Question

Submit a paragraph explaining the location of the Stars you plotted and whether that matches their Roman Numeral designations such as V, lV, lll, ll, lb and la and Vl, the material that was covered in Lecture 10 concerning Main Sequence stars, Sub-Giants, Giants, Bright Giants, Less-luminous Supergiants, Brightest supergiants and White Dwarves and where their expected locations are on the HR Diagram. Based on the Spectral classification of each of the twenty stars you plotted, do their locations make sense based on what you learned? Which of the stars you plotted are still Main Sequence stars,? Which ones are Sub-Giants, Giants, Bright Giants, Less-Luminous and Brightest Supergiants and White Dwarves? By doing this paragraph, you get to actually check whether you placed the locations of the stars in the right places and if it doesn't match where it should be, you can change your graphs. Also, check the B-V color index of each of the twenty stars on Wikipedia and does it match the colors that they're falling in. In other words, if the B-V index is +2, then does the star fall in the Red range, if it is -.4, does it fall in the Violet Range, etc. You can just put the name of the star in Wikipedia, and on the right side, you should find the B-V index. State the B-V index of each star and whether it matched where you placed the star and its color. Make your final conclusions on the color code and spectral classification and their locations!!!!

Answer 1

I do not know which stars you plotted in the tecture but following HR diagrams will be helpfull -

An HR diagram showing many well known stars in the Milky Way galaxy? -

30 Msun 10 β Centauri Rigel SUPERGIANTS Spica Lifetime 104107 yrs Antares Bellatrix Polaris MAIN GIANT S SEQUENCE Lifetime 10 yrs Aldebaran 10 Vega Sirius 5 10 Lifetime 109 yrs a CentauriA α Centauri B CetiEridani 61 Cygni A 61 Cygni 8 0.1 Lifetime 1010 yrs Lacaile 9352 0.3 M Gliese 725A * Gliese 725 8 Sirius B 10-2 WHITE Barnard's Star. 0.1M, DWARFS Lifetime 1011 yrs Ross 128 10-3 Wolf 359 Proxima Centauri . OX Cancri 10-4 10-5 G K 30,000 10,000 6,000 3,000 decreasing ncreasing temperature surface temperature (Kelvin) temperature

For spectral class -

temperature (K) -10 r 10 ooRigel Dene upergiants la Antares lb 10,000 ulus Sirius 100 Ce sun VI 10 white dwarfs 0.01 0.01 og 15 0.0001 05 BO A0FO GO KO MO CO spectral class

More stars -

Now you can easily plot and make your paragraph. For further help comment in box below!

Hertzsprung-Russell Diagram Blue or blue-white White Yellow Red-orange Red Supergiants 丶Rigel-11 Deneb 11 North Star (Polaris) Betelgeuse Eridani Antares Canopus \Regulus-1101 \ Vega . Mizar Capella Aldebarah ArturMira Pollux Giants Albir Procyon\ \ Procyon Alcor Alpha entauri A Sun Tau Ceti Alpha Centauri B Sirius B Epsilon Eridani White dwarfs Barnard's star Procyon B ㄩ Van Maanen s star 5,000 Surface Temperature (°C) 50,000 20,000 10,000 6,000 3,000