Results 111 to 120 of about 12,455 (258)

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

The K luminosity-metallicity relation for dwarf galaxies and the tidal dwarf galaxies in the tails of HCG 31

, 2006
We determine a K-band luminosity-metallicity (K-Z) relation for dwarf irregular galaxies, over a large range of magnitudes, -20.5 < M_K < -13.5, using a combination of K photometry from either the 2-micron all sky survey (2MASS) or the recent study of ...
Athanassoula E., Barnes J., Chantal Balkowski, Claudia L. Mendes de Oliveira, Duc P.-A., Edmunds M. G., Eduardo S. Cypriano, Henri Plana, Hidalgo-Gamez A. M., Laerte Sodré, Jr., Masegosa J., Philippe Amram, Sonia Temporin, Vigroux L.   +13 more
core   +2 more sources

The JWST Resolved Stellar Populations Early Release Science Program. VIII. The Spatially Resolved Star Formation History of WLM

The Astrophysical Journal
Radial stellar population gradients within dwarf galaxies provide a promising avenue for disentangling the drivers of galaxy evolution, including environment. Within the Local Volume, radial stellar age gradient slopes correlate with interaction history,
Roger E. Cohen, Kristen B. W. McQuinn, Alessandro Savino, Max J. B. Newman, Daniel R. Weisz, Andrew E. Dolphin, Martha L. Boyer, Matteo Correnti, Marla C. Geha, Mario Gennaro, Karoline M. Gilbert, Nitya Kallivayalil, Jack T. Warfield, Benjamin F. Williams, Alyson M. Brooks, Andrew A. Cole, Evan D. Skillman, Christopher T. Garling, Jason S. Kalirai, Jay Anderson   +19 more
doaj   +1 more source

VLT Spectroscopy of Globular Clusters in Low Surface Brightness Dwarf Galaxies

, 2007
We present VLT/FORS2 spectroscopic observations of globular clusters (GCs) in five low surface brightness (LSB) dwarf galaxies: KK211 and KK221, which are both dwarf spheroidal satellites (dSph) of NGC 5128, dSph KK84 located close to the isolated S0 ...
Arimoto N., Clemens M. S., Di Criscienzo M., Karachentsev I. D., Karachentseva V. E., Kauffmann G., Margarita E. Sharina, Matteucci F., Nayakshin S., Richtler T., Thomas H. Puzia, West M. J.   +11 more
core   +1 more source

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

The Local Ultraviolet to Infrared Treasury. I. Survey Overview of the Broadband Imaging

The Astrophysical Journal Supplement Series
The Local Ultraviolet to Infrared Treasury (LUVIT) is a Hubble Space Telescope program that combines newly acquired data in the near-ultraviolet (NUV), optical, and near-infrared (NIR) with archival optical and NIR imaging to produce multiband ...
Karoline M. Gilbert, Yumi Choi, Martha L. Boyer, Benjamin F. Williams, Daniel R. Weisz, Eric F. Bell, Julianne J. Dalcanton, Kristen B. W. McQuinn, Evan D. Skillman, Guglielmo Costa, Andrew E. Dolphin, Morgan Fouesneau, Léo Girardi, Steven R. Goldman, Karl D. Gordon, Puragra Guhathakurta, Maude Gull, Lea Hagen, Ky Huynh, Christina W. Lindberg, Paola Marigo, Claire E. Murray, Giada Pastorelli, Petia Yanchulova Merica-Jones   +23 more
doaj   +1 more source

Star Formation Histories of the LEGUS Dwarf Galaxies. II. Spatially Resolved Star Formation History of the Magellanic Irregular NGC 4449^∗ [PDF]

, 2018
E. Sacchi, M. Cignoni, A. Aloisi, M. Tosi, D. Calzetti, J. C. Lee, A. Adamo, F. Annibali, D. A. Dale, B. G. Elmegreen, D. A. Gouliermis, K. Grasha, E. K. Grebel, D. A. Hunter, E. Sabbi, L. J. Smith, D. A. Thilker, L. Ubeda, B. C. Whitmore   +18 more
openalex   +1 more source

Discovery of Metal-poor and Distant Pre–Main Sequence Candidates in WLM with JWST

The Astrophysical Journal Letters
We present the discovery of 12 metal-poor and ​​​distant pre–main sequence (PMS) candidates in the dwarf irregular galaxy Wolf–Lundmark–Melotte ∼968 kpc away, at a present-day metallicity of [Fe/H] ∼ –0.9.
Venu M. Kalari, Ricardo Salinas, Morten Andersen, Guido De Marchi, Monica Rubio, Jorick S. Vink, Hans Zinnecker   +6 more
doaj   +1 more source

The Local Ultraviolet to Infrared Treasury. II. Refining Star Formation Histories of 10 Metal-poor Dwarf Galaxies with Simultaneous UV-optical Two-CMD Fitting

The Astronomical Journal
We present the star formation histories (SFHs) of 10 metal-poor (≲12% Z _⊙ ), star-forming dwarf galaxies from the Local Ultraviolet to Infrared Treasury survey.
Yumi Choi, Karoline M. Gilbert, Benjamin F. Williams, Daniel R. Weisz, Evan D. Skillman, Julianne J. Dalcanton, Kristen B. W. McQuinn, Andrew E. Dolphin, Giada Pastorelli, Martha L. Boyer, Karl D. Gordon, Léo Girardi, Maude Gull   +12 more
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source