Results 101 to 110 of about 1,116,232 (311)

Playing with positive feedback: external pressure-triggering of a star-forming disc galaxy

, 2015
Feedback in massive galaxies generally involves quenching of star formation, a favored candidate being outflows from a central supermassive black hole.
Bieri, Rebekka, Dubois, Yohan, Mamon, Gary A., Silk, Joseph   +3 more
core   +2 more sources

Revealing Multiple Nested Molecular Outflows with Rotating Signatures in HH270mms1-A with ALMA

The Astrophysical Journal
We present molecular line observations of the protostellar outflow associated with HH270mms1 in the Orion B molecular cloud with ALMA. The ^12 CO ( J = 3−2) emissions show that the outflow velocity structure consists of four distinct components of low ...
Mitsuki Omura, Kazuki Tokuda, Masahiro N. Machida   +2 more
doaj   +1 more source

The Role of Magnetic Fields in the Formation of Protostellar Discs

Frontiers in Astronomy and Space Sciences, 2018
The formation of a protostellar disc is a natural outcome during the star formation process. As gas in a molecular cloud core collapses under self-gravity, the angular momentum of the gas will slow its collapse on small scales and promote the formation ...
James Wurster, Zhi-Yun Li
doaj   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

FEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

Star formation history and environment of the dwarf galaxy UGCA 92

, 2012
We present a quantitative star formation history of the nearby dwarf galaxy UGCA 92. This irregular dwarf is situated in the vicinity of the Local Group of galaxies in a zone of strong Galactic extinction (IC 342 group of galaxies).
Angeretti, Barmina, Begum, de Vaucouleurs, Dmitry Makarov, Dolphin, Ellis, Girardi, Girardi, Grocholski, Hodge, Hoessel, Hunter, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentseva, Kenyon, Kingsburgh, Lidia Makarova, Makarov, Makarov, Makarov, Makarova, Makarova, Paturel, Rizzi, Ryś, Salpeter, Schlegel, Sergey Savchenko, Sharina, Stil, Stil, Stil, Tully, Vaduvescu, Vallenari, Walter   +42 more
core   +1 more source

Constraints on the Distribution of Gas and Young Stars in the Galactic Centre in the Context of Interpreting Gamma Ray Emission Features

Galaxies, 2018
Gamma ray observations have found evidence of an extremely energetic outflow emanating from the Galactic Centre, and an ‘excess’ of emission at GeV energies towards the Galactic Centre over that expected from current models.
Steven N. Longmore, J. M. Diederik Kruijssen   +1 more
doaj   +1 more source

Unraveling Mycobacterium tuberculosis acid resistance and pH homeostasis mechanisms

FEBS Letters, EarlyView.
Mycobacterium tuberculosis exhibits a remarkable resilience to acid stress. In this Review, we discuss some of the molecular mechanisms and metabolic pathways used by the tubercle bacilli to adapt and resist host‐mediated acid stress. Mycobacterium tuberculosis (Mtb) is a successful pathogen that has developed a variety of strategies to survive and ...
Janïs Laudouze, Stéphane Canaan, Alexandre Gouzy, Pierre Santucci   +3 more
wiley   +1 more source

Star Formation: Lessons from Taurus [PDF]

arXiv, 2000
The Taurus molecular cloud complex is the paradigm for quiescent, low-density, isolated star formation. Yet the age distribution of its stellar population indicates that star formation is a rapid and dynamic process, inconsistent with the old picture of magnetically-controlled protostellar cloud collapse. Instead, Taurus seems to have formed stars in a
arxiv  

Starbursts in isolated galaxies. I. The influence of stellar birth function and IMF

, 2009
Starbursts and substantial variations in the star formation histories are a common phenomenon in galaxies. We study the stability properties of isolated star-forming dwarf galaxies with the aim of identifying starburst modes.
Bekki, Berczik, Blitz, Burkert, Buyle, Böhringer, Ch. Theis, Dalgarno, Di Matteo, Dohm-Palmer, Ehlerová, Gallagher, Gerola, Greggio, Harfst, Hensler, Hosokawa, Hosokawa, Ikeuchi, J. Köppen, Köppen, Köppen, Köppen, Nikolic, Pelupessy, Quillen, Samland, Sanders, Scalo, Theis, Theis, van Zee, Weidner   +32 more
core   +1 more source

PHANGS-HST Catalogs for ∼100,000 Star Clusters and Compact Associations in 38 Galaxies. I. Observed Properties

The Astrophysical Journal Supplement Series
We present the largest catalog to date of star clusters and compact associations in nearby galaxies. We have performed a V -band-selected census of clusters across the 38 spiral galaxies of the PHANGS–Hubble Space Telescope (HST) Treasury Survey, and ...
Daniel Maschmann, Janice C. Lee, David A. Thilker, Bradley C. Whitmore, Sinan Deger, Médéric Boquien, Rupali Chandar, Daniel A. Dale, Aida Wofford, Stephen Hannon, Kirsten L. Larson, Adam K. Leroy, Eva Schinnerer, Erik Rosolowsky, Leonardo Úbeda, Ashley T. Barnes, Eric Emsellem, Kathryn Grasha, Brent Groves, Rémy Indebetouw, Hwihyun Kim, Ralf S. Klessen, Kathryn Kreckel, Rebecca C. Levy, Francesca Pinna, M. Jimena Rodríguez, Qiushi Tian, Thomas G. Williams   +27 more
doaj   +1 more source