Specific Systems

0 = Low mass MS (M<0.7 Msun) / 1 = MS (M>0.7 Msun)

2 = HG / 3 = GB

4 = CHeB / 5 = E-AGB

6 = TP-AGB / 7 = He_MS

8 = He-HG / 9 = He-GB

10 = HeWD / 11 = CO WD

12 = ONeWD / 13 = NS

14 = BH / 15 = massless remnant

Systems that form 1 WD ⇒ M1 vs. a

Systems are lost with initial mass between 9-10 Msun, a = 200 Rsun

-System below: BrB Ex: 9.7+7.4 Msun a = 49.5, per = 9.77

-System above: Br-Bc(B) Ex: 9.7+7.4 Msun a = 327.7, per = 166.4

-System in the region: Br (but star remains too massive) Ex: 9.7+7.4 Msun a = 233.4, per = 100

Systems that form 1 WD ⇒ Mwd1 vs. a

Case B systems, with Mwd1 = 0.4-0.5

-a ~ 200 Rsun Ex: 3+0.8 Msun a = 24 Rsun

general these systems: M1 = 2.7-3.15/ M2 = 0.7-1/ a = 10-30 Rsun/ per = 5-10 days

-a ~ 1 Rsun Ex: 3+1.1 Msun a = 20.9 Rsun, per = 5.4 days

general these systems: M1 = 2.7-3.15/ M2 = 1.1-1.6/ a = 10-30 Rsun/ per = 5-10 days

Secondary fills Roche lobe when primary still He-star. brings them in a closer orbit. And are in a close orbit when primary becomes a WD.

Case A systems

-a = 20-200 Rsun Ex: 3+2.2 Msun a = 10 Rsun

general these systems: M1 = 1-4/ M2 = 0.8-2.6/ a = 5-12 Rsun/ per = 0.8-2.1 days

-a = 0.1-1 Rsun Ex: 2+1.6 Msun a = 7.4 Rsun

general these systems: M1 = 1.4-3.4/ M2 = 1.1-2.4/ a = 7-10 Rsun/ per = 1.2-1.5 days

When primary fills its Roche lobe, secondary starts filling its as well ⇒ Contact systems ⇒ double spiral-in ⇒ primary: He WD, secondary: He-MS

Comparison with examples of the Brussels-group

Ex: 3.36+3.25 Msun per = 1.08 days

⇒ Also case A mass transfer, but results in a contact system (system does not survive)

Ex: 7.90+4.61 Msun per = 1.41 days

⇒ Also case A mass transfer, but coelescence (system does not survive), based on models De Mink +07

Ex: 9.95+8.87 Msun per = 82.3 days

⇒ Case B mass transfer. Primary becomes a NS

Ex: 5.96+4.93 Msun per = 381 days

⇒ Pirmary: Case C(B), Secondary: Case B (unstable): merge

Ex: 7.72+6.68 Msun per = 1740 days

⇒ Pirmary: Case C, Secondary: Case B (unstable): merge

Comparison with examples of the SeBa-group

Ex: 2.4+1.7 Msun per = 4.61 days

⇒ Case Br (P), case C (unstable): afterwards He-MS (P) and He-subgiant (S) in a close orbit. Secondary fill again Roche, which is unstable.⇒ WD. Primary fills Roche lobe stable ⇒ Merge : Semi-reversal

Ex: 2.6+1.5 Msun per = 4 days

⇒ Case Br (P), case C (unstable): afterwards He-MS (P) and He-subgiant (S) in a close orbit. Secondary fill again Roche, which is unstable. Merger.⇒ Semi-reversal

Ex: 6.35+4.0 Msun per = 25.9 days, a = 80

⇒ BrBr (last Br when He-giant) BcBc ⇒ Forms double WD systems

Ex: 1.35+1.18 Msun per = 1114 days, a = 616

⇒ C (unstable)- Bc: Forms COWD+ HeWD in a close orbit (falls below region of stable systems)

Ex: 6.6+3.7 Msun per = 35.6 days, a = 99

⇒ BrBr (last Br when He-giant) BcBc ⇒ Forms double WD systems

The 4 systems for the article (NEW)

System with evolution case Br

Diagram of evolution

System with evolution case BrB

Diagram of evolution

System with evolution case BcB

Diagram of evolution (Part A)

Diagram of evolution (Part B)

System with evolution case C

Diagram of evolution

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