From Molecular Cores to Stars
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1 rom Molecular ores to Stars xamining erbig-aro 6/7 00 The University of Texas at ustin or classroom instruction Production supported by a NS ducation/public Outreach grant
2 olor alibration Make sure that your video projector accurately reproduces these colors, especially yellow (Y) and green (). White Y Red Yellow reen Magenta lue yan
3 . What part of the electromagnetic spectrum are you seeing in each image? The tiny dots of light are stars. Most of the stars are far behind this nebula in the foreground that is made of gas and dust. i. Which image shows the infrared light? ii. Which image shows the visible light? iii. What evidence in the images supports your decision?
4 lue Primary olors reen Red
5 lue Primary olors reen Red
6 lue Primary olors reen Red
7 Primary olors lue reen Red
8 = + + = + = + = +
9 yan Secondary olors Yellow Magenta
10 yan Secondary olors Yellow Magenta
11 yan Secondary olors Yellow Magenta
12 Secondary olors yan Yellow Magenta
13 = + + = + = + = +
14 6/7 infrared 6/7 visible 8 µm. µm +.8 µm.6 µm What do the colors in the infrared image mean? The infrared image colors correspond to infrared wavelengths of light, not visible colors. Visible colors range in wavelength from 0. to 0.7 micrometers. The light wavelengths in the infrared image range from.6 to 8.0 micrometers. To make sense of the infrared image, astronomers assign visible colors to infrared wavelengths to produce a false color image, like the one you are examining:.6 micrometers = blue (shortest wavelength),.6 and.8 micrometers combined = green, and 8.0 micrometers = red (longest wavelength). Visual R alse colors wavelength in micrometers 8.0
15 6/7 infrared 6/7 visible 8 µm. µm +.8 µm.6 µm. xamine the infrared image of 6/7 i. Which false colors in the infrared image represent the hottest material? The coolest? ii. Why do you think the other stars in the infrared image are false blue and white? iii. f a feature appears white in the infrared image, what does that indicate about the energy distribution in infrared wavelengths? Visual R alse colors wavelength in micrometers 8.0
16 6/7 infrared 6/7 visible. ly 8 µm. µm +.8 µm.6 µm. xamine the visible light image of 6/7 i. What is the dark blob (centered at ) in the visible light image? xplain. ii. What are the points of light surrounding the dark blob in the visible light image? xplain. Visual R alse colors wavelength in micrometers 8.0
17 6/7 infrared 6/7 visible. ly 8 µm. µm +.8 µm.6 µm. ompare and contrast the two images List the prominent features in each image, and how you think they are related. R image feature Visible image feature Visual Relationship R alse colors wavelength in micrometers 8.0
18 6/7 infrared 6/7 visible. ly 8 µm. µm +.8 µm.6 µm. vidence of motion The tube shaped smoke ring in the infrared image (,,, ) is an outflow of gas and dust from the forming star. The gas is expanding rapidly, with maximum speeds approaching 00 kilometers per second. nclude supporting evidence in your explanations. Why do you think the gas and dust are emitting infrared light? Visual R alse colors wavelength in micrometers 8.0
19 lectron Microscope mage of Space ust 0. mm isplayed in a close-up under an electron microscope, this tiny bit of cosmic dust may be our first sample of a passing comet. Less than onetenth of a millimeter across, the particle is composed of millions of even tinier crystals. lthough chemically similar to some meteorites, its fluffy, crystalline structure is unlike that of any known meteorite.
20 The constellation of Orion What is inside the Orion Nebula? etelgeuse Orion s elt nimation redit: Zolt Levay (STSc) and ryan Preston (STSc and Max-Q igital) Orion Nebula Rigel nimation redit: NS and Walt eimer (STSc) STSc-00- mage by kira ujii
21 Side view of 6. What happens after star formation? These is a visible wavelength images of an object in the Orion Nebula taken with the ubble Space Telescope. i. What is the bright spot in the center of image? ii. What about the dark oval in image and the dark disk in image? iii. Where do you think the planets would form? mage redit: Mark Mcaughrean (Max-Planck-nstitute for stronomy),. Robert O'ell (Rice University), and NS
22 Wink slides: Switch, or wink, between the two following slides to compare and contrast the images.
23 8 µm. µm +.8 µm.6 µm
24
25 ust to ust ycle ig ang and e louds lump & ollapse ust & as Neutron Star Proto Star Proto Planetary isc Sub-stellar Supernova lack ole Star Planets Planetary nebula White warf
26 ig ang Spitzer Space Telescope ores to iscs Legacy Team and e louds lump & ollapse nter-stellar Medium Li, e, N, O, lack ole Proto Star Proto Planetary isc Sub-stellar Objects Supernova Neutron Star Star White warf Planetary Nebula Planets
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