Lecture 11 - Stars and Atomic Spectra
... proved extraordinarily effective in understanding the properties of stars – the Hertzsprung-Russell (HR) diagram ...
... proved extraordinarily effective in understanding the properties of stars – the Hertzsprung-Russell (HR) diagram ...
Compare the following sets of stars using the words: BRIGHTER or
... A. Gas/dust from a stellar nursery come together to form stars: Gravity B. Stars are made of gas, but keep a size/shape (equilibrium): Gravity (inward) and Gas Pressure (outward) 24. Put the following structures in order from smallest to largest: Universe, star, galaxy, asteroid, planet, solar syste ...
... A. Gas/dust from a stellar nursery come together to form stars: Gravity B. Stars are made of gas, but keep a size/shape (equilibrium): Gravity (inward) and Gas Pressure (outward) 24. Put the following structures in order from smallest to largest: Universe, star, galaxy, asteroid, planet, solar syste ...
sachkov_2013 - Putting A Stars into Context
... spectra and strong globally organized magnetic fields. They often show remarkable variations of line strengths, light and magnetic field with periods ranging from a few days to many years. It is believed that this abnormal chemical composition is limited only to the outer stellar envelopes. Chemical ...
... spectra and strong globally organized magnetic fields. They often show remarkable variations of line strengths, light and magnetic field with periods ranging from a few days to many years. It is believed that this abnormal chemical composition is limited only to the outer stellar envelopes. Chemical ...
Searching for planets around evolved stars with COROT
... Recently we have undertaken the detection of two new extrasolar planets, orbiting the giant stars HD 47536 (ref b) and HD 122430 (ref c). These results were consequences of our precise radial velocity (RV) measurements of G and K giants (ref a). A number of stars from our list of 80 targets have bee ...
... Recently we have undertaken the detection of two new extrasolar planets, orbiting the giant stars HD 47536 (ref b) and HD 122430 (ref c). These results were consequences of our precise radial velocity (RV) measurements of G and K giants (ref a). A number of stars from our list of 80 targets have bee ...
Presentation 2
... and planets about the celestial pole? • Hypothesis 1: The Earth is stationary, and the stars, Sun, Moon, and planets revolve around it. • Hypothesis 2: The stars, Sun, Moon, and planets are not revolving about the Earth; it is the Earth which is rotating about its polar axis, once per day. ...
... and planets about the celestial pole? • Hypothesis 1: The Earth is stationary, and the stars, Sun, Moon, and planets revolve around it. • Hypothesis 2: The stars, Sun, Moon, and planets are not revolving about the Earth; it is the Earth which is rotating about its polar axis, once per day. ...
Document
... Please indicate the best answer to the following question on the answer sheet provided. 1. Of all the stars that are currently on the main sequence, which spectral type would be least abundant? a. A, b. B, c. K, d. M 2. What mechanism is responsible for the twisting of the Sun's magnetic filed lines ...
... Please indicate the best answer to the following question on the answer sheet provided. 1. Of all the stars that are currently on the main sequence, which spectral type would be least abundant? a. A, b. B, c. K, d. M 2. What mechanism is responsible for the twisting of the Sun's magnetic filed lines ...
Universe CBA Review - cms16-17
... 33.) What type of EMS wave has the longest wavelength? _____________________ 34.) Does infrared or x-ray waves have a longer wavelength? __________________ 35.) What type of wave has the highest frequency in the EMS? __________________ 36.) Draw and label the visible light spectrum ...
... 33.) What type of EMS wave has the longest wavelength? _____________________ 34.) Does infrared or x-ray waves have a longer wavelength? __________________ 35.) What type of wave has the highest frequency in the EMS? __________________ 36.) Draw and label the visible light spectrum ...
THE ABSOLUTE MAGNITUDE OF RR LYRAE - Cosmos
... when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is much smaller than error of parallax. Only one RR Lyrae star (HIC95497:[Fe/H]={1.37) is measured with a high ...
... when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is much smaller than error of parallax. Only one RR Lyrae star (HIC95497:[Fe/H]={1.37) is measured with a high ...
The Sun and Other Stars - Tuslaw Local School District
... • Light year - the distance light travels in 1 year - light travels at a speed of 186,000 mps (300,000km/s) - light travels about 6 trillion miles in 1 year - ( 9.5 million million kilometers) Parallax - the apparent motion of an object when viewed from 2 different points in space; can only measure ...
... • Light year - the distance light travels in 1 year - light travels at a speed of 186,000 mps (300,000km/s) - light travels about 6 trillion miles in 1 year - ( 9.5 million million kilometers) Parallax - the apparent motion of an object when viewed from 2 different points in space; can only measure ...
Powerpoint of lecture 1
... If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR diagram (Handout 3) – plausible if all stars formed at same time out of same gas cloud same age and composition Then find distances to all, if know distance of one, by ...
... If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR diagram (Handout 3) – plausible if all stars formed at same time out of same gas cloud same age and composition Then find distances to all, if know distance of one, by ...
Life Cycle of a Star
... Red giant star that expands and cools once it loses all its hydrogen Center shrinks and atmosphere grows large and cools ...
... Red giant star that expands and cools once it loses all its hydrogen Center shrinks and atmosphere grows large and cools ...
Strategies to detect Earth-like planets around nearby stars
... advantage: it's a picture! (brightness, colors...) disadvantage: it's only a picture (mass? orbit?,...), new telescopes (TPF) ...
... advantage: it's a picture! (brightness, colors...) disadvantage: it's only a picture (mass? orbit?,...), new telescopes (TPF) ...
pss_endl - University of Texas at Austin
... advantage: it's a picture! (brightness, colors...) disadvantage: it's only a picture (mass? orbit?,...), new telescopes ...
... advantage: it's a picture! (brightness, colors...) disadvantage: it's only a picture (mass? orbit?,...), new telescopes ...
Chapter 18 Notes
... can be seen all year long and all night long. • Light Year – The distance light will travel in a vacuum in one Earth year approx. 6 trillion miles or 9 trillion km. Stars are much farther away than the planets and require another more useful scale than miles or kilometers. • Scientists have observed ...
... can be seen all year long and all night long. • Light Year – The distance light will travel in a vacuum in one Earth year approx. 6 trillion miles or 9 trillion km. Stars are much farther away than the planets and require another more useful scale than miles or kilometers. • Scientists have observed ...
Making H-R Diagrams - PLC-METS
... temperatures, different brightness, different sizes, and different distances from Earth. A star’s mass dictates how bright it will be, how long it will live, its temperature and its size. The Sun is the center of our solar system and is very bright to us on Earth. Other stars in our galaxy are brigh ...
... temperatures, different brightness, different sizes, and different distances from Earth. A star’s mass dictates how bright it will be, how long it will live, its temperature and its size. The Sun is the center of our solar system and is very bright to us on Earth. Other stars in our galaxy are brigh ...
Classifying Stars - Concord Academy Boyne
... The Hertzsprung-Russell Diagram The H-R Diagram shows the relationship between absolute magnitude, luminosity, classification, and effective temperatures of stars. It is a graph that plots star color versus its luminosity. The H-R Diagram can be used to define different types of stars. ...
... The Hertzsprung-Russell Diagram The H-R Diagram shows the relationship between absolute magnitude, luminosity, classification, and effective temperatures of stars. It is a graph that plots star color versus its luminosity. The H-R Diagram can be used to define different types of stars. ...
PSU/TCfA search for planets around evolved stars
... High precision stellar radial velocity measurements are extensively used to detect the reflex motion of a star due to planetary companion. Radial velocity method, however is not sensitive only to the motion of a star around the center of mass of star-planet system. Changes in line shapes arising fro ...
... High precision stellar radial velocity measurements are extensively used to detect the reflex motion of a star due to planetary companion. Radial velocity method, however is not sensitive only to the motion of a star around the center of mass of star-planet system. Changes in line shapes arising fro ...
Stellar Evolution
... • If the core’s mass is even greater/denser than a neutron star, it collapses. • Surface gravity is so great that no matter can escape it…not even electromagnetic ...
... • If the core’s mass is even greater/denser than a neutron star, it collapses. • Surface gravity is so great that no matter can escape it…not even electromagnetic ...
05spectralclasses
... compared to main sequence stars of their spectral class (implied large radius) giants • Some are very underluminous for their class white dwarfs ...
... compared to main sequence stars of their spectral class (implied large radius) giants • Some are very underluminous for their class white dwarfs ...
How Is a Star`s Color Related to Its Temperature?
... 1. Study the star data charts below. Note that the sun, used as a standard of brightness, is given a value of 1. The brightness given for each other star shows how that star compares with the sun. 2. Plot the data from both charts on the graph on the next page. 3. Stars with surface temperatures up ...
... 1. Study the star data charts below. Note that the sun, used as a standard of brightness, is given a value of 1. The brightness given for each other star shows how that star compares with the sun. 2. Plot the data from both charts on the graph on the next page. 3. Stars with surface temperatures up ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.