Results 71 to 80 of about 318,054 (345)

Signatures of Mass Segregation from Competitive Accretion and Monolithic Collapse

The Astrophysical Journal
The two main competing theories proposed to explain the formation of massive (>10 M _⊙ ) stars—competitive accretion and monolithic core collapse—make different observable predictions for the environment of the massive stars during, and immediately after,
Richard J. Parker, Emily J. Pinson, Hayley L. Alcock, James E. Dale   +3 more
doaj   +1 more source

Locating Star-Forming Regions in Quasar Host Galaxies

, 2013
We present a study of the morphology and intensity of star formation in the host galaxies of eight Palomar-Green quasars using observations with the Hubble Space Telescope.
Ciardullo, R., Eracleous, M., Gronwall, C., Lutz, Dieter, Netzer, H., Shemmer, O., Sturm, Eckhard, Young, J. E.   +7 more
core   +2 more sources

Cluster-formation in the Rosette molecular cloud at the junctions of filaments [PDF]

, 2012
For many years feedback processes generated by OB-stars in molecular clouds, including expanding ionization fronts, stellar winds, or UV-radiation, have been proposed to trigger subsequent star formation.
A. Men’shchikov, A. Zavagno, André, Arzoumanian, Ballesteros-Paredes, Bohlin, C. Fallscheer, C. Federrath, Csengeri, D. Arzoumanian, D. Elia, D. Russeil, D. Ward-Thompson, Dale, Elmegreen, F. Motte, Federrath, Federrath, G. White, Griffin, Heiderman, Hennemann, Hill, J. Di Francesco, J. Kirk, J.-Ph. Bernard, Jackson, Klessen, L. Testi, Lada, M. Attard, M. Griffin, M. Hennemann, M. Pestalozzi, Mac Low, McKee, Motte, Motte, N. Peretto, N. Schneider, Nguyen Luong, P. Didelon, P. Martin, P. Palmeirim, P. Tremblin, Ph. André, Phelps, Pilbratt, Poglitsch, Poulton, Q. Nguyen-Luong, R. Klessen, Román-Zúñiga, S. Bontemps, S. Sadavoy, Schneider, Schneider, Schneider, Shetty, Sousbie, Starck, T. Csengeri, T. Hill, T. Sousbie, V. Könyves, V. Minier, Vázquez-Semadeni, Williams, Zavagno   +68 more
core   +9 more sources

Chemical Processes in Star Forming Regions [PDF]

, 2008
This paper will review the basic concepts of gas-phase and grain surface chemistry of dense molecular clouds, where low mass and high mass stars form. The chemistry of cold pre-stellar cloud cores, where molecular freeze-out and deuterium fractionation dominate, will be presented.
openaire   +3 more sources

On the origin of phosphorus nitride in star-forming regions [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2018
Abstract We present multitransition observations of phosphorus nitride (PN) towards a sample of nine massive dense cores in different evolutionary stages. Using transitions with different excitation conditions, we have found for the first time that the excitation temperatures of PN are in the range ∼5–30 K.
M. T. Beltrán, Anton Vasyunin, Anton Vasyunin, C. Mininni, Francesco Fontani, Victor M. Rivilla, Paola Caselli   +6 more
openaire   +4 more sources

Evolutionary interplay between viruses and R‐loops

FEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi, Zita Képes, Zoltán Szabó, Eszter Csoma, Lóránt Székvölgyi   +4 more
wiley   +1 more source

Direct Observational Evidence of Multi-epoch Massive Star Formation in G24.47+0.49

The Astrophysical Journal Letters
Using new continuum and molecular line data from the Atacama Large Millimeter/submillimeter Array Three-millimeter Observations of Massive Star-forming Regions (ATOMS) survey and archival Very Large Array, 4.86 GHz data, we present direct observational ...
Anindya Saha, Anandmayee Tej, Hong-Li Liu, Tie Liu, Guido Garay, Paul F. Goldsmith, Chang Won Lee, Jinhua He, Mika Juvela, Leonardo Bronfman, Tapas Baug, Enrique Vázquez-Semadeni, Patricio Sanhueza, Shanghuo Li, James O. Chibueze, N. K. Bhadari, Lokesh K. Dewangan, Swagat Ranjan Das, Feng-Wei Xu, Namitha Issac, Jihye Hwang, L. Viktor Tóth   +21 more
doaj   +1 more source

Unusually Powerful Flare Phenomenon of the Water Maser in W51 and the Possibility of Detecting Gravitational Radiation from It

The Astrophysical Journal, 2023
Because of detailed monitoring of the 22.2 GHz water maser, carried out from 2021 October to 2023 May, a very powerful flare phenomenon was detected in the galactic object W51 near the radial velocity of 60 km s ^−1 with the amplitude of 140 kJy.
A. E. Volvach, L. N. Volvach, M. G. Larionov   +2 more
doaj   +1 more source

Signatures of inflow motion in cores of massive star formation: Potential collapse candidates

, 2007
Using the IRAM 30 m telescope, a mapping survey in optically thick and thin lines was performed towards 46 high mass star-forming regions. The sample includes UC H{\sc ii} precursors and UC H{\sc ii} regions.
Brand J., Christian Henkel, Hatchell J., Martin Miller, Molinari S., Rui Xue, Tieftrunk A. R., Xin Guan, Yuefang Wu   +8 more
core   +1 more source

Purification tags markedly affect self‐aggregation of CPEB3

FEBS Letters, EarlyView.
Although recombinant proteins are used to study protein aggregation in vitro, uncleaved tags can interfere with accurate interpretation. Our findings demonstrate that His₆‐GFP and His₁₂ tags significantly affect liquid droplet and amyloid fibril formation in the intrinsically disordered region (IDR) of mouse cytoplasmic polyadenylation element‐binding ...
Harunobu Saito, Yujin Lee, Motoharu Ueno, Naotaka Sekiyama, Masatomo So, Ayako Furukawa, Kenji Sugase   +6 more
wiley   +1 more source