This portion of the Hubble GOODS-South field contains hundreds of visible galaxies. A representative sample of those galaxies on the right half of the image also have their spectra overlayed in a representation of slitless spectroscopy. By using slitless spectroscopy, a spectrum is obtained that contains both spatial and wavelength information. For example, the inset highlights a spiral galaxy that shines brightly in the emission line of hydrogen-alpha (Hα) as well as in broad starlight (the horizontal strip of light). Its spiral shape is traced by the Hα portion of the spectrum. By combining imaging and spectroscopy, astronomers can learn much more than from each technique alone.
Credits
Image
NASA, ESA
Image Processing
Joseph DePasquale (STScI)
Acknowledgment
University of Geneva, Pascal Oesch (University of Geneva), Mireia Montes (UNSW)
| About The Object | |
|---|---|
| Object Name | HDUV GOODS South |
| Object Description | Deep field image with spectroscopy overlay |
| R.A. Position | 03:32:24.59 |
| Dec. Position | -27:47:28.99 |
| Constellation | Fornax |
| About The Data | |
| Data Description | The HST observations include those from programs , (S. Faber), and (P. Oesch) |
| Instrument | ACS/WFC, WFC3/UVIS, WFC3/IR |
| Exposure Dates | Sep 2012 - Aug 2013, and Nov 2014 - Nov 2015 |
| Filters | WFC3/UVIS F275W, F336W, ACS/WFC F435W, F606W, F775W, F850LP, WFC3/IR F125W, F160W |
| About The Image | |
| Color Info | These images are a composite of separate exposures acquired by the ACS and WFC3 instruments on the Hubble Space Telescope. Several filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F275W, F336W, F435W, F606W Green: F775W, F850LP Red: F125W, F160W |
| 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. |
