Results 81 to 90 of about 30,270 (299)

NGC741 - Mergers and AGN feedback on galaxy group scale [PDF]

, 2017
Low mass systems play an essential role in upcoming cosmological studies like eROSITA. Though the effects of AGNs and merging processes are of special importance to quantify biases like selection effects or deviations from hydrostatic equilibrium, they ...
Raychaudhury, Somak, O'Sullivan, Ewan (5373796), Vrtilek, Jan, Vrtilek, Jan (5373808), Giacintucci, Simona, Duchesne, Stefan, David, Laurence, O'Sullivan, Ewan, Schellenberger, Gerrit (5373793), Schellenberger, Gerrit, David, Laurence (5373802), Johnston-Hollitt, Melanie, Giacintucci, Simona (5373799), Johnston-Hollitt, Melanie (5373790), Duchesne, Stefan (5373805), Raychaudhury, Somak (5373811)   +15 more
core   +1 more source

Revisiting Ram Pressure Stripping in Wolf–Lundmark–Melotte: No Evidence for Stripped H I with Local Group L-Band Survey

The Astronomical Journal
We analyze H i 21 cm observations of the Local Group dwarf galaxy Wolf–Lundmark–Melotte (WLM) from the Local Group L -Band Survey to search for evidence of ram pressure stripping.
Daniel R. Rybarczyk, Eric W. Koch, Fabian Caballero Vargas, Snežana Stanimirović, Nickolas M. Pingel, Julianne J. Dalcanton, Adam K. Leroy, Erik W. Rosolowsky, Michael P. Busch, Chang-Goo Kim, Adam Smercina, Elizabeth Tarantino, Vicente Villanueva, Alberto D. Bolatto, Thomas G. Williams   +14 more
doaj   +1 more source

Hierarchical assembly in action: A galaxy tail from a disrupting group in the Virgo cluster outskirts

Astronomy & Astrophysics
Context. Group environments are thought to play a key role in shaping galaxy evolution prior to cluster accretion. However, direct observational evidence linking group–cluster interactions to the transformation of low-mass galaxies remains scarce.
Aguerri J. Alfonso L., Zarattini Stefano, Cuomo Virginia, Morelli Lorenzo   +3 more
doaj   +1 more source

Elemental Abundances in M31: Individual and Coadded Spectroscopic [Fe/H] and [α/Fe] throughout the M31 Halo with SPLASH

The Astrophysical Journal, 2023
We present spectroscopic chemical abundances of red giant branch stars in Andromeda (M31), using medium-resolution ( R ∼ 6000) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo survey.
J. Leigh Wojno, Karoline M. Gilbert, Evan N. Kirby, Ivanna Escala, Puragra Guhathakurta, Rachael L. Beaton, Jason Kalirai, Masashi Chiba, Steven R. Majewski   +8 more
doaj   +1 more source

Germanium‐Based Mid‐Infrared Integrated Photonics

Laser &Photonics Reviews, EarlyView.
The mid‐infrared (mid‐IR) spectral range is a part of the electromagnetic spectrum in which most of the molecules have vibrational and rotational resonances. Photonics integration in this wavelength range have thus seen a burst of interest in the recent years, mainly driven by applications related with the detection of chemical and biological ...
Delphine Marris‐Morini, Goran Z. Mashanovich, Milos Nedeljkovic, Carlos Alonso‐Ramos, Laurent Vivien, Jacopo Frigerio, Giovanni Isella   +6 more
wiley   +1 more source

Statistical methods in weak gravitational lensing [PDF]

, 2015
This thesis studies several topics in the area of weak gravitational lensing and addresses some key statistical problems within this subject. A large part of the thesis concerns the measurement of galaxy shapes for weak gravitational lensing and the ...
Kacprzak, T
core  

A Massive Quiescent Galaxy in a Group Environment at z = 4.53

The Astrophysical Journal
We report on the spectroscopic confirmation of a massive quiescent galaxy at z _spec = 4.53 in the COSMOS field. The object was first identified as a galaxy with suppressed star formation at z _phot ∼ 4.65 from the COSMOS2020 catalog.
Takumi Kakimoto, Masayuki Tanaka, Masato Onodera, Rhythm Shimakawa, Po-Feng Wu, Katriona M. L. Gould, Kei Ito, Shuowen Jin, Mariko Kubo, Tomoko L. Suzuki, Sune Toft, Francesco Valentino, Kiyoto Yabe   +12 more
doaj   +1 more source

THE LOCAL DWARF GALAXIES:BUILDING BLOCKS OFMASSIVE ONES? I.THE FORNAX DWARF GALAXY

Odessa Astronomical Publications, 2008
A chemical evolution of the Local Group dwarf galaxy Fornax is considered in the framework of the merger scenario. We suppose a galactic stellar halo to be formed as separate fragments which then merge; thus, we can calculate the set of such the ...
T. V. Nykytyuk
doaj   +1 more source

Patterns of wild meat and other protein consumption in the periphery of Salonga National Park, Democratic Republic of the Congo

People and Nature, EarlyView.
Abstract In Central Africa, human activities are severely impacting terrestrial and aquatic wildlife, threatening the food security of millions of people. Accordingly, sustainable use of wildlife is crucial for the nutrition and livelihoods of many rural communities in the region.
Zolo Admettons, Mattia Bessone, Josué Ausse Baraka, Josué Engombe Botomia, Espérance Miezi, Bénédicte Nsilu, Jonathan Nkamisha Mukole, Michel Opelele Omeno, Jean Semeki Ngabinzeke, Barbara Fruth   +9 more
wiley   +1 more source

Understanding The Galaxy-Halo Connection Through Galaxy Group Catalogues [PDF]

, 2019
The Universe is comprised of structures on all scales, ranging from stars and planets to galaxies and clusters. These structures form part of a much bigger web-like structure built with systems of galaxies, filaments, walls, and cosmic voids between ...
Calderon Arrivillaga, Victor Francisco
core