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Antennae - Subaru and HST

Technical card

Resolution: 6570x5853

Astrometry.net job: 1551994

RA center: 180.456 degrees

DEC center: -18.890 degrees

Pixel scale: 0.217 arcsec/pixel

Orientation: -90.275 degrees

Field radius: 0.265 degrees

Description

Antennae

Here in the following a new assembling using data from ground-based observations recorded by the Subaru telescope at Mauna Kea (Hawaii) and space data from the HST.
The assembled filters from Subaru are:

- Rc -> approx. 200 panels
- B -> approx. 200 panels
- G -> synth. as 0.5(Rc+B)

HST close-up on NGC4038 and NGC4039 has been created with the following filters:

- F435W: 4x548"
- F550M: 6x424"
- F658N: 4x575"
- F814W: 4x420"

Data: NASA/ESA/NAOJ
Assembling and processing: R. Colombari
_________________________________

The Antennae Galaxies, also known as NGC 4038/NGC 4039, 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.[3] NGC 4038 is located at RA 12h 01m 53.0s, Dec −18° 52′ 10″; and NGC 4039 at RA 12h 01m 53.6s, Dec −18° 53′ 11″.

The Antennae Galaxies are undergoing a galactic collision. Located in the NGC 4038 group with five other galaxies, these two galaxies are known as the Antennae Galaxies because the two long tails of stars,
gas and dust ejected from the galaxies as a result of the collision resemble an insect's antennae.
The nuclei of the two galaxies are joining to become one giant galaxy. Most galaxies probably undergo at least one significant collision in their lifetimes. This is likely the future of our Milky Way when it collides with the Andromeda Galaxy.
Five supernovae have been discovered in NGC 4038: SN 1921A, SN 1974E, SN 2004GT, SN 2007sr and SN 2013dk.[4]
A recent study finds that these interacting galaxies are less remote from the Milky Way than previously thought—at 45 million light-years instead of 65 million light-years.[5]
They are located 0.25° north of 31 Crateris and 3.25° southwest of Gamma Corvi.[6]
The Antennae galaxies also contain a relatively young collection of massive globular clusters that were possibly formed as a result of the collision between the two galaxies. [7]
The young age of these clusters is in contrast to the average age of most known globular clusters, around 12 billion years old,
with the formation of the globulars likely originating from shockwaves, generated by the collision of the galaxies, compressing large, massive molecular clouds.
The densest regions of the collapsing and compressing clouds are believed to be the birthplace of the clusters.

Source: Wikipedia

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Author

Roberto Colombari
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Antennae - Subaru and HST, Roberto Colombari

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