18.0.55: wiu6thesupernovaof1885 Last updated Aug 21, 2021 Save as PDF 18.0.54: wiu15_c_amount_of_cold_dark_matter 18.0.56: wiu_12_1_determining_masses_of_lenses_grav_len_mass_measurement Page ID48118 Kim Coble, Kevin McLin, & Lynn CominskySan Francisco State University, Chico State University, & Sonoma State University ( \newcommand{\kernel}{\mathrm{null}\,}\) Loading 6%Show DataDataStepItemValue1Angular Size?? arc sec2Expansion Rate?? km/s3Physical Size?? lightyear 4Distance?? lightyear Introduction Steps:Use the image to measure the angular size of the remnant.Use the spectrum to estimate the expansion velocity of the cloud.Use the age of the remnant and its expansion velocity to determine the physical size of the cloud.Use the small angle formula to determine a distancr from the angulat size and physical size.Measure Angular Size of SNCalculationDiameter (Pixels)×0.049 arc sec/pixel = ?? arc secMeasure Expansion Rate of SN Sample TooltipFWHM: 105.72Line 1Line 2Line 1×c = ?? km/sLine 2 - 35×c = ?? km/sAverage Velocity?? km/sCalculate Physical Size of SNAge of SupernovaYears: 1998 - 1885 =yearsSeconds: 60 s min×60 min hr×24 hr day×365 day year× years =0. secondsSize of SupernovaKm : 0. seconds × ?? km/s ?? km Ly : ?? km * 1.05e-13 ly/km= ?? ly Distance to SNConvert Angular Size to Radians0 arcsec ×4.85e-6 rad/arcsec = ?? rads Calculate Distance?? ly rads= ?? ly PreviousNext