Results 71 to 80 of about 13,046,567 (395)

Scaling Properties of a Complete X-ray Selected Galaxy Group Sample [PDF]

, 2014
Upcoming X-ray surveys like eROSITA require precise calibration between X-ray observables and mass down to the low mass regime to set tight constraints on the fundamental cosmological parameters.
L. Lovisari, T. Reiprich, G. Schellenberger   +2 more
semanticscholar   +1 more source

A Second Galaxy Missing Dark Matter in the NGC 1052 Group [PDF]

Astrophysical Journal, 2019
The ultra-diffuse galaxy NGC1052-DF2 has a very low velocity dispersion, indicating that it has little or no dark matter. Here we report the discovery of a second galaxy in this class, residing in the same group. NGC1052-DF4 closely resembles NGC1052-DF2
P. V. van Dokkum, S. Danieli, R. Abraham, C. Conroy, A. Romanowsky   +4 more
semanticscholar   +1 more source

The zCOSMOS redshift survey: how group environment alters global downsizing trends [PDF]

, 2009
Context. Groups of galaxies are a common environment, bridging the gap between starforming field galaxies and quiescent cluster galaxies. Within groups secular processes could be at play, contributing to the observed strong decrease of star formation ...
Abbas, U., Bardelli, S., Bolzonella, M., Bongiorno, A., Bottini, D., Cappi, A., Caputi, K., Carollo, C. M., Cassata, P., Cimatti, A., Contini, T., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Finoguenov, A., Franzetti, P., Garilli, B., Guzzo, L., Halliday, C., Iovino, A., Kampczyk, P., Kneib, J.-P., Knobel, C., Koekemoer, A. M., Kovač, K., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Le Fèvre, O., Leauthaud, A., Lilly, S., Maccagni, D., Maier, C., Mainieri, V., Marinoni, C., McCracken, H. J., Memeo, P., Meneux, B., Mignoli, M., Oesch, P., Pellò, R., Peng, Y., Porciani, C., Pozzetti, L., Pérez-Montero, E., Renzini, A., Ricciardelli, E., Scaramella, R., Schiminovich, D., Scodeggio, M., Scoville, N., Silverman, J. D., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., Zamorani, G., Zucca, E.   +58 more
core   +6 more sources

SEARCHING FOR DIFFUSE LIGHT IN THE M96 GALAXY GROUP [PDF]

, 2014
We present deep, wide-field imaging of the M96 galaxy group (also known as the Leo I Group). Down to surface brightness limits of μB = 30.1 and μV = 29.5, we find no diffuse, large-scale optical counterpart to the “Leo Ring,” an extended H i ring ...
A. Watkins, J. C. Mihos, P. Harding, J. Feldmeier   +3 more
semanticscholar   +1 more source

HCG 57: Evidence for Shock-heated Intergalactic Gas from X-Rays and Optical Emission Line Spectroscopy

The Astrophysical Journal
We present Chandra and XMM-Newton X-ray observations of the compact group HCG 57, and optical integral field spectroscopy of the interacting galaxy pair HCG 57A/D.
Ewan O’Sullivan, P. N. Appleton, B. A. Joshi, Lauranne Lanz, Katherine Alatalo, Jan M. Vrtilek, Andreas Zezas, Laurence P. David   +7 more
doaj   +1 more source

The stripping of a galaxy group diving into the massive cluster A2142 [PDF]

, 2014
Structure formation in the current Universe operates through the accretion of group-scale systems onto massive clusters. The detection and study of such accreting systems is crucial to understand the build-up of the most massive virialized structures we ...
D. Eckert, D. Eckert, S. Molendi, M. Owers, M. Gaspari, T. Venturi, L. Rudnick, S. Ettori, S. Paltani, F. Gastaldello, F. Gastaldello, M. Rossetti, M. Rossetti   +12 more
semanticscholar   +1 more source

Galaxy pairs in the Local Group [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2013
Abstract Current models of galaxy formation predict that galaxy pairs of comparable magnitudes should become increasingly rare with decreasing luminosity. This seems at odds with the relatively high frequency of pairings among dwarf galaxies in the Local Group. We use literature data to show that ∼30 per cent of all the satellites of the
Fattahi, Azadeh, Navarro, Julio F., Starkenburg, Else, Barber, Christopher R., McConnachie, Alan W.   +4 more
openaire   +3 more sources

Triazine‐Trione Thermosets with High Processability for Scaffold Applications in Bone Tissue Engineering

Advanced Healthcare Materials, EarlyView.
Novel photo‐clickable triazine‐trione thermosets can be shaped and cured under mild conditions, including room and physiological temperatures. These materials are biocompatible and support osteogenic differentiation of bone marrow–derived mesenchymal stem cells on their surface.
Åshild Johansen, Shuntaro Yamada, Daniel J. Hutchinson, Mohammed A. Yassin, Samih Mohamed‐Ahmed, Cecilie Gjerde, Michael Malkoch, Kamal Mustafa   +7 more
wiley   +1 more source

Dwarf galaxies in the Dynamically Evolved NGC 1407 Group

, 2006
The NGC 1407 Group stands out among nearby structures by its properties that suggest it is massive and evolved. It shares properties with entities that have been called fossil groups: the 1.4 magnitude differential between the dominant elliptical galaxy ...
Mahdavi, Andisheh, Trentham, Neil, Tully, R. Brent   +2 more
core   +1 more source

The bow shock, cold fronts and disintegrating cool core in the merging galaxy group RX J0751.3+5012 [PDF]

, 2014
We present a new Chandra X-ray observation of the off-axis galaxy group merger RX J0751.3+5012. The hot atmospheres of the two colliding groups appear highly distorted by the merger. The images reveal arc-like cold fronts around each group core, produced
H. Russell, H. Russell, A. Fabian, B. McNamara, B. McNamara, B. McNamara, A. Edge, Jeremy S. Sanders, P. Nulsen, S. Baum, M. Donahue, C. O’Dea   +11 more
semanticscholar   +1 more source