Results 71 to 80 of about 11,803 (197)

The Interstellar Medium in I Zw 18 Seen with JWST/MIRI. I. Highly Ionized Gas

The Astrophysical Journal
We present JWST/MIRI spectra from the Medium-Resolution Spectrometer of I Zw 18, a nearby dwarf galaxy with a metallicity of ∼3% solar. Its proximity enables a detailed study of highly ionized gas that can be interpreted in the context of newly ...
L. K. Hunt, A. Aloisi, M. G. Navarro, R. J. Rickards Vaught, B. T. Draine, A. Adamo, F. Annibali, D. Calzetti, S. Hernandez, B. L. James, M. Mingozzi, R. Schneider, M. Tosi, B. Brandl, M. G. del Valle-Espinosa, F. Donnan, A. S. Hirschauer, M. Meixner, D. Rigopoulou, C. T. Richardson, J. M. Levanti, A. R. Basu-Zych   +21 more
doaj   +1 more source

HST FUV Spectroscopy of Super Star Cluster A in the Green Pea Analog Mrk 71: Revealing the Presence of Very Massive Stars

The Astrophysical Journal, 2023
Mrk 71 is a low-metallicity ( Z = 0.16 Z _☉ ) starburst region in the local dwarf galaxy NGC 2366, hosting two super star clusters (SSCs A and B), and it is recognized as a Green Pea (GP) analog with SSC A responsible for the GP properties.
Linda J. Smith, M. S. Oey, Svea Hernandez, Jenna Ryon, Claus Leitherer, Stephane Charlot, Gustavo Bruzual, Daniela Calzetti, You-Hua Chu, Matthew J. Hayes, Bethan L. James, Anne E. Jaskot, Göran Östlin   +12 more
doaj   +1 more source

The Local Group dwarf irregular galaxy IC 1613 [PDF]

Astronomy and Astrophysics Supplement Series, 1999
Page 22, Sect. 3.1, you should read Table 1 instead of Table ?? Page 25, Sect. 3.3, you should read Table 3 instead of Table ?? Page 29, Sect. 5.1, you should read Table 3 instead of Table ??
L. Georgiev, J. Borissova, M. Rosado, R. Kurtev, G. Ivanov, G. Koenigsberger   +5 more
openaire   +1 more source

SAGAbg. I. A Near-unity Mass-loading Factor in Low-mass Galaxies via Their Low-redshift Evolution in Stellar Mass, Oxygen Abundance, and Star Formation Rate

The Astrophysical Journal
Measuring the relation between star formation and galactic winds is observationally difficult. In this work we make an indirect measurement of the mass-loading factor (the ratio between the mass outflow rate and star formation rate) in low-mass galaxies ...
Erin Kado-Fong, Marla Geha, Yao-Yuan Mao, Mithi A. C. de los Reyes, Risa H. Wechsler, Yasmeen Asali, Nitya Kallivayalil, Ethan O. Nadler, Erik J. Tollerud, Benjamin Weiner   +9 more
doaj   +1 more source

Pavo: Discovery of a Star-forming Dwarf Galaxy Just Outside the Local Group

The Astrophysical Journal Letters, 2023
We report the discovery of Pavo, a faint ( M _V = −10.0), star-forming, irregular, and extremely isolated dwarf galaxy at D ≈ 2 Mpc. Pavo was identified in Dark Energy Camera Legacy Survey imaging via a novel approach that combines low surface brightness
Michael G. Jones, Burçin Mutlu-Pakdil, David J. Sand, Richard Donnerstein, Denija Crnojević, Paul Bennet, Catherine E. Fielder, Ananthan Karunakaran, Kristine Spekkens, Jay Strader, Ryan Urquhart, Dennis Zaritsky   +11 more
doaj   +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

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 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 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