Star Formation in Interacting Galaxies

Struck, Curtis

doi:10.1017/s1743921311000834

Cited by 1 publication

(1 citation statement)

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“…The area of the significant velocity gradient on the right side of the velocity profile corresponds to the bright region of intense star formation located where the spiral arm of NGC 4017 transforms into the tail. This is the example of so-called 'henge clumps' (Hancock et al 2009;Struck 2011). Such features within a galaxy disc may arise near the base of tidal tails, where the crossing zones (caustics) of stellar orbits were formed as the result of intersecting stellar streams.…”

Section: Gas Kinematics Of the Tdg And Tidal Tailmentioning

confidence: 99%

Young stellar clumps in the interacting system Arp 305

Засов

Saburova

Egorov

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We present the results of optical long-slit spectral observations of interacting system Arp305 carried out at the 6m telescope BTA at the SAO RAS: the radial variation of gas kinematics and oxygen abundance. This study continues the series of spectral observations of tidal debris in the interacting galaxies. Here we pay special attention to the star-forming region between the interacting galaxies -a tidal dwarf galaxy (TDG) candidate. This star-forming system appears to be gravitationally bound or close to this condition. We show that TDG is metal poor in comparison to the parental galaxy. It can indicate that either the origin of star-forming gas of TDG was very far from the centre of parent galaxy or its gas has been diluted by the accretion of metal poor intergalactic gas. Nevertheless the region of the brightest emission clump in TDG where a current star formation takes place reveals a noticeable colour excess evidencing a local gas concentration. We pay attention that TDG is situated in the region of intersection of two gas flows and is in a process of formation probably caused by the collision of these flows. Low velocity difference between TDG, NGC 4017 and the gaseous bridge between them evidences that the lifetime of TDG is restricted by the time of its fall back onto the parent galaxy.

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Section: Gas Kinematics Of the Tdg And Tidal Tailmentioning

confidence: 99%