Molecular gas and star formation in the tidal dwarf galaxy VCC 2062
نویسندگان
چکیده
منابع مشابه
Molecular gas and star formation in the tidal dwarf galaxy VCC 2062
The physical mechanisms driving star formation (SF) in galaxies are still not fully understood. Tidal dwarf galaxies (TDGs), made of gas ejected during galaxy interactions, seem to be devoid of dark matter and have a near-solar metallicity. The latter makes it possible to study molecular gas and its link to SF using standard tracers (CO, dust) in a peculiar environment. We present a detailed st...
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Context. Numerical simulations predict the existence of old Tidal Dwarf Galaxies (TDGs) that would have survived several Gyr after the collision lying at their origin. Such survivors, which would by now have become independent relaxed galaxies, would be ideal laboratories, if nearby enough, to tackle a number of topical issues, including the distribution of Dark Matter in and around galaxies. H...
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We investigate the process of galaxy formation as can be observed in the only currently forming galaxies – the so-called Tidal Dwarf Galaxies, hereafter TDGs – through observations of the molecular gas detected via its CO (Carbon Monoxide) emission. Molecular gas is a key element in the galaxy formation process, providing the link between a cloud of gas and a bona fide galaxy. We have now detec...
متن کاملMolecular gas in Tidal Dwarf Galaxies: Exploring the conditions for star formation
Tidal Dwarf Galaxies (TDGs), produced from material expelled in galactic interactions, are well–suited to test the laws of star formation (SF) due to their simple structure, high metallicity – making CO a reliable tracer of the molecular gas content – and recent SF. Here, we study the conditions for the onset of SF and for the rate at which SF proceeds once above a threshold in a small sample o...
متن کاملThe Interacting Dwarf Galaxy NGC3077: The Interplay of Atomic and Molecular Gas with Violent Star Formation
We present a comprehensive multi–wavelength study of the nearby interacting dwarf galaxy NGC3077 (member of the M81 triplet). High resolution VLA H I observations show that most of the atomic gas (∼90%) around NGC3077 is situated in a prominent tidal arm with a complex velocity structure. Little H I (∼ 5× 10M⊙) is associated with NGC3077 itself. High resolution OVRO observations of the molecula...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2016
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201527887