File:NGC4625 - HST - Potw1746a.tif
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Summary
editDescriptionNGC4625 - HST - Potw1746a.tif |
English: Cosmic search for a missing limb
Astronomers looked at NGC 4625 in different wavelengths in the hope of solving this cosmic mystery. Observations in the ultraviolet provided the first hint: in ultraviolet light the disc of the galaxy appears four times larger than on the image depicted here. An indication that there are a large number of very young and hot — hence mainly visible in the ultraviolet — stars forming in the outer regions of the galaxy. These young stars are only around one billion years old, about 10 times younger than the stars seen in the optical centre. At first astronomers assumed that this high star formation rate was being triggered by the interaction with another, nearby dwarf galaxy called NGC 4618. They speculated that NGC 4618 may be the culprit “harassing” NGC 4625, causing it to lose all but one spiral arm. In 2004 astronomers found proof for this claim: The gas in the outermost regions of the dwarf galaxy NGC 4618 has been strongly affected by NGC 4625. Credit: ESA/Hubble & NASA Coordinates Position (RA): 12 41 52.83 Position (Dec): 41° 16' 25.90" Field of view: 2.82 x 1.50 arcminutes Orientation: North is 22.5° left of vertical Colours & filters Band Wavelength Telescope Optical V 606 nm Hubble Space Telescope ACS Optical V 606 nm Hubble Space Telescope ACS Optical I 814 nm Hubble Space Telescope ACS Optical I 814 nm Hubble Space Telescope ACS. |
Date | 13 November 2017, 06:00 (release) |
Source | https://www.spacetelescope.org/images/potw1746a/ |
Author | Credit: ESA/Hubble & NASA |
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editESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:22, 13 November 2017 | 3,386 × 1,806 (15.2 MB) | Fabian RRRR (talk | contribs) | =={{int:filedesc}}== {{Information |description={{en|1='''Cosmic search for a missing limb This new Picture of the Week, taken by the NASA/ESA Hubble Space Telescope, shows the dwarf galaxy NGC 4625, located about 30 million light-years away in the c... |
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Width | 3,386 px |
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Height | 1,806 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 25 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2015 (Windows) |
File change date and time | 15:19, 9 June 2017 |
Color space | Uncalibrated |