Results 101 to 110 of about 262,930 (273)

Constraints on the presence of water megamaser emission in z~2.5 ultraluminous infrared starburst galaxies

, 2009
We present Expanded Very Large Array and Arecibo observations of two lensed submm galaxies at z~2.5, in order to search for redshifted 22.235 GHz water megamaser emission.
Barger, Barvainis, Bertoldi, Carilli, Chapman, Daddi, Daddi, Darling, Downes, Downes, Edmonds, Emmanuel Momjian, Frayer, Gao, Genzel, Hagiwara, Henkel, Jeff Wagg, Menéndez-Delmestre, Motohara, Nakai, Pope, Riechers, Rigby, Sheth, Smail, Smail, Spergel, Vanden Bout, Wagg, Wagg, Wang, Wilner   +32 more
core   +1 more source

THE 3D-HST SURVEY: HUBBLE SPACE TELESCOPE WFC3/G141 GRISM SPECTRA, REDSHIFTS, AND EMISSION LINE MEASUREMENTS FOR ∼100,000 GALAXIES [PDF]

, 2015
We present reduced data and data products from the 3D-HST survey, a 248-orbit HST Treasury program. The survey obtained WFC3 G141 grism spectroscopy in four of the five CANDELS fields: AEGIS, COSMOS, GOODS-S, and UDS, along with WFC3 H140 imaging ...
I. Momcheva, G. Brammer, P. V. van Dokkum, R. Skelton, K. Whitaker, E. Nelson, M. Fumagalli, M. Maseda, J. Leja, M. Franx, H. Rix, R. Bezanson, E. D. Cunha, C. Dickey, N. F. Schreiber, G. Illingworth, M. Kriek, I. Labb'e, J. Lange, B. Lundgren, D. Magee, D. Marchesini, P. Oesch, C. Pacifici, S. Patel, S. Price, T. Tal, D. Wake, A. van der Wel, S. Wuyts   +29 more
semanticscholar   +1 more source

The fall of the Haag (LL4‐6) chondrite breccia—Just 8 years after the nearby fall Stubenberg (LL6)

Meteoritics &Planetary Science, EarlyView.
Abstract On October 24, 2024, an impressive fireball was visible over Austria. After the possible strewn field was calculated, the first sample of the Haag meteorite, with a mass of 8.76 g, was discovered on November 2, 2024, 8 days after the fireball event. Four more samples were found afterward putting the total sample mass at about 151 g.
Addi Bischoff, Markus Patzek, Jean‐Alix Barrat, Stig Bartel, Jasper Berndt, Henner Busemann, Tommaso Di Rocco, Mattias Ek, Manuela A. Fehr, Dieter Heinlein, Daniela Krietsch, Björn Lehnert, Colin Maden, Oscar Marchhart, Martin Martschini, Silke Merchel, Andreas Pack, Andrea Patzer, Marie Pichotta, Maximilian P. Reitze, Philippe Schmitt‐Kopplin, Maria Schönbächler, Leon Thannheiser, Iris Weber, Alexander Wieser, Karl Wimmer   +25 more
wiley   +1 more source

Mid-infrared Ensemble Variability of Broad-line and Narrow-line Seyfert 1 Galaxies

The Astrophysical Journal
We utilized multiepoch archival data from the Wide-field Infrared Survey Explorer to compare the variability at 3.4 μ m (W1 band) and 4.6 μ m (W2 band) of broad-line Seyfert 1 (BLSy1) galaxies and narrow-line Seyfert 1 (NLSy1) galaxies by employing the ...
Zhipeng Hu, Lisheng Mao
doaj   +1 more source

An investigation of the luminosity-metallicity relation for a large sample of low-metallicity emission-line galaxies

, 2009
(abridged) We present 8.2m VLT spectroscopic observations of 28 HII regions in 16 emission-line galaxies and 3.6m ESO telescope spectroscopic observations of 38 HII regions in 28 emission-line galaxies.
Abazajian, Contini, Ellison, Gil de Paz, Guseva, H. T. Meyer, Hoyos, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, K. J. Fricke, Kakazu, Kennicutt, Kewley, Kewley, Kobulnicky, Kobulnicky, Kobulnicky, Kobulnicky, Kunth, Lamareille, Lee, Lee, Lequeux, Liang, Lilly, Maier, Melbourne, N. G. Guseva, Noeske, P. Papaderos, Papaderos, Papaderos, Papaderos, Papaderos, Pettini, Pilyugin, Pilyugin, Pilyugin, Richer, Salzer, Salzer, Saviane, Shi, Smith, Stasinska, Stasinska, Thuan, Tremonti, Vaduvescu, Vanzi, Vila-Costas, Villar-Martín, Whitford, Y. I. Izotov, Zackrisson   +59 more
core   +1 more source

Evidence for Supermassive Black Holes in Active Galactic Nuclei from Emission-Line Reverberation [PDF]

, 2000
Emission-line variability data for Seyfert 1 galaxies provide strong evidence for the existence of supermassive black holes in the nuclei of these galaxies, and that the line-emitting gas is moving in the gravitational potential of that black hole.
Amri Wandel, Bradley M. Peterson, Collin-Souffrin S., Kormendy J., Richstone D.   +4 more
core   +2 more sources

Accuracy and precision of a sphero‐cylindrical over‐refraction app for smartphones

Ophthalmic and Physiological Optics, EarlyView.
Abstract Purpose To evaluate the accuracy and precision of a web‐based smartphone app designed to measure sphero‐cylindrical over‐refraction. Methods A total of 307 healthy young subjects (22.5 ± 3.4 years) underwent clinical subjective refraction. In addition to each subject's refractive correction, spherical and cylindrical errors from −1.50 to 0.00 ...
Rosa Maria Salmeron‐Campillo, Gines Martinez‐Ros, Jose Angel Diaz‐Guirado, Carmen Travel‐Alarcon, Mateusz Jaskulski, Norberto Lopez‐Gil   +5 more
wiley   +1 more source

The nature of LINER galaxies: Ubiquitous hot old stars and rare accreting black holes [PDF]

, 2013
Galaxies, which often contain ionised gas, sometimes also exhibit a so-called low-ionisation nuclear emission line region (LINER). For 30 years this was attributed to a central mass-accreting supermassive black hole (AGN) of low luminosity, making LINER ...
Alves, J., collaboration, the CALIFA, Falcón-Barroso, J., Fernandes, R. Cid, Galbany, L., García-Benito, R., Husemann, B., Jahnke, K., Kennicutt, R. C., Lyubenova, M., Marino, R. A., Masegosa, J., Mast, D., Márquez, I., Pasquali, A., Singh, R., Sánchez, S. F., van de Ven, G., Walcher, J., Wild, V., Wisotzki, L., Ziegler, B.   +21 more
core   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters

The Astrophysical Journal
JWST has revealed diverse new populations of high-redshift ( z  ∼ 4–11) active galactic nuclei (AGNs) and extreme star-forming galaxies that challenge current photoionization models.
Helena Treiber, Jenny E. Greene, John R. Weaver, Tim B. Miller, Lukas J. Furtak, David J. Setton, Bingjie Wang, Anna de Graaff, Rachel Bezanson, Gabriel Brammer, Sam E. Cutler, Pratika Dayal, Robert Feldmann, Seiji Fujimoto, Andy D. Goulding, Vasily Kokorev, Ivo Labbe, Joel Leja, Danilo Marchesini, Themiya Nanayakkara, Erica Nelson, Richard Pan, Sedona H. Price, Jared Siegel, Katherine A. Suess, Katherine E. Whitaker   +25 more
doaj   +1 more source