Results 131 to 140 of about 10,243 (231)

Strong He i Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

The Astrophysical Journal
We present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He i λ ...
Hiroto Yanagisawa, Masami Ouchi, Kuria Watanabe, Akinori Matsumoto, Kimihiko Nakajima, Hidenobu Yajima, Kentaro Nagamine, Koh Takahashi, Minami Nakane, Nozomu Tominaga, Hiroya Umeda, Hajime Fukushima, Yuichi Harikane, Yuki Isobe, Yoshiaki Ono, Yi Xu, Yechi Zhang   +16 more
doaj   +1 more source

Euclid preparation

Astronomy & Astrophysics
Local Universe dwarf galaxies can serve as both cosmological and mass assembly probes. Deep surveys have enabled the study of these objects down to the low surface brightness (LSB) regime.
Urbano M., Duc P.-A., Poulain M., Nucita A. A., Venhola A., Marchal O., Kümmel M., Kong H., Soldano F., Romelli E., Walmsley M., Saifollahi T., Voggel K., Lançon A., Marleau F. R., Sola E., Hunt L. K., Junais J., Carollo D., Sanchez-Alarcon P. M., Baes M., Buitrago F., Cantiello M., Cuillandre J.-C., Domínguez Sánchez H., Ferré-Mateu A., Franco A., Gracia-Carpio J., Habas R., Hilker M., Iodice E., Knapen J. H., Le M. N., Martínez-Delgado D., Müller O., De Paolis F., Papaderos P., Ragusa R., Román J., Saremi E., Testa V., Altieri B., Amendola L., Andreon S., Auricchio N., Baccigalupi C., Baldi M., Bardelli S., Battaglia P., Biviano A., Branchini E., Brescia M., Camera S., Cañas-Herrera G., Capobianco V., Carbone C., Carretero J., Casas S., Castellano M., Castignani G., Cavuoti S., Cimatti A., Colodro-Conde C., Congedo G., Conselice C. J., Conversi L., Copin Y., Courbin F., Courtois H. M., Cropper M., Da Silva A., Degaudenzi H., De Lucia G., Dole H., Dubath F., Duncan C. A. J., Dupac X., Dusini S., Escoffier S., Farina M., Farinelli R., Ferriol S., Finelli F., Frailis M., Franceschi E., Fumana M., Galeotta S., George K., Gillis B., Giocoli C., Grazian A., Grupp F., Guzzo L., Haugan S. V. H., Holmes W., Hook I. M., Hormuth F., Hornstrup A., Jahnke K., Jhabvala M., Joachimi B., Keihänen E., Kermiche S., Kiessling A., Kubik B., Kunz M., Kurki-Suonio H., Laureijs R., Le Brun A. M. C., Ligori S., Lilje P. B., Lindholm V., Lloro I., Mainetti G., Maino D., Maiorano E., Mansutti O., Marggraf O., Martinelli M., Martinet N., Marulli F., Massey R. J., Medinaceli E., Mei S., Mellier Y., Meneghetti M., Merlin E., Meylan G., Mora A., Moresco M., Moscardini L., Nakajima R., Neissner C., Niemi S.-M., Padilla C., Paltani S., Pasian F., Pedersen K., Pettorino V., Pires S., Polenta G., Poncet M., Popa L. A., Pozzetti L., Raison F., Rebolo R., Renzi A., Rhodes J., Riccio G., Roncarelli M., Saglia R., Sakr Z., Sapone D., Sartoris B., Schneider P., Schrabback T., Secroun A., Seidel G., Serrano S., Simon P., Sirignano C., Sirri G., Stanco L., Starck J.-L., Steinwagner J., Tallada-Crespí P., Taylor A. N., Teplitz H. I., Tereno I., Tessore N., Toft S., Toledo-Moreo R., Torradeflot F., Tutusaus I., Valenziano L., Valiviita J., Vassallo T., Verdoes Kleijn G., Veropalumbo A., Wang Y., Weller J., Zamorani G., Zinchenko I. A., Zucca E., Ballardini M., Bolzonella M., Bozzo E., Burigana C., Cabanac R., Cappi A., Di Ferdinando D., Escartin Vigo J. A., Gabarra L., Huertas-Company M., Martín-Fleitas J., Matthew S., Mauri N., Metcalf R. B., Pezzotta A., Pöntinen M., Porciani C., Risso I., Scottez V., Sereno M., Tenti M., Viel M., Wiesmann M., Akrami Y., Andika I. T., Anselmi S., Archidiacono M., Atrio-Barandela F., Bertacca D., Bethermin M., Blanchard A., Blot L., Bonici M., Borgani S., Brown M. L., Bruton S., Calabro A., Camacho Quevedo B., Caro F., Carvalho C. S., Castro T., Cogato F., Conseil S., Cooray A. R., Cucciati O., Davini S., Desprez G., Díaz-Sánchez A., Diaz J. J., Di Domizio S., Diego J. M., Elkhashab M. Y., Enia A., Fang Y., Ferrari A. G., Finoguenov A., Ganga K., García-Bellido J., Gasparetto T., Gautard V., Gaztanaga E., Giacomini F., Gianotti F., Gozaliasl G., Guidi M., Gutierrez C. M., Hall A., Hildebrandt H., Hjorth J., Kajava J. J. E., Kang Y., Kansal V., Karagiannis D., Kiiveri K., Kim J., Kirkpatrick C. C., Kruk S., Le Graet J., Legrand L., Lembo M., Lepori F., Leroy G., Lesci G. F., Lesgourgues J., Leuzzi L., Liaudat T. I., Loureiro A., Macias-Perez J., Maggio G., Magliocchetti M., Mannucci F., Maoli R., Martins C. J. A. P., Maurin L., Miluzio M., Monaco P., Moretti C., Morgante G., Naidoo K., Navarro-Alsina A., Nesseris S., Paoletti D., Passalacqua F., Paterson K., Patrizii L., Pisani A., Potter D., Quai S., Radovich M., Rodighiero G., Sacquegna S., Sahlén M., Sanders D. B., Sarpa E., Schneider A., Sciotti D., Sellentin E., Smith L. C., Sorce J. G., Tanidis K., Tao C., Testera G., Teyssier R., Tosi S., Troja A., Tucci M., Valieri C., Vergani D., Verza G., Vielzeuf P., Walton N. A.   +314 more
doaj   +1 more source

Detached Tidal Dwarf Galaxies [PDF]

, 2019
Dwarf galaxies may form in the tidal tails of galaxy interactions. If these tidal dwarf galaxies (TDGs) detach from their parent galaxies, then an independent dwarf galaxy emerges. However, the lifespan of such objects is uncertain.
Jones, Mark, Smith, Beverly J, Giroux, Mark   +2 more
core  

Small-scale cosmology with dwarf galaxies [PDF]

, 2018
The universe has spawned millions of galaxies – from the largest elliptical galaxies containing billions of stars, to the smallest dwarf galaxies with only a few thousands of stars, just bright enough to not drown in the sea of atmospheric light.
Müller, Oliver
core   +1 more source

Star Formation Histories of Dwarf Galaxies in the Local Group [PDF]

, 2001
International audienceA considerable fraction of dwarf galaxies may represent fossils of the very first star formation in the universe. If true, in much the same way as paleontologists reconstruct the prehistoric life from the fossils, it is possible to ...
Ikuta, C., Arimoto, Nobuo, Jablonka, Pascale   +2 more
core  

Keck/KCWI Spectroscopy of Globular Clusters in Local Volume Dwarf Galaxies [PDF]

A number of nearby dwarf galaxies have globular cluster (GC) candidates that require spectroscopic confirmation. Here we present Keck telescope spectra for 15 known GCs and GC candidates that may be associated with a host dwarf galaxy, and an additional ...
Forbes, Duncan A., Gannon, Jonah, Brodie, Jean P., Lyon, Daniel, Romanowsky, Aaron J.   +4 more
core   +2 more sources

CROCODILE-DWARF: Assembly and Kinematics of Field Dwarf Galaxies with GADGET4-OSAKA

The Astrophysical Journal
We present results from CROCODILE-DWARF, a new suite of cosmological zoom-in hydrodynamic simulations of isolated field dwarf galaxies with halo masses of ∼10 ^10 M _⊙ at z = 0, performed with the gadget 4 -osaka code.
Kazuki Tomaru, Yuri Oku, Daisuke Toyouchi, Kentaro Nagamine   +3 more
doaj   +1 more source

Mass growth of massive quiescent galaxies in the Illustris TNG simulation

Acta Polytechnica
Interactions between galaxies could potentially lead to increased rates of star formation within these galaxies, potentially leading to the occurrence of multiple core-collapse supernovae and the ejection of hot gas.
Bendegúz Koncz, András Péter Joó
doaj   +1 more source

Dark-matter-free Dwarf Galaxy Formation at the Tips of the Tentacles of Jellyfish Galaxies

The Astrophysical Journal
When falling into a galaxy cluster, galaxies experience a loss of gas due to ram pressure stripping. In particular, disk galaxies lose gas from their disks, and very large tentacles of gas can be formed.
V. Lora, R. Smith, J. Fritz, A. Pasquali, A. C. Raga   +4 more
doaj   +1 more source

The Star Formation History in Local Group Galaxies. I. Ten Dwarf Galaxies

The Astrophysical Journal
The star formation histories (SFHs) of galaxies provide valuable insights into galaxy evolution and stellar physics. Understanding the SFHs enables the study of chemical enrichment of galaxies, star formation triggered by interactions, and the behavior ...
Yi Ren, Biwei Jiang, Yuxi Wang, Ming Yang, Zhiqiang Yan   +4 more
doaj   +1 more source