Transcript - Chandra X
... diagram is a plot of absolute magnitude (and/or luminosity) and temperature (and/or stellar classification) and where a star is plotted shows its evolutionary stage. Stars with stable hydrogen fusion in the core are located on the main sequence – and they evolve to other branches of the diagram when ...
... diagram is a plot of absolute magnitude (and/or luminosity) and temperature (and/or stellar classification) and where a star is plotted shows its evolutionary stage. Stars with stable hydrogen fusion in the core are located on the main sequence – and they evolve to other branches of the diagram when ...
- Lowell Observatory
... the temperature at constant luminosity. This points to a variability which is not related to changes of the energy generation processes but rather to adjustments of the exterior envelope. In other cases the luminosity of the star increases during the outburst which needs an additional energy source. ...
... the temperature at constant luminosity. This points to a variability which is not related to changes of the energy generation processes but rather to adjustments of the exterior envelope. In other cases the luminosity of the star increases during the outburst which needs an additional energy source. ...
Star Formation
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
Galaxies - SD43 Teacher Sites
... 18. Galaxy collisions, like the one shown in the image below, are common in the universe. Explain why, when galaxies collide, the stars they contain rarely hit one another. ...
... 18. Galaxy collisions, like the one shown in the image below, are common in the universe. Explain why, when galaxies collide, the stars they contain rarely hit one another. ...
Slide 1
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
10.1 The Solar Neighborhood Barnard`s Star
... Barnard’s Star (top) has the largest proper motion of any – proper motion is the actual shift of the star in the sky, after correcting for parallax. The pictures (a) were taken 22 years apart. (b) shows the actual motion of the Alpha Centauri complex. ...
... Barnard’s Star (top) has the largest proper motion of any – proper motion is the actual shift of the star in the sky, after correcting for parallax. The pictures (a) were taken 22 years apart. (b) shows the actual motion of the Alpha Centauri complex. ...
Globular Clusters Dynamic Lives The
... evolution. That is, all stars above a certain mass and luminosity in the globular have evolved off the main sequence, as shown by its Hertzsprung-Russell (H-R) diagram. Yet the blue stragglers, which fall above this cutoff, remain on the main sequence (see below). Blue stragglers have now been seen ...
... evolution. That is, all stars above a certain mass and luminosity in the globular have evolved off the main sequence, as shown by its Hertzsprung-Russell (H-R) diagram. Yet the blue stragglers, which fall above this cutoff, remain on the main sequence (see below). Blue stragglers have now been seen ...
H-R Diagram
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
main sequence
... that sweep through Earth's line of sight • The "pulses" of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star's rotation axis and its magnetic axis. • Pulsars seem to pulse from our perspective because the rotation of the neutron star causes the beam of radiatio ...
... that sweep through Earth's line of sight • The "pulses" of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star's rotation axis and its magnetic axis. • Pulsars seem to pulse from our perspective because the rotation of the neutron star causes the beam of radiatio ...
bright - TutorPlus
... depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright whereas high mass stars are hotter, brighter and loca ...
... depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright whereas high mass stars are hotter, brighter and loca ...
2009_ASU_Exam
... closer to both stars, which star will appear brighter from the new observation point? 14) Star P is a pulsating variable star. As it pulses, the apparent magnitude of Star P changes by 5 magnitudes. Assuming that its temperature remains constant as it pulses, what is the ratio of Star P’s maximum an ...
... closer to both stars, which star will appear brighter from the new observation point? 14) Star P is a pulsating variable star. As it pulses, the apparent magnitude of Star P changes by 5 magnitudes. Assuming that its temperature remains constant as it pulses, what is the ratio of Star P’s maximum an ...
Lecture6
... • As already noted in Section (i), the interstellar matter (ISM) is not uniform, but clumpy. New stars are formed in these clumpy, cool, dense clouds called `dark nebulae’ in or near molecular clouds (cool clouds with CO and H2 molecules). Bursts of protostar formation takes place when these dense r ...
... • As already noted in Section (i), the interstellar matter (ISM) is not uniform, but clumpy. New stars are formed in these clumpy, cool, dense clouds called `dark nebulae’ in or near molecular clouds (cool clouds with CO and H2 molecules). Bursts of protostar formation takes place when these dense r ...
Laboratory Title
... After the helium in the core has all been converted into carbon, the core collapses again, and this time the outer layers are expelled into planetary nebula. The core remains as a white dwarf. No further nuclear reactions take place and eventually it will cool so that no light is seen. At that point ...
... After the helium in the core has all been converted into carbon, the core collapses again, and this time the outer layers are expelled into planetary nebula. The core remains as a white dwarf. No further nuclear reactions take place and eventually it will cool so that no light is seen. At that point ...
Chapter 26
... • A supernova is a gigantic explosion in which the temperature in the collapsing core reaches 10 billion K and atomic nuclei are split into neutrons and protons. • When very massive stars, with masses greater than 25 times that of the Sun, collapse past the neutron-star stage, they form a black ho ...
... • A supernova is a gigantic explosion in which the temperature in the collapsing core reaches 10 billion K and atomic nuclei are split into neutrons and protons. • When very massive stars, with masses greater than 25 times that of the Sun, collapse past the neutron-star stage, they form a black ho ...
Variable star information
... Some stars are unstable and pulsate rhythmically, becoming larger and smaller in a periodic manner. These pulsations translate into a periodic variation of the light they emit. The most well known stars of this kind are Cepheid variables that have very stable pulsation periods. The changes in the ...
... Some stars are unstable and pulsate rhythmically, becoming larger and smaller in a periodic manner. These pulsations translate into a periodic variation of the light they emit. The most well known stars of this kind are Cepheid variables that have very stable pulsation periods. The changes in the ...
Stars - Academic Computer Center
... • Binary stars provide a means of determining the masses of stars. • Other properties can also sometimes be determined from binary stars. ...
... • Binary stars provide a means of determining the masses of stars. • Other properties can also sometimes be determined from binary stars. ...
The Evening Sky Map
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
Constellation ProjectConstellation Project(es)
... 19. When you have completed your data table show your teacher. 20. Using the “distance in light years” from your data table draw a line to show the scale of how much distance is between each of ...
... 19. When you have completed your data table show your teacher. 20. Using the “distance in light years” from your data table draw a line to show the scale of how much distance is between each of ...
CHP 15
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
Mark Rubin
... We can use the results from JWST and/or ground-based infrared surveys to search for intense Lyman α sources. • When strong Lyman α emitters are found, both the Lyman α and the He II lines can be observed with R > 3000 spectroscopy using a GSMT. Observations can focus on the region in which He II is ...
... We can use the results from JWST and/or ground-based infrared surveys to search for intense Lyman α sources. • When strong Lyman α emitters are found, both the Lyman α and the He II lines can be observed with R > 3000 spectroscopy using a GSMT. Observations can focus on the region in which He II is ...
Stars on the HR Diagram
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
Nov - Wadhurst Astronomical Society
... month it rises three hours before the Sun and is so bright it is impossible to confuse it with any other astronomical body. Mars still lies in a difficult position for observation from these latitudes. It is in the constellation of Ophiuchus at magnitude +1.2. As I described last month, the shallow ...
... month it rises three hours before the Sun and is so bright it is impossible to confuse it with any other astronomical body. Mars still lies in a difficult position for observation from these latitudes. It is in the constellation of Ophiuchus at magnitude +1.2. As I described last month, the shallow ...
Star Birth: The Formation of Stars Jonathan Rowles
... Star Birth: The Formation of Stars Where are stars born? Stars are born in dark clouds of gas and dust, at temperatures around 1040 degrees above absolute zero. These dark clouds can be seen against a glowing backdrop of stars. They contain between 5 to 500 solar masses of material. The dark clou ...
... Star Birth: The Formation of Stars Where are stars born? Stars are born in dark clouds of gas and dust, at temperatures around 1040 degrees above absolute zero. These dark clouds can be seen against a glowing backdrop of stars. They contain between 5 to 500 solar masses of material. The dark clou ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.