Examples of 'cepheids' in a sentence
Meaning of "cepheids"
Cepheids are a type of star that pulsates radially, varying in both temperature and diameter to produce brightness changes with a well-defined stable period and amplitude
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- plural of cepheid
How to use "cepheids" in a sentence
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cepheids
Cepheids are a type of very luminous variable stars.
I finally investigate the evolutionary properties of a galactic cepheids.
Cepheids with longer periods are cooler and more luminous.
It was one of the earliest Cepheids to be discovered.
Cepheids go through these changes rhythmically over a few weeks.
Semiregular variables were considered intermediate between LPVs and Cepheids.
Cepheids are a special type of variable star with very stable and predictable brightness variations.
A minority of classical Cepheids show nearly symmetric sinusoidal light curves.
She took a special interest in a class of variable stars called Cepheids.
Brighter Cepheids have longer periods of pulsation.
Many pulsating variable stars such as Cepheids are blue loop stars.
More luminous Cepheids are cooler and larger and have longer periods.
Bird explained why astronomers have ignored ULP cepheids in the past.
Still Cepheids play an important role in determining distances in our galaxy and beyond.
They used photometric methods to obtain new values for the luminosity of the Cepheids.
See also
Cepheids are crucial to the calculations because their distances from Earth can be measured readily.
The researchers calibrated the distances to the Cepheids using a basic geometrical technique called parallax.
Cepheids derive their name from the fact that they were discovered in the constellation Cepheus.
This new technique using ULP cepheids is different.
Type II Cepheids are divided into several subgroups by period.
Astronomers have used Hubble to observe Cepheids with extraordinary results.
The Classical Cepheids are more luminous than the type II Cepheids with the same period.
Distance to Cepheids.
Cepheids pulsate predictably, so changes in their luminosity can be used a very reliable distance.
By a quirk of nature … cepheids keep time like a metronome.
Cepheids closely follow a period-luminosity relationship, with more luminous stars having longer periods.
This technique is allowing us to observe a dozen Cepheids for the duration of one orbit . ”.
Instead of variable cepheids or supernovae, red giants have been used to estimate the distance.
The second measurement uses supernovas and flashing stars in nearby galaxies, known as Cepheids.
Until recently, Cepheids were considered as devoid of circumstellar material.
The variables follow a period-luminosity relation in certain passbands like other standard candles such as Cepheids.
Distances to Cepheids can be determined with an accuracy better than 5 per cent.
I then explored the K ′ band with the recombination instrument FLUOR for some bright Cepheids.
Abstract, Cepheids are essential to calibrate the distances in the Universe.
Chen, et al . An intuitive 3D map of the Galactic warp 's precession traced by classical Cepheids.
Recent measurements using Cepheids have found the Hubble constant to be around 73.
Cepheids [ 1 ] are pulsating stars that have been used as distance indicators since almost a hundred years.
The team used " classic " Cepheids that pulsate for days or months.
In the first field, I am working on the non-linearity of the period-luminosity relation for Cepheids.
Classical Cepheids and type II Cepheids follow different period-luminosity relationships.
Three-dimensional map of the Milky Way, obtained from Cepheids.
Type II Cepheids are variable stars which pulsate with periods typically between 1 and 50 days.
Spiral galaxy NGC 4603 containing Cepheids being used for distance measurements.
Cepheids are a class of very young stars with ages of 10 to 300 million years.
The characteristics of classical Cepheids were discovered by Henrietta Swan Leavitt in 1908.
Here we set up a robust Galactic Disk model based on 1339 classic Cepheids.
In the 1940s, Walter Baade recognized two separate populations of Cepheids classical and type II.
