Results 81 to 90 of about 445,447 (209)

The evolution of dwarf galaxies

, 1988
We propose an evolutionary model for dwarf galaxies in Which initially metal-poor gas-rich dwarf irregular (dI) galaxies evolve through bursting Blue Compact Dwarf(BCD) stages and eventually fade from the BCD phase to become dwarf ellipticals (dE ...
Davies, Jonathan Ivor, Phillipps, S.
core   +1 more source

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived from Hi observations for a sample of 62 galaxies that have been observed as part of the Westerbork Hi Survey of Spiral and Irregular Galaxies (WHISP) project.
J. M. van der Hulst, Sancisi, R., van Albada, T. S., van der Hulst, J. M., R. A. Swaters, van der Hulst, J. M.; id_orcid, R. Sancisi, Swaters, R. A., T. S. van Albada   +8 more
core   +1 more source

Empirical dependencies for irregular dwarf galaxies

Astronomical and Astrophysical Transactions
In this work, we search for empirical relationships for irregular dwarf galaxies using a collection of observational data published in the NASA and HyperLeda databases. Using a complex statistical analysis, we calculated correlation coefficients between various physical parameters of irregular dwarf galaxies.
Tillaboev, K., Tadjibaev, I., Otojanova, N.   +2 more
openaire   +2 more sources

Nebular spectroscopy of dwarf irregular galaxies in nearby groups

, 2005
A number of dwarf irregular galaxies have been selected in the three most nearby groups of galaxies: the M81, Centaurus A, and Sculptor groups. The final objective is to establish whether there is a relationship between the luminosity and the ...
Riegerbauer, Regina
core  

A Study of Two Dwarf Irregular Galaxies with AsymmetricalStar Formation Distributions [PDF]

, 2018
Two dwarf irregular galaxies, DDO 187 and NGC 3738, exhibit a striking pattern of star formation: intense star formation is taking place in a large region occupying roughly half of the inner part of the optical galaxy. We use data on the H i distribution
Dale, Daniel A., Oh, Se-Heon, Hunter, Deidre A., Hwihyun Kim, Leonardo Ubeda, Adamo, Angela,, Grebel, Eva K., Messa, Matteo, Kim, Hwihyun, Gallagher, John S., R. C. Kennicutt, Grasha, K., Matteo Messa, Janice C. Lee, Zhang, Hong-Xin, Michele Fumagalli, Zhang, H., Bright, S., Lee, Janice C., Angela Adamo, Kahre, L., David O. Cook, Gouliermis, Dimitrios A., Daniel A. Dale, Ryon, Jenna E., Grasha, Kathryn, Cignoni, Michele, Oh, S., Fumagalli, M., Elena Sabbi, Ubeda, Leonardo, Lauren Kahre, Kim, H., Grebel, E., Messa, M., Kennicutt, R.C., Sabbi, E., Monica Tosi, Gallagher, John S., III, Hunter, D., Kennicutt, R. C., Se-Heon Oh, Dale, D., Fumagalli, Michele, Gallardo, S., Adamo, Angela, Lee, J., Dimitrios A. Gouliermis, Jenna E. Ryon, Elmegreen, B., Calzetti, Daniela, Gallardo, Samavarti, Bruce G. Elmegreen, Ryon, J., Elmegreen, Bruce G., Elena Sacchi, Kathryn Grasha, Adamo, A., Cook, D., Cook, David O., Sacchi, E., Gallagher III, J., Kennicutt, R., Stacey N. Bright, Bright, Stacey N., Tosi, M., Michele Cignoni, Eva K. Grebel, John S. Gallagher, Samavarti Gallardo, Tosi, Monica, Daniela Calzetti, Sabbi, Elena, Calzetti, D., Sacchi, Elena, Ubeda, L., Deidre A. Hunter, Cignoni, M., Kahre, Lauren, Hong-Xin Zhang, Messa, Matteo,, Gouliermis, D.   +81 more
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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

Dwarf Irregular Galaxies and the Intergalactic Medium

, 1998
To be published in the proceedings of the XVI Cracow Summer School of Cosmology, 9 pages, no figures %in the University of Lodz ...
openaire   +2 more sources

Oxygen and Nitrogen in Isolated Dwarf Irregular Galaxies

The Astrophysical Journal, 2006
We present long slit optical spectroscopy of 67 HII regions in 21 dwarf irregular galaxies to investigate the enrichment of oxygen, nitrogen, neon, sulfur, and argon in low mass galaxies. Oxygen abundances are obtained via direct detection of the temperature sensitive emission lines for 25 HII regions; for the remainder of the sample, oxygen abundances
van Zee, L., Haynes, M. P.
openaire   +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

Oxygen Abundance Throughout the Dwarf Starburst Galaxy IC 10

The Astronomical Journal
Measurements of oxygen abundance throughout galaxies provide insight to the formation histories and ongoing processes. Here we present a study of the gas-phase oxygen abundance in the H ii regions and diffuse gas of the nearby starburst dwarf galaxy, IC ...
Maren Cosens, Shelley A. Wright, Karin Sandstrom, Lee Armus, Norman Murray, Jordan N. Runco, Sanchit Sabhlok, James Wiley   +7 more
doaj   +1 more source