Results 11 to 20 of about 1,111,126 (357)
Direct Detections of Young Stars in Nearby Elliptical Galaxies [PDF]
, 2012 Small amounts of star formation in elliptical galaxies are suggested by several results: surprisingly young ages from optical line indices, cooling X-ray gas, and mid-IR dust emission. Such star formation has previously been difficult to directly detect, but using UV Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) imaging, we have identified ...
Bregman, Joel N., Ford, H. Alyson
arxiv +3 more sources
Fast and inefficient star formation due to short-lived molecular clouds and rapid feedback. [PDF]
Nature, 2019 Kruijssen JMD +9 more
europepmc +2 more sources
Impact Induced Oxidation and Its Implications for Early Mars Climate
Geophysical Research Letters, 2023 H2 in a CO2 atmosphere may serve as a potential solution to the early Mars climate paradox, but its unknown sources cast doubts on the proposed mechanism. Impact cratering is an energetic process that may modify the surface redox budget.
Lu Pan, Zhengbin Deng, Martin Bizzarro
doaj +1 more source
The Astrophysical Journal Letters, 2023 We present a U-corrected Pb–Pb age of 4566.19 ± 0.20 Ma (1.11 ± 0.26 Myr after t _0 ) for the moderately volatile element rich, andesitic meteorite Erg Chech 002 (EC002). Our Al–Mg isochron defines a ^26 Al/ ^27 Al initial ratio of (8.65 ± 0.09) × 10 ^−6
J. N. Connelly +5 more
doaj +1 more source
The Astrophysical Journal, 2023 In protostellar cores, sulfur species are effective probes for the energetic environments, such as shocked regions. With the majority of sulfur depleted on dust grains, sulfur-bearing molecules could be liberated back to gas phase by shocks associated ...
Ziwei E. Zhang +7 more
doaj +1 more source
Triple Spiral Arms of a Triple Protostar System Imaged in Molecular Lines
The Astrophysical Journal, 2023 Most stars form in multiple-star systems. For a better understanding of their formation processes, it is important to resolve the individual protostellar components and the surrounding envelope and disk material at the earliest possible formation epoch ...
Jeong-Eun Lee +11 more
doaj +1 more source
Modeling Two First Hydrostatic Core Candidates Barnard 1b-N and 1b-S
The Astrophysical Journal, 2023 A first hydrostatic core (FHC) is proposed to form after the initial collapse of a prestellar core, as a seed of a Class 0 protostar. FHCs are difficult to observe because they are small, compact, embedded, and short lived.
Hao-Yuan Duan +3 more
doaj +1 more source
One, Two, Three ... An Explosive Outflow in IRAS 12326-6245 Revealed by ALMA
The Astrophysical Journal Letters, 2023 In the last years there has been a substantial increase in the number of the reported massive and luminous star-forming regions with related explosive outflows thanks to the superb sensitivity and angular resolution provided by the new radio, infrared ...
Luis A. Zapata +8 more
doaj +1 more source
Cloud-cloud collisions triggering star formation in galaxy simulations [PDF]
MNRAS, 527, 10077 (2024), 2023 Cloud-cloud collisions (CCCs) are expected to compress gas and trigger star formation. However, it is not well understood how the collisions and the induced star formation affect galactic-scale properties. By developing an on-the-fly algorithm to identify CCCs at each timestep in a galaxy simulation and a model that relates CCC-triggered star formation
arxiv +1 more source
Star formation in the multiverse [PDF]
Physical Review D, 2009 26 pages, 11 figures.
Raphael Bousso, Stefan Leichenauer
openaire +3 more sources