PDF-The mass distribution in spiral galaxies

IrinaYegorovaSISSA Trieste Italy In collaboration with Paolo Salucci Alessandro Pizzella NivDrory Outline149The disk mass of spiral galaxies149Radial TullyFisher relation RTF149Satell. Thorsten Naab . MPA, . Garching. . What regulates galaxy formation? . Leiden, April, 22. nd. How do massive galaxies get their gas and stars?. Gas accretion involves dissipation – energy can be radiated away . D.J. Pisano. (West Virginia University). Why study galaxy environment?. Nature vs. Nurture. Can they be distinguished?. What does the environment do to a galaxy?. What would a galaxy look like without any environmental influence?. Li Jiang-Tao. 1. Service d’Astrophysique, CEA, Saclay, France. 2. . Department. of . Astronomy. , . University. of Michigan, Ann Arbor, USA. Outline. 1. Introduction. 2. Diffuse X-ray . observation. Galaxies . And the Foundation of Modern Cosmology. How are the lives of galaxies connected with the history of the universe?. Hubble Deep Field. Our deepest images of the universe show a great variety of galaxies, some of them billions of light-years away. 2. The Universe. Th. 3. The Universe is . everything. t. hat exists in space. 4. Galaxies. 5. Galaxies and Shapes (…Cont.). Spiral galaxies:. can be broken down in two categories. Circular spiral - round center. Spiral Structure. . The Astronomical Context. By the 1920’s, we knew that the once-mysterious spiral nebulae were flattened galaxies. . Our Milky . Way is . also. flattened. . Two obvious . questions arose:. megaparsecs. away be moving with respect to us, according to Hubble’s Law? Hint: H. 0. = 70 km/s/. Mpc. 1,400 km/s. 14,000 km/s. 140,000 km/s. 140 km/s. How fast would a galaxy 2,000 . megaparsecs. and Earth. Which phase of the Moon would. be seen by people on Earth?. Earth. Moon. Sun. New Moon. MYP Unit Question. : What’s out there?. Area of Interaction. : Human Ingenuity. Learner profile:. .. 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 . Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. Chapter 2. Stars. Section 1 Vocabulary. Spectrum. Apparent Magnitude. Absolute Magnitude. Light-Year. Parallax. Color of Stars. Red and Yellow. Cool. Blue . Warm. Blue flame hotter than yellow flame. The Hubble Deep Field. 10 day exposure –field located in the Big Dipper. Edwin Hubble. Edwin . Hubble. Hubble’s Galaxy Classification . Spiral Galaxies. galaxies like the Milky Way with arcing structures lying in a plane and emanating from the nuclear bulge. Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. The Universe. The big bang theory. Happened approximately 13.5 billion years ago. The Big Bang was caused by the density of the compressed galaxies. It was in a very high density state, then it expanded. After the beginning expansion, it cool to let subatomic particles and later on, simple atoms to form. .