Questions tagged [eclipsing-star-systems]

Questions regarding a binary (or more) star system where one star eclipses another, causing a dip in brightness.

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Binaries: mass and distance constraints

How does distance constrain the mass of the binary, please? Let us assume data like radial velocity, light curves, and astrometry. Is there any problem in the determination of the mass of the system ...
Anna-Kat's user avatar
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2 votes
2 answers
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What determines how accurate a particular method is at finding the period between Lomb-Scargle and String Length Minimization?

I've been using the Lomb-Scargle and String Length Minimization methods to find the periods of various astronomical objects with unevenly spaced data. I wanted to see if I could find any patterns ...
Zachary Kennedy's user avatar
3 votes
2 answers
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What is the v sin i parameter?

In the August 2021 preprint by WeiJia Sun et al. Exploring the stellar rotation of early-type stars in the LAMOST Medium-Resolution Survey. II. Statistics there is histogram plot with the caption: v ...
Elena Greg's user avatar
2 votes
1 answer
293 views

Orbital speeds of Components of Binary System

How does one calculate the orbital speed s of the members of a binary system? Iirc, the average separation of Alpha Centauri A and B is 23 AU, but the orbit is highly elliptical, so that the ...
Mike Stone's user avatar
4 votes
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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
Carly's user avatar
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How to phase fold data when periodicity change is known as d$\omega$/d$t$?

How can I obtain a phase-folded phase - velocity diagramme from a time series of radial velocity data when it is known that the periodicity changes as $\frac{{d}\omega}{{d}t}$? Without $\frac{{d}\...
Carly's user avatar
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3 votes
2 answers
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How can eclipsing binaries be used to gauge distances?

I understand that we can infer much about the parameters, such as the radius and mass, of stars in eclipsing binary systems. But how can eclipsing binaries be used to gauge distances? The current ...
WPWPWP's user avatar
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Eclipsing binaries - definition with inclination

What is the definition of eclipsing binaries based on the inclination of their orbit and the sum of relative radii? Are close eclipsing binaries defined by an inclination greater than 60 degrees?
Anna-Kat's user avatar
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Determining masses from radial velocity curves of eclipsing binaries

Is the statement From radial velocities or astrometry for eclipsing binaries, one obtains masses. wrong, because only minimal masses can be obtained?
Anna-Kat's user avatar
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2 answers
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Semimajor axes data from Kepler Eclipsing Binary Catalog

I have been searching for a massive binary (>7 M$_{\odot}$) catalog with semimajor axes given, but I wasn't able to find any, and I began to search for a binary star catalog and decided to filter ...
AstroTeen's user avatar
2 votes
1 answer
163 views

How to determine temperatures for a binary system?

How to make a guess for temperatures of an eclipsing binary from light curves measured in UBVR filters of the Johnson system? I assume that differences of indexes U, B, V will be necessary, right? ...
Elisabeth's user avatar
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How is phase defined in a binary orbit with eccentricity?

Are orbital phases of the black spot in the figure measured from some angle or time/period? Usually, how is phase=0 defined? It is relative to the line of apses perhaps with phase=0 at periastron? Any ...
questionhang's user avatar
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Are astronomers still using photomultiplier tubes for optical photometry?

In Time domain astronomy and fastest eclipsing binary ZTF J1539+5027 (+20 mag, 6.91 minutes) How to measure it's minimum brightness? I've written A logarithmic magnitude scale might tend to show ...
uhoh's user avatar
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3 votes
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Time domain astronomy and fastest eclipsing binary ZTF J1539+5027 (+20 mag, 6.91 minutes): How to measure its minimum brightness?

Per Wikipedia's ZTF J153932.16+502738.8 ZTF J153932.16+502738.8 is a double binary white dwarf with an orbital period of just 6.91 minutes. [...] The light curve shows eclipses. One dip in the light ...
uhoh's user avatar
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In what ways are neural net classifiers "better" than search algorithms for eclipsing star system searches? (1D time series, not images of cats)

Neural net classifiers are both "hot" and useful. TIC 168789840: A Sextuply-Eclipsing Sextuple Star System is quite an interesting read, and describes the use of one trained on a ...
uhoh's user avatar
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The definition of eclipsing binary star systems

In the second minimum (the 3rd step) there is a smaller decrease in light intensity. For this to happen, wouldn't you need to be looking at the plane of orbit from above rather than directly along the ...
XXb8's user avatar
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Total apparent magnitude of eclipsing binary system

This is a question from the 2016 USAAAO national exam, for which no solutions are given: An eclipsing binary system has a magnitude $m_p$ = 14.2 during the primary transit and $m_s$ = 13.7 during ...
Alistair's user avatar
4 votes
1 answer
403 views

Which things can LIGO see that LISA can't, and vice-versa?

CNET's Astronomers discover two ferociously fast stars locked in a death spiral quotes Kevin Burdge, lead author on the new paper in Nature General relativistic orbital decay in a seven-minute-...
uhoh's user avatar
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2 votes
0 answers
205 views

Sinusoidal Light curve of an eclipsing binary [closed]

This light curve seems really weird to me, I'm used to seeing light curves where the barycenter is a straight line. It either stays at a place, moves at a constant speed or slowly increases its speed. ...
Arnab Chowdhury's user avatar
7 votes
2 answers
168 views

Observing eclipsing binaries

In a matter of weeks, I will be performing my first observation using a 25-cm Newton telescope (+CCD camera) and would be grateful for advice regarding an otherwise basic research that I have decided ...
Spikes's user avatar
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6 votes
3 answers
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What is the spectral reflectance of starlight in a close binary?

Ignore the Blender Monkey! (from here) In a close-orbiting binary pair, a small but significant fraction of the light from each star falls upon the other, and the result has to be carefully modeled ...
uhoh's user avatar
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2 votes
1 answer
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Variable Types of Stars

I'm trying to decode the Variable Types of stars in the Hipparcos Library. I see there are a number of stars for example :- EA/AR - Does that mean the star is both a EA(Eclipsing Binary Star) and AR ...
MiscellaneousUser's user avatar
2 votes
1 answer
210 views

Which data should I use to take the fast Fourier transform (FFT) to find time period for eclipsing binaries?

I am trying to use Kepler Data for Eclipsing Binaries to estimate time period, and then other parameters such as mass, eccentricity, semi-major axis, distance, etc. of the system. I want to write code ...
ruskin23's user avatar
10 votes
1 answer
189 views

V471 Tauri's circumbinary brown dwarf non-observation; Applegate, or over-restrictive assumptions?

tl;dr Has the brown dwarf observation been disproven? I have just started reading about the interesting object V471 Tauri. The first two sentences of the introduction to The V471 Tauri System: A ...
uhoh's user avatar
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1 vote
1 answer
548 views

period of an eclipsing binary

I am confused about the definition of the period of an eclipsing binary, a binary configuration where one component crosses the other across the line of sight. When people say that an eclipsing binary ...
Orbifold's user avatar
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9 votes
1 answer
608 views

How can I measure the mass of eclipsing binary stars?

Is there any method to measure the mass of eclipsing binaries without using Doppler shift effect?
user2427168's user avatar
15 votes
2 answers
524 views

What percent of planets are in the position that they could be viewed edge-on from Earth? (and thus able to undergo transits)

Star number 12644769 from the Kepler Input Catalog was identified as an eclipsing binary with a 41-day period, from the detection of its mutual eclipses (9). Eclipses occur because the orbital ...
Larian LeQuella's user avatar