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NGC 3758
Constellation
Leo
Right ascension 174.12 degrees
Declination 21.59 degrees
Redshift 0.029771
Heliocentric radial velocity 8,909 km/s
Distance 447
Mly (137
Mpc )
Apparent magnitude (V) 14.3
Type Sab pec, Sy1 Size 70,000 ly Notable features Rare example of binary
active galactic nucleus ,
seyfert galaxy
PGC 35905,
CGCG 126-110, KUG 1133+218,
MCG +04-27-073,
IRAS 11338+2152, REIZ 1338, PGC 165579, AKRAI J1136286+213546, RBS 1003,
NVSS J113629+213549, SFRS 149,
Mrk 739, 1RXS J113629.4+213552,
LEDA 35905
NGC 3758 known as the Owl Galaxy ,
[1] is a type Sb
[2]
spiral galaxy in the constellation of
Leo .
[3]
[4] It is located 447 million
light-years from the
Solar System and an approximate
diameter of 70,000 light-years.
[5] NGC 3758 was discovered by
Ralph Copeland on March 18, 1874, but also independently discovered by
Edouard Stephan ten years later.
[1]
Description
MUSE image of NGC 3758, showing [O III] as green (EELR) and
H-alpha as red (
star-forming regions )
NGC 3758 is classified as a
Seyfert 1 type galaxy.
[5]
[6] It is classified a
Markarian galaxy (designated Mrk 739), because compared to other galaxies its nucleus emits excessive amounts of
ultraviolet rays .
[7] It is a binary
active galactic nucleus galaxy, a rare example of a galaxy merger.
[8]
[9]
Sloan Digital Sky Survey image of NGC 3758. Notice the two luminous cores.
NGC 3758 is made up of two separate galaxies, NGC 3758W
[10] and NGC 3758E.
[11] Each of the two galaxies has a
supermassive black hole , which is only 11,000 light-years apart and gorging on
infalling gas .
[12] Both black holes are active, in which large amounts of
gas is sent spiraling inward, which it becomes hot and radiates
energy .
[9] The galaxies are
gravitationally bound together and such, their
orbits will dynamically decay until their nuclei
merge in which the process takes a few billion years.
[13]
The galaxy has an appearance of a friendly-looking object complete with two cores as the
eyes and a swirling grin.
[12] It is possible that binary black holes on the verge of merging in NGC 3758 can turn
stars into
hypervelocity stars and catapult them out of their host galaxy.
[14]
NGC 3758 contains an
extended emission-line region (EELR), which was discovered in the
Galaxy Zoo project. This EELR could originate from both AGN or from just one. Detailed
oxygen [O III] imaging could reveal which AGN is responsible for this EELR.
[15] ESO's VLT
MUSE instrument is capable of such observations and MUSE did observe NGC 3758 in 2016,
[16] but no publication about the MUSE data concerning the EELR exists as of May 2024.
References
^
a
b
"New General Catalog Objects: NGC 3750 - 3799" . cseligman.com . Retrieved 2024-04-30 .
^
"HyperLeda -object description" . atlas.obs-hp.fr . Retrieved 2024-04-30 .
^ Ford, Dominic.
"NGC3758 (Galaxy)" . In-The-Sky.org . Retrieved 2024-04-30 .
^
"Revised NGC Data for NGC 3758" . spider.seds.org . Retrieved 2024-04-30 .
^
a
b
"Your NED Search Results" . ned.ipac.caltech.edu . Retrieved 2024-04-30 .
^ Osterbrock, Donald E.; Shaw, Richard A. (1988).
"1988ApJ...327...89O Page 89" . The Astrophysical Journal . 327 : 89.
Bibcode :
1988ApJ...327...89O .
doi :
10.1086/166172 . Retrieved 2024-04-30 .
^
"Revised Data from NGC/IC Catalogue by Wolfgang Steinickle from NGC 3700 to 3799" . astrovalleyfield.ca . Retrieved 2024-04-30 .
^
"Object of the Week, April 1 2018----NGC 3758 "The Smiley Face Galaxy" " . www.deepskyforum.com . Retrieved 2024-04-30 .
^
a
b Wiessinger, Scott (2011-06-10).
"NASA Scientific Visualization Studio | Nearby Galaxy Boasts Two Monster Black Holes, Both Active" . NASA Scientific Visualization Studio . Retrieved 2024-04-30 .
^
"NED Search Results for NGC 3758W" . ned.ipac.caltech.edu . Retrieved 2024-04-30 .
^
"NED Search Results for NGC 3758E" . ned.ipac.caltech.edu . Retrieved 2024-04-30 .
^
a
b Lazaro, Enrico de (2021-04-27).
"Astronomers Observe Nearby Galaxy with Two Bright Cores | Sci.News" . Sci.News: Breaking Science News . Retrieved 2024-04-30 .
^ Mezcua, M.; Lobanov, A. P.; Mediavilla, E.; Karouzos, M. (2014-02-26).
"Photometric Decomposition of Mergers in Disk Galaxies" . The Astrophysical Journal . 784 (1): 16.
arXiv :
1401.5920 .
Bibcode :
2014ApJ...784...16M .
doi :
10.1088/0004-637x/784/1/16 .
ISSN
0004-637X .
^ Woo, Marcus.
"The Fastest Stars in the Universe May Approach Light Speed" . Wired .
ISSN
1059-1028 . Retrieved 2024-04-30 .
^ Keel, William C.; Chojnowski, S. Drew; Bennert, Vardha N.; Schawinski, Kevin; Lintott, Chris J.; Lynn, Stuart; Pancoast, Anna; Harris, Chelsea; Nierenberg, A. M.; Sonnenfeld, Alessandro; Proctor, Richard (2012-02-01).
"The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black hole accretion events" . Monthly Notices of the Royal Astronomical Society . 420 (1): 878–900.
arXiv :
1110.6921 .
Bibcode :
2012MNRAS.420..878K .
doi :
10.1111/j.1365-2966.2011.20101.x .
ISSN
0035-8711 .
^
"ESO Dataset - ADP.2016-07-26T07:11:27.413" . archive.eso.org . Retrieved 2024-05-01 .