Results 101 to 110 of about 12,455 (258)

Compact Star Clusters in Nearby Dwarf Irregular Galaxies [PDF]

The Astronomical Journal, 2002
Nearby dwarf irregular galaxies were searched for compact star clusters using data from the HST archives.
Billett, Olivia H., Hunter, Deidre A., Elmegreen, Bruce G.   +2 more
openaire   +2 more sources

Pressure and Star Formation in LITTLE THINGS Dwarf Irregular Galaxies

The Astrophysical Journal
The surface densities of star formation, Σ _SFR , in 24 dwarf irregular (dIrr) galaxies from the LITTLE THINGS survey are combined with gas surface densities and midplane pressures to examine the correlations found previously for spiral galaxies.
Bruce G. Elmegreen, Deidre A. Hunter, Edvige Corbelli   +2 more
doaj   +1 more source

The Local Group Census: planetary nebulae in IC 10, Leo A and Sextans A

, 2003
In the framework of our narrow-band survey of the Local Group galaxies, we present the results of the search for planetary nebulae (PNe) in the dwarf irregular galaxies IC10, LeoA and SextansA.
A. A. Zijlstra, A. Mampaso, Arnaboldi, Ciardullo, Ciardullo, Cook, D. J. Lennon, D. L. Pollacco, Danziger, de Vaucouleurs, Dohm-Palmer, Dolphin, Dopita, Durrell, Hodge, Hodge, Huchtmeier, Hunter, J. R. Walsh, Jacoby, Jacoby, Killen, L. Magrini, Leisy, M. Perinotto, Magrini, Massey, Massey, Mathis, Minniti, Morgan, Méndez, N. A. Walton, Oke, P. Leisy, R. Greimel, R. L. M. Corradi, Roberts, Sakai, Sakai, Sandage, Shostak, Skillman, Strobel, Tolstoy, Wilson, Young, Zijlstra   +47 more
core   +1 more source

The metallicity-luminosity relationship of dwarf irregular galaxies [PDF]

Astronomy & Astrophysics, 2003
The nature of a possible correlation between metallicity and luminosity for dwarf irregular galaxies, including those with the highest luminosities, has been explored using simple chemical evolutionary models. Our models depend on a set of free parameters in order to include infall and outflows of gas and covering a broad variety of physical situations.
A. M. Hidalgo-Gámez, F. J. Sánchez-Salcedo, K. Olofsson   +2 more
openaire   +1 more source

The Local Group Census: planetary nebulae in Sextans B

, 2002
Five planetary nebulae (PNe) have been discovered in the nearby dwarf irregular galaxy. Emission line images were obtained using the Wide Field Camera of the 2.5m Isaac Newton Telescope (INT) at La Palma (Spain).
A. A. Zijlstra, Ciardullo, Courteau, D. J. Lennon, D. L. Pollacco, Danziger, Dudziak, Hunter, Hunter, J. R. Walsh, Jacoby, Jacoby, Jacoby, L. Magrini, Lilly, M. Perinotto, Madau, Magrini, Magrini, Mendez, Minniti, Moles, N. A. Walton, Oke, R. Greimel, R. L. M. Corradi, Roye, Sakai, Seaton, Strobel, Tosi, Walsh, Zijlstra, Zijlstra   +33 more
core   +1 more source

Star Formation and Gas Flow History of a Dwarf Irregular Galaxy Traced by Gas-phase and Stellar Abundances [PDF]

, 2020
Nao Fukagawa
openalex   +1 more source

Ultradeep Imaging of Nearby Dwarf Irregular Galaxies: Young Objects in the Far Outer Disk

The Astronomical Journal
Ultradeep UBVI imaging of 10 nearby (≤7.8 Mpc) noninteracting dwarf irregular galaxies are used to examine their far outer stellar disks. The annulus between 26 mag arcsec ^−2 and 29 mag arcsec ^−2 in the V band is what we define as the far outer disk ...
Deidre A. Hunter, Hong-Xin Zhang, Bruce G. Elmegreen, Ella R. Castelloe, Hannah Michaye Ledford, Ishara Nisley, Ryuga Hatano   +6 more
doaj   +1 more source

The evolution of the photometric properties of Local Group dwarf spheroidal galaxies

, 2008
We investigate the present-day photometric properties of the dwarf spheroidal galaxies in the Local Group. From the analysis of their integrated colours, we consider a possible link between dwarf spheroidals and giant ellipticals.
Annibali, Aparicio, Arimoto, Bonifacio, Bonifacio, Bower, Bradamante, Bruzual, Bullock, Calura, Calura, Calura, Calura, Calzetti, Calzetti, Calzetti, Carignan, Carignan, Carrera, Cescutti, Côté, Davies, Dekel, Dolphin, F. Calura, F. Matteucci, Fenner, Ferguson, François, Freedman, G. A. Lanfranchi, Gallagher, Gallagher, Geisler, Geisler, Grebel, Greggio, Hernandez, Hurley-Keller, Ikuta, Irwin, Karick, Kauffmann, Kawata, Koch, Koch, Kroupa, Kuhn, Kunth, Lanfranchi, Lanfranchi, Lanfranchi, Lanfranchi, Lanfranchi, Larson, Lin, Majewski, Mateo, Mateo, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Mayer, Menci, Monaco, Moore, Mori, Muñoz, Nomoto, Papaderos, Phillipps, Recchi, Renzini, Ricotti, Rizzi, Sadakane, Salpeter, Sandage, Saro, Schmidt, Schulte-Ladbeck, Shapley, Shetrone, Shetrone, Skillman, Somerville, Tamura, Thielemann, Thomsen, Tinsley, Tolstoy, Tolstoy, van den Bergh, Van den Hoeck, Venn, Woosley, Zaritsky   +98 more
core   +1 more source

An Arecibo 327 MHz Search for Radio Pulsars and Bursts in the Dwarf Irregular Galaxies Leo A and T [PDF]

, 2021
F. Crawford, Kohei Hayashi
openalex   +2 more sources

A Tale of Three Dwarfs: Cluster-based Star Formation Histories of Blue Compact Dwarf Galaxies

The Astrophysical Journal
We present a new study of the cluster populations in the blue compact dwarf galaxies (BCD) ESO185-IG13, ESO338-IG04, and Haro11, based on new and archival high-resolution images taken by the Hubble Space Telescope, and the first to probe the populations ...
Rupali Chandar, Miranda Caputo, Angus Mok, Sean Linden, Bradley C. Whitmore, Paul Goudfrooij, David O. Cook, Daniela Calzetti, Debra M. Elmegreen, Janice C. Lee, Leonardo Úbeda, Richard White   +11 more
doaj   +1 more source