A Study of the Correlation between Galactic Distance and Morphology Harry Gaebler and Rebecca Jensen- Clem.

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Presentation transcript:

A Study of the Correlation between Galactic Distance and Morphology Harry Gaebler and Rebecca Jensen- Clem

What is Redshift? -The distances to 30 different galaxies were computed before camp using redshift. -Redshift is the movement of spectral lines toward the red end of the spectrum as light from distant objects is stretched. -Redshift can be used to calculate the recessional velocity of objects. -After obtaining the recessional velocity of an object, one can calculate its distance using Hubble's Law.

Sa Galaxy Redshift Results -Galaxy Redshift Recessional V Distance -NGC 3368 Z= km/s 39 Mly -NGC 4594 Z= km/s 52 Mly -NGC 3626 Z= km/s 65 Mly -NGC 2775 Z= km/s 59 Mly -NGC 488 Z= km/s 104 Mly -NGC 3898 Z= km/s 51 Mly -NGC 3593 Z= km/s 27 Mly -NGC 4698 Z= km/s 44 Mly -NGC 3281 Z= km/s 150 Mly -NGC 2639 Z= km/s 142 My -NGC 7217 Z= km/s 41 Mly

Sb Galaxy Redshift Results -Galaxy Redshift Recessional V Distance -NGC 5055 Z= km/s 37 Mly -NGC 3627 Z= km/s 35 Mly -NGC 3628 Z= km/s 37 Mly -NGC 3031 Z= km/s 13 Mly -NGC 891 Z= km/s 23 Mly -NGC 224 Z= km/s 2.5 Mly -NGC 2841 Z= km/s 27.6 Mly -NGC 4419 Z= km/s 52 Mly -NGC 1589 Z= km/s 165 Mly

Sc Galaxy Redshift Results -Galaxy Redshift Recessional V Distance -NGC 598 Z= km/s 3 Mly -NGC 5457 Z= km/s 27 Mly -NGC 5194 Z= km/s 31 Mly -NGC 628 Z= km/s 30 Mly -NGC 5236 Z= km/s 15 Mly -NGC 4321 Z= km/s 68 Mly -NGC 6946 Z= km/s 19 Mly -NGC 4244 Z= km/s 6.5 Mly -NGC 4631 Z= km/s 25 Mly -NGC 173 Z= km/s 191 Mly

Redshift Results for Galaxies >35 Mly

Redshift Results for Galaxies <35 Mly

Our Camp Observations We chose 4 different objects to observe with the CCD camera on the 61'' Kuiper Telescope -NGC 6946 (Sc) -NGC 7331 (Sb) -NGC 7604 (Sa) -NGC 7217 (Sa)

NGC 7217 (Sa)

NGC 7604 (Sa)

NGC 7331 (Sb)

NGC 6946 (Sc)

Photometry ~Adding up the brightnesses of the disk and the bulge gives the total brightness of the galaxy ~ IRAF was used to reduce the data ~Integration of the disk and bulge data was the final step before finding the distance

Finding the Distance -(f1)(d1)^2=(f2)(d2)^2 -We used known redshifts as one of the distances in the equation -Galaxy Calculated Distance Redshift Distance Mly 19 Mly Mly 34 Mly Mly 164 Mly Mly 41 Mly