Zobrazeno 1 - 10
of 2 806
pro vyhledávání: '"Watkins, A E"'
The ionization of diffuse gas located far above the energetic midplane OB stars poses a challenge to the commonly accepted notion that radiation from OB stars is the primary ionization source for gas in galaxies. We investigated the sources of ionizi
Externí odkaz:
http://arxiv.org/abs/2409.16062
Autor:
Lazar, Ilin, Kaviraj, Sugata, Watkins, Aaron E., Martin, Garreth, Bichang'a, Brian, Jackson, Ryan A.
We use a complete sample of 211 nearby (z<0.08) dwarf (10^8 MSun < Mstar < 10^9.5 Msun) galaxies in low-density environments, to study their structural properties: effective radii (R_e), effective surface brightnesses (mu_e) and colour gradients. We
Externí odkaz:
http://arxiv.org/abs/2409.02169
Autor:
Guzelturk, Burak, Portner, Joshua, Ondry, Justin, Ghanbarzadeh, Samira, Tarantola, Mia, Jeong, Ahhyun, Field, Thomas, Chandler, Alicia M., Wieman, Eliza, Hopper, Thomas R., Watkins, Nicolas E., Yue, Jin, Cheng, Xinxin, Lin, Ming-Fu, Luo, Duan, Kramer, Patrick L., Shen, Xiaozhe, Reid, Alexander H., Borkiewicz, Olaf, Ruett, Uta, Zhang, Xiaoyi, Lindenberg, Aaron M., Ma, Jihong, Schaller, Richard, Talapin, Dmitri V., Cotts, Benjamin L.
Symmetry control is essential for realizing unconventional properties, such as ferroelectricity, nonlinear optical responses, and complex topological order, thus it holds promise for the design of emerging quantum and photonic systems. Nevertheless,
Externí odkaz:
http://arxiv.org/abs/2408.15464
Autor:
Bichang'a, B., Kaviraj, S., Lazar, I., Jackson, R. A., Das, S., Smith, D. J. B., Watkins, A. E., Martin, G.
Given their dominance of the galaxy number density, dwarf galaxies are central to our understanding of galaxy formation. While the incidence of AGN and their impact on galaxy evolution has been extensively studied in massive galaxies, much less is kn
Externí odkaz:
http://arxiv.org/abs/2406.11962
We examine the connection between diffuse ionised gas (DIG), HII regions, and field O and B stars in the nearby spiral M101 and its dwarf companion NGC 5474 using ultra-deep H$\alpha$ narrow-band imaging and archival GALEX UV imaging. We find a stron
Externí odkaz:
http://arxiv.org/abs/2404.19003
Autor:
Lazar, Ilin, Kaviraj, Sugata, Watkins, Aaron E., Martin, Garreth, Bichang'a, Brian, Jackson, Ryan A.
We use a complete, unbiased sample of 257 dwarf (10^8 MSun < Mstar < 10^9.5 MSun) galaxies at z < 0.08, in the COSMOS field, to study the morphological mix of the dwarf population in low-density environments. Visual inspection of extremely deep optic
Externí odkaz:
http://arxiv.org/abs/2402.12440
Autor:
Watkins, A. E., Kaviraj, S., Collins, C. C., Knapen, J. H., Kelvin, L. S., Duc, P. -A., Román, J., Mihos, J. C.
The low surface brightness (LSB) regime ($\mu_{g} \gtrsim 26$ mag arcsec$^{-2}$) comprises a vast, mostly unexplored discovery space, from dwarf galaxies to the diffuse interstellar medium. Accessing this regime requires precisely removing instrument
Externí odkaz:
http://arxiv.org/abs/2401.12297
Autor:
Mihos, J. Christopher, Durrell, Patrick R., Watkins, Aaron E., McGaugh, Stacy S., Feldmeier, John J.
We use deep Hubble Space Telescope imaging to study the resolved stellar populations in BST1047+1156, a gas-rich, ultradiffuse dwarf galaxy found in the intragroup environment of the Leo I galaxy group. While our imaging reaches approximately two mag
Externí odkaz:
http://arxiv.org/abs/2401.03985
Publikováno v:
A&A 681, A76 (2024)
The universality or non-universality of the initial mass function (IMF) has significant implications for determining star formation rates and star formation histories from photometric properties of stellar populations. We reexamine whether the IMF is
Externí odkaz:
http://arxiv.org/abs/2311.03237
Autor:
Montes, Mireia, Annibali, Francesca, Bellazzini, Michele, Borlaff, Alejandro S., Brough, Sarah, Buitrago, Fernando, Chamba, Nushkia, Collins, Chris, Dell'Antonio, Ian, Escala, Ivanna, Gonzalez, Anthony H., Holwerda, Benne, Kaviraj, Sugata, Knapen, Johan, Koekemoer, Anton, Laine, Seppo, Marcum, Pamela, Martin, Garreth, Martinez-Delgado, David, Mihos, Chris, Ricotti, Massimo, Trujillo, Ignacio, Watkins, Aaron E.
One of the last remaining frontiers in optical/near-infrared observational astronomy is the low surface brightness regime (LSB, V-band surface brightness, $\mu_V>$ 27 AB mag/arcsec$^2$). These are the structures at very low stellar surface densities,
Externí odkaz:
http://arxiv.org/abs/2306.09414