NGC 6670

Last updated
NGC 6670
Hubble Interacting Galaxy NGC 6670 (2008-04-24).jpg
NGC 6670 as seen by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Draco
Right ascension 18h 33m 33.4s (NGC 6670E) - 18h 33m 33.7s (NGC 6670W) [1]
Declination +59° 53′ 16″ (NGC 6670E) - +59° 53′ 23″ (NGC 6670W) [1]
Redshift 8512 km/s [2]
Distance 401 million [3]
Apparent magnitude  (V)14.3 [4]
Apparent magnitude  (B)15.1 [5]
Characteristics
Type S [5]
Size1.0 [6]
Other designations
IRAS 18329+5950, NGC 6670A, UGC 11284, MCG 10-26-44, PGC 62033, CGCG 301-31 [3]

NGC 6670 is a pair of interacting galaxies within the Draco constellation, which lie around 401 million light-years from Earth. [3] Its shape resembles a leaping dolphin. [7] NGC 6670 was discovered by Lewis A. Swift on July 31, 1886. [1] NGC 6670 is a combination of two colliding disc galaxies which are known as NGC 6670E and NGC 6670W. The galaxy is 100 billion times brighter than the Sun. [8] The galaxies have already collided once before and they are now moving towards each other again nearing a second collision. [9] Its apparent magnitude is 14.3, [4] its size is 1.0 arc minutes. [6]

Contents

NGC 6670E

NGC 6670E (also known as NGC 6670-1 and NGC 6670B) is a disc galaxy on the north-eastern side of NGC 6670. It has mostly been destroyed by its collision with NGC 6670W. It has bright nuclear region with a luminosity of 18 L⊙/Mbol due to a large amount of star formation. Its star formation efficiency is at least four times higher than the Milky Way disc, and is approaching the starburst phase. This large amount of star formation is likely to be caused by its collision with NGC 6670W. To the south-east of the nucleus there is a bright and fuzzy area caused by dust extinction or a large concentration of blue stars. NGC 6670E is in-front of NGC 6670W and they are moving towards each other. The movement of the H I region of this galaxy has been disrupted by its collision with NGC 6670W. [10]

NGC 6670W

NGC 6670W (also known as NGC 6670-2 and NGC 6670A) is a disc galaxy on the south-western side of NGC 6670. It forms the larger part of NGC 6670. It has remained mostly intact after its collision with NGC 6670E. Its nuclear region is slightly dimmer than NGC 6670E, being measured at 11 L⊙/Mbol, but this number still indicates a higher than normal level of star production. Both the western and eastern sides of the disc are significantly curved. The H I region of NGC 6670W is a rotating ring. The western end of the galaxy has a stronger radio continuum peak indicating that it may be a recent star forming region. [10]

Related Research Articles

<span class="mw-page-title-main">Galaxy</span> Large gravitationally bound system of stars and interstellar matter

A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a thousand stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few percent of that mass visible in the form of stars and nebulae. Supermassive black holes are a common feature at the centres of galaxies.

<span class="mw-page-title-main">NGC 6240</span> Galaxy merger remnant in the constellation Ophiuchus

NGC 6240, also known as the Starfish Galaxy, is a nearby ultraluminous infrared galaxy (ULIRG) in the constellation Ophiuchus. The galaxy is the remnant of a merger between three smaller galaxies. The collision between the three progenitor galaxies has resulted in a single, larger galaxy with three distinct nuclei and a highly disturbed structure, including faint extensions and loops.

<span class="mw-page-title-main">Starburst galaxy</span> Galaxy undergoing an exceptionally high rate of star formation

A starburst galaxy is one undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy, or the star formation rate observed in most other galaxies.

<span class="mw-page-title-main">Sculptor Galaxy</span> Intermediate spiral galaxy in the constellation Sculptor

The Sculptor Galaxy is an intermediate spiral galaxy in the constellation Sculptor. The Sculptor Galaxy is a starburst galaxy, which means that it is currently undergoing a period of intense star formation.

<span class="mw-page-title-main">Antennae Galaxies</span> Interacting galaxies in the constellation Corvus

The Antennae Galaxies are a pair of interacting galaxies in the constellation Corvus. They are currently going through a starburst phase, in which the collision of clouds of gas and dust, with entangled magnetic fields, causes rapid star formation. They were discovered by William Herschel in 1785.

<span class="mw-page-title-main">NGC 1569</span> Galaxy in the constellation Camelopardalis

NGC 1569 is a dwarf irregular galaxy in Camelopardalis. The galaxy is relatively nearby and consequently, the Hubble Space Telescope can easily resolve the stars within the galaxy. The distance to the galaxy was previously believed to be only 2.4 Mpc. However, in 2008 scientists studying images from Hubble calculated the galaxy's distance at nearly 11 million light-years away, about 4 million light-years farther than previously thought, meaning it is a member of the IC 342 group of galaxies.

<span class="mw-page-title-main">NGC 6745</span> Galaxy in the constellation Lyra

NGC 6745 is an irregular galaxy about 206 million light-years away in the constellation Lyra. It is actually a trio of galaxies in the process of colliding.

<span class="mw-page-title-main">Interacting galaxy</span> Galaxies with interacting gravitational fields

Interacting galaxies are galaxies whose gravitational fields result in a disturbance of one another. An example of a minor interaction is a satellite galaxy disturbing the primary galaxy's spiral arms. An example of a major interaction is a galactic collision, which may lead to a galaxy merger.

<span class="mw-page-title-main">NGC 520</span> Pair of colliding spiral galaxies in the constellation Pisces

NGC 520 is a pair of colliding spiral galaxies about 105 million light-years away in the constellation Pisces. They were discovered by astronomer William Herschel on 13 December 1784.

<span class="mw-page-title-main">Eyes Galaxies</span> Pair of galaxies in the constellation Virgo

The Eyes Galaxies are a pair of galaxies about 52 million light-years away in the constellation Virgo. The pair are members of the string of galaxies known as Markarian's Chain.

<span class="mw-page-title-main">Galaxy merger</span> Merger whereby at least two galaxies collide

Galaxy mergers can occur when two galaxies collide. They are the most violent type of galaxy interaction. The gravitational interactions between galaxies and the friction between the gas and dust have major effects on the galaxies involved. The exact effects of such mergers depend on a wide variety of parameters such as collision angles, speeds, and relative size/composition, and are currently an extremely active area of research. Galaxy mergers are important because the merger rate is a fundamental measurement of galaxy evolution. The merger rate also provides astronomers with clues about how galaxies bulked up over time.

<span class="mw-page-title-main">NGC 1672</span> Galaxy in the constellation Dorado

NGC 1672 is a barred spiral galaxy located in the constellation Dorado. It was discovered by the astronomer James Dunlop on November 5, 1826. It was originally unclear whether it was a member of the Dorado Group, with some sources finding it to be a member and other sources rejecting its membership. However, recent tip of the red-giant branch (TRGB) measurements indicate that NGC 1672 is located at the same distance as other members, suggesting it is indeed a member of the Dorado Group.

<span class="mw-page-title-main">NGC 660</span> Polar-ring galaxy in the constellation Pisces

NGC 660 is a peculiar and unique polar-ring galaxy located approximately 45 million light-years from Earth in the Pisces constellation. It is the only such galaxy having, as its host, a "late-type lenticular galaxy". It was probably formed when two galaxies collided a billion years ago. However, it may have first started as a disk galaxy that captured matter from a passing galaxy. This material could have, over time, become "strung out" to form a rotating ring.

<span class="mw-page-title-main">NGC 1741</span> Distant pair of interacting galaxies in the constellation Eridanus

NGC 1741 is a distant pair of interacting galaxies in the Eridanus constellation. It was discovered on 6 January 1878 by French astronomer Édouard Stephan. As a result of the collision, the galaxies are in a rapid starburst phase. The galaxies are classed as Wolf–Rayet galaxies due to their high content of rare Wolf–Rayet stars.

<span class="mw-page-title-main">NGC 2623</span> Interacting galaxy in the constellation Cancer

NGC 2623(also known as ARP 243) is an interacting galaxy located around 263 million light-years away in the constellation Cancer. Due to NGC 2623 being in the late stage of merging, the compression of the gas within the galaxy has led to a large amount of star formation, and to its unique structure of a bright core with two extending tidal tails.NGC 2623 was discovered on January 19, 1885, by Édouard Jean-Marie Stephan. NGC 2623 does not have an active galactic nucleus, and only one supernova was observed in NGC 2623, SN 1999gd, a Type 1a Supernova that was discovered in 1999.

<span class="mw-page-title-main">NGC 7469</span> Galaxy located in the constellation Pegasus

NGC 7469 is an intermediate spiral galaxy in the constellation of Pegasus. NGC 7469 is located about 200 million light-years away from Earth, which means, given its apparent dimensions, that NGC 7469 is approximately 90,000 light-years across. It was discovered by William Herschel on November 12, 1784.

<span class="mw-page-title-main">NGC 6621</span> Interacting galaxy in the constellation Draco

NGC 6621 is an interacting spiral galaxy in the constellation Draco. It lies at a distance of circa 260 million light-years. NGC 6621 interacts with NGC 6622, with their closest approach having taken place about 100 million years before the moment seen now. The pair was discovered by Edward D. Swift and Lewis A. Swift on June 2, 1885. Originally NGC 6621 was assigned to the southeast galaxy, but now it refers to the northern one. NGC 6621 and NGC 6622 are included in the Atlas of Peculiar Galaxies as Arp 81 in the category "spiral galaxies with large high surface brightness companions".

<span class="mw-page-title-main">NGC 1142</span> Interacting and distorted spiral galaxy in the constellation Cetus

NGC 1142 is a distorted spiral galaxy in the constellation of Cetus. It is located about 370 million light years away from Earth, which means, given its apparent dimensions, that NGC 1142 is approximately 170,000 light years across. It is a type 2 Seyfert galaxy. It interacts with the elliptical galaxy NGC 1141.

<span class="mw-page-title-main">NGC 2445</span> Galaxy in the constellation Lynx

NGC 2445 is a peculiar ring galaxy in the constellation Lynx. The galaxy lies about 200 million light years away from Earth, which means, given its apparent dimensions, that NGC 2445 is approximately 100,000 light years across. It was discovered by Édouard Stephan on January 18, 1877. The galaxy interacts with another galaxy, NGC 2444, and as a result its shape is distorted and new stars are formed.

<span class="mw-page-title-main">NGC 2444</span> Galaxy in the constellation Lynx

NGC 2444 is a peculiar lenticular galaxy in the constellation Lynx. The galaxy lies about 135 million light years away from Earth, which means, given its apparent dimensions, that NGC 2444 is approximately 50,000 light years across. It was discovered by Édouard Stephan on January 18, 1877. The galaxy interacts with another galaxy, NGC 2445, whose shape is distorted and has large star formation regions.

References

  1. 1 2 3 "NGC 6670 (= PGC 62033)". cseligman. Retrieved 5 November 2017.
  2. ↑ "NGC 6670". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 5 November 2017.
  3. 1 2 3 "Galaxy NGC 6670". DSO. Retrieved 5 November 2017.
  4. 1 2 "The galaxy NGC 6670". In the sky. Retrieved 5 November 2017.
  5. 1 2 "Object: NGC 6670-1 (*)". SEDS. Retrieved 5 November 2017.
  6. 1 2 "Detailed Information for Object No. 2". NASA/IPAC. Retrieved 5 November 2017.
  7. ↑ "Leaping Dolphin". Amazingspace. Retrieved 5 November 2017.
  8. ↑ "NGC 6670". ESA. 24 April 2008. Retrieved 5 November 2017.
  9. ↑ "NGC 6670, a pair of overlapping galaxies". Anne's Astronomy. 2012-03-04. Retrieved 5 November 2017.
  10. 1 2 Wang, Wei-Hao; Lo, K. Y.; Gao, Yu; Gruendl, Robert A. (2001). "Gas Distribution and Starburst Activity in the Widely Separated Interacting Galaxy Pair NGC 6670". The Astronomical Journal. 122 (1): 140–162. arXiv: astro-ph/0103280 . Bibcode:2001AJ....122..140W. doi:10.1086/321112. S2CID   13900373.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.