Results 91 to 100 of about 445,447 (209)

WLM: Dynamics of an isolated dwarf irregular galaxy under ram pressure in the Local Group

Astronomy & Astrophysics
The Wolf–Lundmark–Melotte (WLM) galaxy is an archetypal dwarf irregular galaxy that has not experienced interactions with major Local Group galaxies within the past 8 Gyr.
Kolhe Neel, Hammer Francois, Yang Yanbin, Namumba Brenda, Chemin Laurent, Amram Philippe, Ianjamasimanana Roger, Carignan Claude   +7 more
doaj   +1 more source

Measuring the star formation rate density from CNOC2 [PDF]

, 2006
This thesis charts the evolution of the Universal Star Formation Rate Density (SFRD) across the redshift range 0.2 < z < 0.6, using the 2nd Canadian Network for Observational Cosmology Survey (CN0C2).
Whitaker, Richard James
core  

Near IR imaging of Centaurus group dwarf elliptical galaxies

, 2016
Detailed studies of dwarf galaxies in the Local Group have revealed an amazing diversity in their star formation histories. Young and intermediate-age stellar populations are observed in some gas-poor dwarf ellipticals, like Fornax and Carina, where ...
Zoccali, M, Da Costa, Gary, Rekjkuba, M, Jerjen, Helmut, Binggeli, Bruno   +4 more
core   +1 more source

Far-infrared Emission Lines as Metallicity Diagnostic

The Astrophysical Journal
The chemical abundance of the interstellar medium is a key tracer of galaxy evolution. Optical and ultraviolet emission lines are widely used to derive gas-phase metallicities, but suffer from uncertainties due to possible temperature fluctuations and ...
Elizabeth Fletcher, Tommy Wiklind, Skarleth Motiño Flores, Rafael T. Eufrasio   +3 more
doaj   +1 more source

Spatial correlation between dust and Hα emission in dwarf irregular galaxies [PDF]

, 2016
Using a sample of dwarf irregular galaxies selected from the ALFALFA blind H i-survey and observed using the VIMOS IFU, we investigate the relationship between Hα emission and Balmer optical depth (${\tau }_{{\rm{b}}}$).
Forrest, B, Forrest, Ben, Accurso, G, Oliva-Altamirano, Paola, Brough, S, Tran, Kim-Vy, Brough, Sarah, Salmon, Brett, Salmon, B, Kim-Vy, T, Accurso, Gioacchino, Saintonge, Amélie, Tran, Kim-Vy ; https://orcid.org/, Tran, KV, Saintonge, A, Oliva-Altamirano, P, Jimmy, Brough, S ; https://orcid.org/   +17 more
core   +1 more source

Massive stars in the Sagittarius Dwarf Irregular Galaxy [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2017
Abstract Low metallicity massive stars hold the key to interpret numerous processes in the past Universe including re–ionization, starburst galaxies, high-redshift supernovae, and γ-ray bursts. The Sagittarius Dwarf Irregular Galaxy [SagDIG, 12+log(O/H) = 7.37] represents an important landmark in the quest for analogues accessible with ...
openaire   +2 more sources

Interstellar medium oxygen abundances of dwarf irregular galaxies in Centaurus A and nearby groups [PDF]

, 2017
We present results of optical spectroscopy of 35 H ii regions from eight dwarf galaxies in the Centaurus A (Cen A) group. [O iii]λ4363 is detected in ESO272−G025 and ESO324−G024, and direct oxygen abundances of 12 + log (O/H) = 7.76 ± 0.09 and 7.94 ± 0 ...
Zucker, D. B., Lee, Henry, Grebel, E. K.
core  

FIGGS: faint irregular galaxies GMRT survey-overview, observations and first results

, 2008
The Faint Irregular Galaxies GMRT Survey (FIGGS) is a Giant Metrewave Radio Telescope (GMRT) based HI imaging survey of a systematically selected sample of extremely faint nearby dwarf irregular galaxies.
Chengalur, Jayaram N., Kaisin, S. S., Karachentsev, I. D., Begum, Ayesha, Sharina, M. E.   +4 more
core   +1 more source

Molecular hydrogen in galaxies [PDF]

, 1987
This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
core  

Euclid: Early Release Observations – The extended stellar component of the IC10 dwarf galaxy★

Astronomy & Astrophysics
We present a detailed analysis of the old, extended stellar component of the Local Group dwarf galaxy IC 10 using deep resolved-star photometry in the VIS and NISP bands of the Euclid Early Release Observations.
Annibali F., Ferguson A. M. N., Sanchez-Alarcon P. M., Dimauro P., Hunt L. K., Pascale R., Bellazzini M., Lançon A., Jablonka P., Howell J. M., Voggel K., Cuillandre J.-C., Abdurro’uf, Battaglia G., BEDIN L. R., Cantiello M., Carollo D., Duc P.-A., Larsen S. S., Libralato M., Marleau F. R., Massari D., Saifollahi T., Tortora C., Urbano M., Gatto M., McDonald I., Baes M., Román J., Dalessandro E., Iodice E., Ragusa R., Pearson S., Andreon S., Auricchio N., Baccigalupi C., Baldi M., Balestra A., 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., Degaudenzi H., De Lucia G., Dole H., Dubath F., Duncan C. A. J., Dupac X., Escoffier S., Farina M., Farinelli R., Ferriol S., Finelli F., Frailis M., Franceschi E., Fumana M., Galeotta S., George K., Gillis B., Giocoli C., Gracia-Carpio J., Grazian A., Grupp F., Haugan S. V. H., Hoekstra H., Holmes W., Hook I. M., Hormuth F., Hornstrup A., Jahnke K., Jhabvala M., Keihänen E., Kermiche S., Kiessling A., Kubik B., Kümmel M., 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., Marcin S., Marggraf O., Martinelli M., Martinet N., Marulli F., Massey R. J., Medinaceli E., Mei S., Melchior M., 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., Percival W. J., Pettorino V., Pires S., Polenta G., Poncet M., Popa L. A., Pozzetti L., Raison F., Rebolo R., Renzi A., Rhodes J., Riccio G., Romelli E., Roncarelli M., Saglia R., Sakr Z., Sapone D., Sartoris B., Schirmer M., Schneider P., Secroun A., Seidel G., Serrano S., Simon P., Sirignano C., Sirri G., Stanco L., Steinwagner J., Tallada-Crespí P., Taylor A. N., Tereno I., Tessore N., Toft S., Toledo-Moreo R., Torradeflot F., Tutusaus I., Valenziano L., Valiviita J., Vassallo T., Veropalumbo A., Wang Y., Weller J., Zamorani G., Zinchenko I. A., Zucca E., García-Bellido J., Martín-Fleitas J., Scottez V.   +177 more
doaj   +1 more source