Počet záznamů: 1  

Colliding interstellar bubbles in the direction of l=54 degrees

  1. 1.
    0471443 - ASÚ 2017 RIV FR eng J - Článek v odborném periodiku
    Zychová, L. - Ehlerová, Soňa
    Colliding interstellar bubbles in the direction of l=54 degrees.
    Astronomy & Astrophysics. Roč. 595, November (2016), A49/1-A49/9. ISSN 0004-6361. E-ISSN 1432-0746
    Grant CEP: GA MŠMT LG14013; GA ČR GAP209/12/1795
    Institucionální podpora: RVO:67985815
    Klíčová slova: ISM bubbles * clouds * HII regions
    Obor OECD: Astronomy (including astrophysics,space science)
    Impakt faktor: 5.014, rok: 2016

    We compare infrared observations of bubbles N115, N116 and N117 with atomic, molecular and ionized gas in this region. While determining the dynamical properties of the bubbles, we also look into their ambient environment to understand their formation in a wider context. We identified two systems of bubbles: the first, the background system, is formed by large structures G053.9 + 0.2 and SNR G054.4-0.3 and the infrared bubble N116 + 117. The second, the foreground system, includes the infrared bubble N115 and two large HI bubbles, which we discovered in the HI data. Both systems are independent, lying at different distances, but look similar. They are both formed by two large colliding bubbles with radii around 20-30 pc and ages of a few million years. A younger and smaller (similar to 4 pc, less than a million years) infrared bubble lies at the position of the collision. We found that both infrared bubbles N115 and N116 + 117 are associated with the collisions of larger and older bubbles. We propose that such collisions increase the probability of further star formation, probably by squeezing the interstellar material, suggesting that they are an important mechanism for star formation.
    Trvalý link: http://hdl.handle.net/11104/0268828

     
     
Počet záznamů: 1  

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