(Solved): HELLO,I'M STUDYING A MODERN ASTROPHYSICS COURSE AND NEED HELP WITH THE FOLLOWING QUESTIONS. CAN YOU, ...

CONCEPTUAL QUESTIONS FOR MODERn ASTRO 1 B. GALAXIES B.1 From STARS TO GALAXIES 1.1 Stellar Evolutionary Phases. Name (in full and acronym) the evolutionary phases of a typical intermediatemass star where nuclear fuel is burnt in the core and state the type of fuel. Does nuclear burning also happen outside these phases? If yes, in which stages and what type of fuel is involved? [10 marks] 1.2 Stellar Lifetimes. What is the mass of stars that are going to live approx twice the current age of the Universe? Provide both the mass value as well as the lifetime value [2 marks] 1.3. Stellar Luminosities. How much more luminous would a galaxy be if it would be composed by only 100 Msun stars with respect to one made by only Suns? Demonstrate your answer. [2 marks] 1.4 Stellar Initial Mass Functions 1.4.1 What physical process establishes the Initial Mass Function (IMF) of a stellar population? [1 mark]. 1.4.2 Write the simplest functional form for the IMF valid for the Milky Way disk. Then calculate its normalisation for the case in which stars only form with masses between $0.5-8$ solar masses. [ 2 marks]