NGC 3610
A young elliptical galaxy retaining a warped disk.
NGC 3610 is an elliptical galaxy found in the constellation Ursa Major, discovered by German-British astronomer William Herschel on 8 April 1793. It lies about 32.5 million parsecs from the Milky Way and is moving away from us. Classified as type E5, its elliptical shape has a major-to-minor axis ratio of roughly 2:1. This galaxy is relatively young for an elliptical and still retains a disk of gas and dust aligned with its major axis, suggesting it is the remnant of a merger that took place some time ago. The central part of this disk is warped and contains material significantly younger than the rest of the galaxy. NGC 3610 emits an unusual amount of blue light, indicating recent star formation, with an estimated current star formation rate. A population of younger globular clusters orbits the galaxy, likely formed during the merger, while an older, metal-rich set of globular clusters implies that at least one of the original galaxies had a prominent bulge.
Quick Facts
- Epoch
- J2000
- Constellation Name
- Ursa Major
- Ra
- 11 · 18 · 25.276
- Dec
- +58 · 47 · 10.49
- Z
- 0.005694
- Dist Ly
- 32.5 Mpc
- Appmag B
- 11.63
Facts from the source article.
Lore & Background
NGC 3610 was discovered on 8 April 1793 by German-British astronomer William Herschel. It is located at a distance of 32.5 Mpc from the Milky Way. The galaxy has a morphological classification of E5, indicating a 2:1 ratio between the major and minor axes of its elliptical profile. It is a candidate merger remnant of intermediate age, with a surviving disk of gas and dust aligned with the major axis. The central part of the disk displays warping and is significantly younger than the remainder of the galaxy. The unusual amount of blue light emission, measured as B–V in the UBV photometric system, suggests recent star formation. A population of younger globular clusters orbiting the galaxy is a likely product of the merger, while the surviving population of older, metal-rich globular clusters suggests that at least one of the progenitor galaxies had a prominent bulge component.
Reader's Guide
NGC 3610 holds significance as a relatively young elliptical galaxy that has not yet lost its disk, providing a rare opportunity to study the intermediate stages of galactic mergers. Its warped central disk and the presence of both younger and older globular clusters offer clues about the merger event and the nature of the progenitor galaxies. The unusual blue light emission indicates ongoing or recent star formation, which is atypical for elliptical galaxies. The estimated star formation rate and the age of the merger are noted but not specified in detail. As a candidate merger remnant, NGC 3610 helps astronomers understand how elliptical galaxies form and evolve, particularly the role of disk survival and star formation in the aftermath of collisions. Its legacy lies in its status as a transitional object between spiral and fully relaxed elliptical galaxies.
Did You Know?
- NGC 3610 has a morphological classification of E5, with a 2:1 axis ratio.
- The galaxy's central disk is warped and significantly younger than the rest of the galaxy.
- It hosts a population of younger globular clusters likely produced by a merger.
- The unusual blue light emission suggests recent star formation.
More in NGC Objects, Part 6 1-24
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