Results 71 to 80 of about 12,211 (252)

Evidence for Mass-dependent Evolution of Transitional Dwarf Galaxies in the Virgo Cluster

The Astrophysical Journal
The presence of transitional dwarf galaxies in cluster environments supports the hypothesis that infalling star-forming galaxies are transformed into quiescent early-type dwarf galaxies (ETdGs) through environmental effects.
Suk Kim, Soo-Chang Rey, Youngdae Lee
doaj   +1 more source

Witnessing a Transformation to Blue-cored Dwarf Early-type Galaxies in Filaments and the Cluster Outskirts: Gas-phase Abundances and Internal Kinematics Perspectives

The Astrophysical Journal, 2023
The presence of transitional dwarf galaxies in filaments and cluster outskirts may be closely related to preprocessing in the filament; however, the underlying mechanism is not yet comprehensively understood.
Jiwon Chung, Joon Hyeop Lee, Hyunjin Jeong, Suk Kim   +3 more
doaj   +1 more source

FIGGS: Faint Irregular Galaxies GMRT Survey

, 2007
The Faint Irregular Galaxies GMRT Survey (FIGGS) is a large program aimed at providing a comprehensive and statistically robust characterisation of the neutral ISM properties of faint (M_B > -14.5), nearby, gas rich, dwarf irregular galaxies using the ...
Begum, Ayesha, Chengalur, Jayaram N., Kaisin, S. S., Karachentsev, I. D., Sharina, Margarita   +4 more
core   +1 more source

Mass‐Loss, Composition and Observational Signatures of Stellar Winds From X‐Ray Bursts

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT X‐Ray bursts (XRBs) are powerful thermonuclear events on the surface of accreting neutron stars (NSs), which can synthesize intermediate‐mass elements. Although the high surface gravity prevents an explosive ejection, a small fraction of the envelope may be ejected by radiation‐driven winds.
Yago Herrera, Daniel Muñoz Vela, Gloria Sala, Jordi José, Yuri Cavecchi   +4 more
wiley   +1 more source

Chemodynamical Simulations of Dwarf Galaxy Evolution

Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014
In this review I give a summary of the state of the art for what concerns the chemo‐dynamical numerical modelling of galaxies in general and of dwarf galaxies in particular. In particular, I focus my attention on (i) initial conditions, (ii) the equations to solve; (iii) the star formation process in galaxies, (iv) the initial mass function, (v) the ...
Simone Recchi, José Manuel Vílchez Medina   +1 more
wiley   +1 more source

Stellar Populations in the Local Group of Galaxies

, 2005
The characteristics and properties of the stellar populations and evolutionary histories of Local Group galaxies are summarized and compared to predictions of cosmological models.
Grebel, Eva K.
core   +2 more sources

Identifying Old Tidal Dwarf Irregulars [PDF]

, 2000
We examine the observational consequences of the two possible origins for irregular galaxies: formation from collapse of a primordial cloud of gas early in the age of the Universe, and formation from tidal tails in an interaction that could have occured ...
Bottinelli L., Broeils A. H., de Blok W. J. G., Deidre A. Hunter, Duc P.-A., Edmunds M. G., Erin W. Roye, Ferraro F. R., Israel F., Lee H., McIntyre V. J., Mirabel I. F., Mirabel I. F., Sally D. Hunsberger, Skillman E. D., Tully R. B., Zwicky F.   +16 more
core   +3 more sources

Chemical evolution of dwarf irregular and blue compact galaxies [PDF]

Astronomy & Astrophysics, 2011
Dwarf irregular and blue compact galaxies are very interesting objects since they are relatively simple and unevolved. We present new models for the chemical evolution of these galaxies by assuming different regimes of star formation (bursting and continuous) and different kinds of galactic winds (normal and metal-enhanced).
Yin, J., MATTEUCCI, MARIA FRANCESCA, Vladilo, G.   +2 more
openaire   +5 more sources

Commodity risk assessment of Betula pendula and Betula pubescens plants from the UK

EFSA Journal, Volume 22, Issue 11, November 2024.
Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Betula pendula and B.
EFSA Panel on Plant Health (PLH), Antonio Vicent Civera, Paula Baptista, Anna Berlin, Elisavet Chatzivassiliou, Jaime Cubero, Nik Cunniffe, Eduardo de la Peña, Nicolas Desneux, Francesco Di Serio, Anna Filipiak, Beata Hasiów‐Jaroszewska, Hervé Jactel, Blanca B. Landa, Lara Maistrello, David Makowski, Panagiotis Milonas, Nikos T. Papadopulos, Roel Potting, Hanna Susi, Dirk Jan Van Der Gaag, Andrea Battisti, Claude Bragard, Christer Sven Magnusson, Hugo Mas, Daniel Rigling, Massimo Faccoli, Alžběta Mikulová, Fabio Stergulc, Eugen Christoph, Olaf Mosbach‐Schulz, Franz Streissl, Paolo Gonthier   +32 more
wiley   +1 more source

Astronomical Signatures of Dark Matter

Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014
Several independent astronomical observations in different wavelength bands reveal the existence of much larger quantities of matter than what we would deduce from assuming a solar mass to light ratio. They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of ...
Paul Gorenstein, Wallace Tucker, Anselmo Meregaglia   +2 more
wiley   +1 more source