Results 61 to 70 of about 445,447 (209)

Searching for TeV DM evidence from Dwarf Irregular Galaxies with the HAWC Observatory [PDF]

, 2017
The dynamics of dwarf irregular (dIrr) galaxies are observed to be dominated by dark matter (DM). Recently, the DM density distribution has been studied for 31 dIrrs. Their extended DM halo (Burket type profile) makes these objects good candidates for DM
Ekaterina Karukes, Ernesto Belmont, Karukes E., Alfaro R., Ruben Alfaro, Salucci P., Cadena S. H., Viviana Grammaldi, Leon H., Gammaldi V., Sergio Hernández, Andrés Sandoval, Sandoval A., Belmont E., Hermes Leon Vargas, Paolo Salucci   +15 more
core   +1 more source

Radial variations of the SFHs of dwarf irregular galaxies [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractThe LITTLE THINGS project† has compiled multi-wavelength data (including VLA hi-line emission maps, GALEX FUV/NUV imagery, UBV, narrow-band Hα, and Spitzer images) for a representative sample of nearby dwarf irregular (dIrr) galaxies. The broadband data are used to constrain the radial variations of the star formation (SF) rate (SFR) averaged ...
Hong-Xin Zhang, Deidre A. Hunter, Bruce G. Elmegreen, Yu Gao, Andreas Schruba   +4 more
openaire   +1 more source

Workshop on the Magellanic Clouds and other Dwarf Galaxies [PDF]

, 1998
The Workshop 'The Magellanic Clouds and Other Dwarf Galaxies' was held at the Physikzentrum Bad Honnef in January 1998. The proceedings comprise 79 contributions.
Richtler, T, Braun, J M
core  

Chemistry and Kinematics of the Late-forming Dwarf Irregular Galaxies Leo A, Aquarius, and Sagittarius DIG [PDF]

, 2017
We present Keck/DEIMOS spectroscopy of individual stars in the relatively isolated Local Group dwarf galaxies Leo A, Aquarius, and the Sagittarius dwarf irregular galaxy.
Weisz, Daniel R., Kirby, Evan N., Manning, Ellen M., Cohen, Judith G., Cole, Andrew A., Skillman, Evan D., Rizzi, Luca, HELD, Enrico Valerio   +7 more
core   +1 more source

The Interstellar Medium in I Zw 18 Seen with JWST/MIRI. II. Warm Molecular Hydrogen and Warm Dust

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. Here, we investigate warm molecular hydrogen, H _2 , observed in spectra extracted in ∼120 pc apertures centered on ...
L. K. Hunt, B. T. Draine, M. G. Navarro, A. Aloisi, R. J. Rickards Vaught, 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   +18 more
doaj   +1 more source

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. V. The Star Formation History of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars

The Astrophysical Journal, 2023
We conducted an optical monitoring survey of the Sagittarius dwarf irregular galaxy (SagDIG) during the period of 2016 June–2017 October, using the 2.5 m Isaac Newton Telescopeat La Palama.
Tahere Parto, Shahrzad Dehghani, Atefeh Javadi, Elham Saremi, Jacco Th. van Loon, Habib G. Khosroshahi, Iain McDonald, Mohammad T. Mirtorabi, Mahdieh Navabi, Maryam Saberi   +9 more
doaj   +1 more source

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

Star formation in dwarf irregular galaxies NGC 6822

The Astronomical Journal, 1995
plain Tex format; for hardcopy of figures and tables 2 and 3 contact Tosi@astbo3.bo.astro.it; BAP 09-1994-023 ...
Marconi, G., Tosi, M., Greggio, L., Focardi, P.   +3 more
openaire   +2 more sources

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

Ultradeep Imaging of Nearby Dwarf Irregular Galaxies: Stellar Haloes and Disk Structure

The Astronomical Journal
We have examined the stellar structure of 10 nearby, low stellar mass (10 ^6 –6 × 10 ^7 M _⊙ ) dwarf irregular galaxies by fitting ellipses as a function of surface brightness on ultradeep V images. These are compared to far-ultraviolet images as tracers
Deidre A. Hunter, Bruce G. Elmegreen
doaj   +1 more source