PPT-Hubble Diagram: Distribution of Galaxies

Hubbles Law v H o d Velocity increases with distance Expanding Universe Hubbles law Universe is expanding Universe had a beginning How long ago Age of the universe 1H. The Affinity process is often used to group ideas generated by Brainstorming Why should teams use the Affinity process The Affinity process is a good way to get people to work on a creative level to address difficult issues It may be used in situati #2 . Grades are posted on course website. Average = . 122/. 180, . s.d. . = . 29 . (Section 1). . 126/. 180, . s.d. . = 24 (Section 4). Highest . 180/. 180. Scores below 100 => “serious concerns”. Introduction. Trigonometric Parallax . Spectroscopic Parallax . Cepheid Variables . Type Ia Supernovae. Tully-Fisher Relationship. Hubble’s ‘Law’ . Trigonometric Parallax. While fundamental, this method is very limited in terms of how far away one can use it. For large numbers of star, ground-based measurements of parallax do not get beyond about 20 pc, although on individual objects this can be extended to about 100 pc (with much effort). . Michael Fall. STScI. . CoolSci. Talk. . Specific Angular Momentum . vs. Mass. Fall 1983. . j. = J/M . α. . M. α. with . α. ≈ . 2/3. S and E galaxies offset by ~6x. Ms. Cordaro . SMHS . Earth Science. Review/Warm up – Write this in your journal. (Do not fill in the blanks yet!!). A light year = How far _ _ _ _ _ travels in _ _ _ year.. The electromagnetic spectrum is made up of different size _ _ _ _ _ that produce _ _ _ _ _ _ in the form of radiation.. Extragalactic Distance Scale. Cepheids. M. V. =-3.35logΠ-2.13+2.13(B-V) . Π. =period (days). Novae M. V. (max)=-9.96-2.31log(. Δm. /day). first 2 . mags. Planetary Nebulae Luminosity Function M. The Hubble Tuning-Fork Diagram. This is the traditional scheme for classifying galaxies:. Elliptical Galaxies. Elliptical galaxies. have smooth, round distributions of stars. They resemble globular clusters, except they are much larger. They . Universe. Imagine that you find a star with an unknown distance, but you notice that it has a distinctive characteristic that tells you that it is a specific type of star. And let’s imagine that all stars of that type have the same luminosity, and you happen to know the value of that luminosity. You can then estimate the distance for the star you found from the inverse square law of light:. Question 1. Based on their shapes and stars, elliptical galaxies are most like the Milky Way’s. disk . and spiral arms.. halo. .. central . bulge.. open . clusters.. companion . galaxies,. the . Magellanic. .. 1. First spiral nebula found in 1845 by the Earl of . Rosse. . Speculated it was beyond our Galaxy.. 1920 - "Great Debate" between Shapley and Curtis on whether spiral nebulae were galaxies beyond our own. Settled in 1924 when Edwin . By Gayla Burrage. The Hubble Telescope was launched in 1990.. Recently, astronauts voted . on the top. . photographs.  taken by Hubble, in its 16-year journey so far. . Reporter . Michael Hanlon says the photos "illustrate that our universe is not only deeply strange, but also almost impossibly beautiful."  . How It Works. Every 97 minutes, Hubble completes a spin around . Earth. .. . As it travels, Hubble's mirror captures light and directs it into its several science . instruments. The Hubble is . a type of telescope known as a . Phuong Nguyen and Chris Scaptura. Breaking Boundaries: . The American Experience in Innovation. The James Webb Telescope. The James Webb Telescope will be a large infrared telescope with a 6.5 meter primary mirror. The telescope will be launched on an . Laura . Magrini. INAF- . Osservatorio. . Astrofisico. di . Arcetri. In Our Galaxy. Open clusters (disc population): . Many (~2200 known clusters). . even more new candidates in the inner disc from infrared surveys .