These two images of a huge pillar of star birth demonstrate how observations taken in visible and in infrared light by NASA's Hubble Space Telescope reveal dramatically different and complementary views of an object.
The pictures demonstrate one example of the broad wavelength range of the new Wide Field Camera 3 (WFC3) aboard the Hubble telescope, extending from ultraviolet to visible to infrared light.
Composed of gas and dust, the pillar resides in a tempestuous stellar nursery called the Carina Nebula, located 7,500 light-years away in the southern constellation Carina. The pair of images shows that astronomers have a much more complete view of the pillar and its contents when distinct details not seen at visible wavelengths are uncovered in near-infrared light.
The top image, taken in visible light, shows the tip of the 3-light-year-long pillar, bathed in the glow of light from hot, massive stars off the top of the image. Scorching radiation and fast winds (streams of charged particles) from these stars are sculpting the pillar and causing new stars to form within it. Streamers of gas and dust can be seen flowing off the top of the structure.
Nestled inside this dense structure are fledgling stars. They cannot be seen in this image because they are hidden by a wall of gas and dust. Although the stars themselves are invisible, one of them is providing evidence of its existence. Thin puffs of material can be seen traveling to the left and to the right of a dark notch in the center of the pillar. The matter is part of a jet produced by a young star. Farther away, on the left, the jet is visible as a grouping of small, wispy clouds. A few small clouds are visible at a similar distance on the right side of the jet. Astronomers estimate that the jet is moving at speeds of up to 850,000 miles an hour. The jet's total length is about 10 light-years.
In the image at bottom, taken in near-infrared light, the dense column and the surrounding greenish-colored gas all but disappear. Only a faint outline of the pillar remains. By penetrating the wall of gas and dust, the infrared vision of WFC3 reveals the infant star that is probably blasting the jet. Part of the jet nearest the star is more prominent in this view. These features can be seen because infrared light, unlike visible light, can pass through the dust.
Other infant stars inside the pillar also appear to emerge. Three examples are the bright star almost directly below the jet-producing star, a fainter one to its right, and a pair of stars at the top of the pillar. Winds and radiation from some of the stars are blowing away gas from their neighborhoods, carving out large cavities that appear as faint dark holes.
Surrounding the stellar nursery is a treasure chest full of stars, most of which cannot be seen in the visible-light image because dense gas clouds veil their light. Many of them are background stars.
Hubble's Wide Field Camera 3 observed the Carina Nebula on July 24-30, 2009. WFC3 was installed aboard Hubble in May 2009 during Servicing Mission 4. The composite image was made from filters that isolate emission from iron, magnesium, oxygen, hydrogen, and sulfur.
These Hubble observations of the Carina Nebula are part of the Hubble Servicing Mission 4 Early Release Observations.
Credits
NASA, ESA, and the Hubble SM4 ERO Team| About The Object | |
|---|---|
| Object Name | Jet in Carina |
| Object Description | Stellar Jet/Young Stellar Object |
| R.A. Position | 10h 43m 51.3s |
| Dec. Position | -59° 55' 21.0" |
| Constellation | Carina |
| Distance | 7,500 light-years (2,300 parsecs) |
| Dimensions | This image is 3 arcminutes (6.6 light-years or 2.0 parsecs) wide. |
| About The Data | |
| Data Description | The Hubble images were created from data from proposal : K. Noll (STScI), C. Proffitt (STScI/CSC), D. Leckrone and M. Niedner (NASA/GSFC), and M. Livio and Z. Levay (STScI). Acknowledgments for Jet in Carina Observers: K. Noll (STScI), C. Proffitt (STScI/CSC), D. Leckrone and M. Niedner (NASA/GSFC), and M. Livio and Z. Levay (STScI) Data Analysis: H. Bushouse, J. Anderson, and M. Mutchler (STScI) Image Composition: Z. Levay and L. Frattare (STScI) Text: L. Frattare, D. Weaver and R. Villard (STScI) Illustrations: Z. Levay (STScI) Video: G. Bacon (STScI) Science Consultants: M. Livio and N. Walborn (STScI), and N. Smith (UC Berkeley) |
| Instrument | HST>WFC3/UVIS (top) and HST>WFC3/IR (bottom) |
| Exposure Dates | July 24-30, 2009, Exposure Time: 11.4 hours |
| Filters | WFC3/UVIS (top): F502N ([O III]), F656N (H-alpha), and F673N ([S II]) WFC3/IR (bottom): F126N ([Fe II]) and F164N ([Fe II]) |
| About The Image | |
| Color Info | The image is a composite of separate exposures made by the WFC3 instrument on the Hubble Space Telescope. Five filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: WFC3/UVIS image (top): Red: F673N ([S II]) Green: F656N (H-alpha) Blue: F502N ([O III]) WFC3/IR image (bottom): Cyan: F126N ([Fe II]) Orange: F164N ([Fe II]) |
| Compass Image |  |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
