and evol_hist in its line: 2 SN1 SN2.

Here is the list of events (strings) used by StarTrack to describe evolutionary history:
MTx - stands for nonconservative mass transfer through Roche lobe overflow. "x" indicates the relative component: 1-primary, 2-secondary.
SNx - stands for a supernovae explosion.
CEx(a0-b0:a1-b1) - stands for a common envelope events. "x" indicates the donor star: 1-primary, 2-secondary or 12-both components are donors. "a0-b0" are integer numbers indicating stellar types (explained below) of the primary-secondary components, respectively, at the start of the CE. Analogously "a1-b1" indicate stellar types at the outcome of the CE. For example "CE2(14-2:14-7)" means that a CE was initiated by the secondary component ("CE2"), which was a Hertzsprung gap star ("-2:"), onto the primary, which was a black hole ("14-"). In the outcome, the secondary ejected its hydrogen envelope and became a Wolf-Rayet star ("-7"), while the primary remained a black hole (":14-").
AICtypex indicates an accretion induced core collapse. "type" describes the compact object to which the progenitor has collapsed and "x" - the relevant component: 1-primary, 2-secondary. For example "AICNS1" means that the accreting primary star ("1") has collapsed into a neutron star ("NS").

List of stellar types:

• 0 - main sequence star with M<=0.7 M☉ (deeply or fully convective)
• 1 - main sequence star with M>0.7 M☉
• 2 - Hertzsprung gap star
• 3 - first giant brach star
• 4 - core helium burning star
• 5 - early asymptotic giant branch star
• 6 - thermally pulsing asymptotic giant branch star
• 7 - main sequence naked helium star (Wolf-Rayet star)
• 8 - Hertzsprung gap naked helium star
• 9 - giant branch naked helium star
• 10 - helium white dwarf
• 11 - carbon/oxygen white dwarf
• 12 - oxygen/neon white dwarf
• 13 - neutron star
• 14 - black hole