Questions tagged [binary-star]
Questions regarding a pair of stars that are gravitationally bound and orbit around their barycenter.
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HR 6819 "Vampire" star - mass disparity in binary star system
Regarding the two B-type stars of the HR 6819 system, a recent news item (2 March 2022), European Southern Observatory researchers find 'vampire' star sucking outer layers of companion star states,
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Is Beta Lyrae still thought to be losing mass in a spiral outflow?
In the famous 1960 painting by Chesley Bonestell, Beta Lyrae is depicted with a glowing spiral trail of matter emanating from the binary stars. I'm wondering if that's still thought to be a ...
user24157
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Limb darkening coefficients for BRITE and Johnson:V passbands
Where to find limb darkening coefficients for BRITE and Johnson:V passbands, please? Do any tables exist or are there any relations for their guest? Many thanks
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How to determine the time of periastron passage (T) of a single lined spectroscopic binary?
I am working on finding spectroscopic elements of a single lined spectroscopic binary. All I have is irregularly spaced radial velocity data which needs to be phase folded to plot a velocity curve (RV ...
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Are there any binary red supergiants?
I wonder if we ever have identified or observed a pair of binary stars (red supergiants). And I also wonder what would happen if they exploded, (theoretically) as we haven’t observed it. Also, would ...
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How to distinguish primary hosts (stars) and orbiting satellites (planets) and tertiary bodies (moons) by their mass and trajectory?
Suppose one has run a gravitational simulation of N bodies (has the mass, vector positions, vector velocities, etc for each body), but knows nothing a priori about ...
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Combined mass of binary stars
This is Question 17 from USAAAO Practice Round 2015. The answer is D. It would be best if someone can detail out the workings.
In a nearby star system, two stars are seen to orbit each other every
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If a planet orbits an M-Star in an S-type orbit around a G star, what is the minimum distance from the G star that it could remain tidally locked?
I'm wondering how close a planet-M-dwarf system could orbit a G star and have the planet remain tidally locked to the M star. I'm curious, because I'm designing a habitable planet, and I want the ...
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How to calculate orbital velocity of binary star?
I am trying to simulate the Alpha Centauri AB System. I built the simulation, it works flawlessly when trying to simulate our solar system, and I am now trying to simulate the AB System. I found all ...
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Did Gaia DR3 help figure out whether Albireo is an optical double?
Based on the Wikipedia page of Albireo, Gaia DR2 had too much noise to determine whether the stars are physically associated or if they are just an optical double. Gaia DR3 was released last year. ...
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Virial theorem for a binary system
I am trying to derive the virial theorem but for two stars orbiting each other. I know the derivation for the general virial theorem with i particles but I am wondering if there is a quicker or more ...
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Spurious periods of stars
What exactly is meant by spurious periods of stars? E. Tanner writes in Spurious Periods in Spectroscopic Binaries in 1948
Furthermore: Can spurious periods be produced by aliasing, and how can they ...
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Relation between inner and outer eccentricities in a hierarchical triple star system
According to Table 3 of Sterzik & Tokovinin (2002), the inner eccentricity of a triple star system (i.e. the eccentricity of the inner binary) is, most of the times (70%), larger than the outer ...
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PHOEBE 2.2 Documentation, components and semi-major axis definitions
I'm looking at PHOEBE 2.2 Documentation, specifically at a tutorial about constraints
What are Constraints?
Constraints live in their own context of the Bundle, and many are created by default - ...
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Could an Applegate-like mechanism operate in AM CVn systems?
One of the controversies surrounding the detection of exoplanets around post-common envelope binaries is the possibility that the orbital period variations observed might be the result of the ...
user24157
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Depth of primary and secondary minimum in a light curve
How can I explain approximately the same depth of primary and secondary minimum in light curve?
I observe star HD 36486. I tried filters MOST and BRITE.
Is it related with photometric filter? When ...
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Modeling binary star using MESA
I'm trying to model a binary star using the MESA (Modules for Experiments in Stellar Astrophysics docs) code with an orbital period of 10 days with the scenario where mass transfers starts after the ...
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V magnitude of binary components
Which catalog provides visible magnitudes of binary components, please? How to find it, for instance, in VizieR, please? I have a list of binaries.
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Does latitude affect the sunset times between binary stars
Basically, if a binary system's stars sunset an hour apart at the equator, would they still set an hour apart in a much farther north latitude where the daylight lasts longer or is it still an hour ...
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Transit Timing Variation data for binaries
Where can I find transit timing variation data (TTV) for binaries, please? Is there any database? Thanks a lot.
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What happens if supernova undergoes in tightly close multi stars system
I do wonder in a tight or close orbital binary stars or multi stars system, if one stars undergoes supernova and that blast can lead another stars in the system to become supernova, too?
Is there ...
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Relationships between G magnitude, Johnson V magnitude, and spectral type of stars?
I'm simulating a population of binary stars for a summer research project. I'm adding uncertainties to my simulated observables such as angular position and radial (line of sight) velocity. I'm using ...
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How likely are triple planet systems?
Is it likely to ever discover three planets of similar mass revolving around a common barycenter, or would such a system be too unstable? Such triple planet system would look like a triangle once in a ...
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Visual binary star with circular apparent orbit
Does anyone know a good example of visual (or interferometric) binary star apparent orbit of which looks circular due to projection though in fact is markedly elliptical? I need that for teaching.
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What is the relation between between hardness ratio(HR) and spectral state of a X-ray binary star system?
When reading about hardness ratio, it shows that depending on the hardness ratio spectral states of a binary star can be divided into soft, hard states. So how the HR value changes with respect to the ...
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6th catalogue of orbits of visual binary stars
I wanted to download or access the US navy catalog " the sixth catalog of orbits of visual binaries". I have already tried USNO web site and vizier. but I couldn't see them there. The link was dead ...
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Binary stars and gas giant formation
Say there's a young s-type binary star system with 2 Sun-like stars. From what I understand for a stable orbit to be possible, a planet's farthest orbital point from its host star has to be around 1/5 ...
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Binary planet orbital distance
From reading various sources online, I see that some people talk about binary planets in very tight orbits (around 1 or 2 planet radii). I am wondering if it is possible for a binary planet (Double ...
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Derivation of a formula for the mass of a tidal bulge and tidal torque
I've been looking into the tidal mechanism for a binary star system and seem to have hit a brick wall. In the literature (see below), little explanation is given to justify the equations (9.60), (9.61)...
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How accurate are the new visualisations of V404 Cygni
A number of pictures and some animations similar to the ones below have had much press recently. Clearly the colours are artificial, but I wondered how accurately the represent the geometry of the ...
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Total angular momentum in system of binary brown dwarfs on wide orbit from primary star
I want to calculate the total angular momentum of a system in which two brown dwarfs are orbiting one another (P ~ 10 years), and this system is stably orbiting a third primary ZAMS star (P ~ $10^4$ ...
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The black hole binary that was detected by advanced LIGO - how do such hypergiant binaries form?
With today's announcement of the historic detection of gravitational waves from the merger of 36 solar mass and 29 solar mass black holes 1.3 billion light years away, one can not help but wonder how ...
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Accretion disk formation
Why a mass transfer in a binary star system, from the less dense star to the denser star forms an accretion disk? Why the material does not fall directly to the denserstar?
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2-body orbits expanding in nbody simulation?
Recently, I designed an n-body engine and tested it with a binary star system. After a minute of running, the orbit began noticeably expanding:
Why is it happening, and is this natural? The source ...
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Binary star system effects at the barycenter
I haven't been able to find anything on this so far. Using Alpha Centauri as the study, what events/effects ( if any ) would happen between the two stars? More specifically, between the gravitational ...
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