Results 41 to 50 of about 1,250,237 (300)

The JWST Emission Line Survey (JELS): an untargeted search for H α emission line galaxies at z > 6 and their physical properties

Monthly Notices of the Royal Astronomical Society
ABSTRACT We present the first results of the JWST Emission Line Survey (JELS). Utilizing the first NIRCam narrow-band imaging at 4.7 $\mu$m, over 63 arcmin$^{2}$ in the PRIMER/COSMOS field, we have identified 609 emission line galaxy candidates. From these, we robustly selected 35 H $\, \alpha$ star-forming galaxies at $z \sim 6.1$, with
Pirie, CA, Best, PN, Duncan, KJ, McLeod, DJ, Cochrane, RK, Clausen, M, Dunlop, JS, Flury, SR, Geach, JE, Hale, CL, Ibar, E, Kondapally, R, Li, Z, Matthee, J, McLure, RJ, Ossa-Fuentes, L, Patrick, AL, Smail, I, Sobral, D, Stephenson, HMO, Stott, JP, Swinbank, AM   +21 more
openaire   +3 more sources

Distribution of the He I 5876 A/H-beta line emission ratio in the Crab Nebula

The Astronomical Journal, 1987
Interference-filter images of the Crab Nebula have been employed to produce a map of the He I 5876 A/H-beta line-intensity ratio over the bright filamentary structure. Calibrations with published slit spectroscopy and theoretical calculations indicate that most of the nebular gas is characterized by at least a 75 percent helium mass fraction if the ...
Alan Uomoto, Gordon M. MacAlpine
openaire   +1 more source

Why and When Are Evidence‐Based Interventions Adopted in Paediatric Supportive Care? A Qualitative Exploration of the Determinants of Photobiomodulation Implementation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie, Kara A. Gray‐Burrows, Peter F. Day, Bob Phillips, Carl A. Thompson   +4 more
wiley   +1 more source

Limits on the 21 cm Power Spectrum at z = 6.5–7.0 from Murchison Widefield Array Observations

The Astrophysical Journal
This paper presents the spherically averaged 21 cm power spectrum derived from Epoch of Reionization (EoR) observations conducted with the Murchison Widefield Array (MWA). The analysis uses EoR0-field data, centered at (R.A. = 0 h , decl.
C. D. Nunhokee, D. Null, C. M Trott, N. Barry, Y. Qin, R. B. Wayth, J. L. B. Line, C. H. Jordan, B. Pindor, J. H. Cook, J. Bowman, A. Chokshi, J. Ducharme, K. Elder, Q. Guo, B. Hazelton, W. Hidayat, T. Ito, D. Jacobs, E. Jong, M. Kolopanis, T. Kunicki, E. Lilleskov, M. F. Morales, J. C. Pober, A. Selvaraj, R. Shi, K. Takahashi, S. J. Tingay, R. L. Webster, S. Yoshiura, Q. Zheng   +31 more
doaj   +1 more source

Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment

The Astrophysical Journal, 2023
We present a detection of 21 cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment.
The CHIME Collaboration, Mandana Amiri, Kevin Bandura, Tianyue Chen, Meiling Deng, Matt Dobbs, Mateus Fandino, Simon Foreman, Mark Halpern, Alex S. Hill, Gary Hinshaw, Carolin Höfer, Joseph Kania, T. L. Landecker, Joshua MacEachern, Kiyoshi Masui, Juan Mena-Parra, Nikola Milutinovic, Arash Mirhosseini, Laura Newburgh, Anna Ordog, Ue-Li Pen, Tristan Pinsonneault-Marotte, Ava Polzin, Alex Reda, Andre Renard, J. Richard Shaw, Seth R. Siegel, Saurabh Singh, Keith Vanderlinde, Haochen Wang, Donald V. Wiebe, Dallas Wulf   +32 more
doaj   +1 more source

A New H I Survey of Active Galaxies

, 2008
We have conducted a new Arecibo survey for H I emission for 113 galaxies with broad-line (type 1) active galactic nuclei (AGNs) out to recession velocities as high as 35,000 km/s. The primary aim of the study is to obtain sensitive H I spectra for a well-
Allen R. J., Bottinelli L., Broeils A. H., Casertano S. P. R., Ho L. C., Jenkins C. R., Jenny E. Greene, Jeremy Darling, Luis C. Ho, Netzer H., Schulz H., Stirpe G. M., Tully R. B., Winkler H.   +13 more
core   +1 more source

Emission Line Flickering from the Secondary Star in Cataclysmic Variables? A study of V3885 Sagitarii [PDF]

, 2007
Spectrophotometric observations of H-alpha and He I 6678 emission lines of the nova-like Cataclysmic Variable V3885 Sgr are presented and analyzed. The binary orbital period was determined as P = 0.20716071(22) days. Doppler Tomography was performed with
Bruch A., Bruch A., Fabíola M. A. Ribeiro, Geetsema G. T., Haug K., Horne K., Horne K., Marcos P. Diaz, Marsh T. R., Mennickent R. E., Mikolajewski M., Strittmatter P. A., Vogt N., Warner B., Wegner G., Wood J.   +15 more
core   +2 more sources

Constraining the Clustering and 21 cm Signature of Radio Galaxies at Cosmic Dawn

The Astrophysical Journal Letters
The efficiency of radio emission is an important unknown parameter of early galaxies at cosmic dawn, as models with high efficiency have been shown to modify the cosmological 21 cm signal substantially, deepening the absorption trough and boosting the 21
Sudipta Sikder, Rennan Barkana, Anastasia Fialkov   +2 more
doaj   +1 more source

Investigating the Near-Infrared Properties of Planetary Nebula II. Medium Resolution Spectra

, 1999
We present medium-resolution (R~700) near-infrared (lambda = 1 - 2.5 micron) spectra of a sample of planetary nebulae (PNe). A narrow slit was used which sampled discrete locations within the nebulae; observations were obtained at one or more positions ...
Aaquist O. B., Aspin C., Bachiller R., Bakker E. J., Balm S. P., Bohigas J., Bujarrabal V., Carsenty U., Cernicharo J., Corradi R. L. M., Cuesta L., Dayal A., Feibelman W. A., Garcia-Lario P., Geballe T. R., Greaves J. S., Harrington J. P., Hora J. L., Hua C. T., Hyung S., Joseph L. Hora, Kahane C., Latter W. B., Likkel L., Likkel L., Lo K. Y., Loup C., Lynne K. Deutsch, Martin-Pintado J., Meaburn J., Mellema G., Natta A., O'Dell C. R., Oudmaijer R. D., Oudmaijer R. D., Ramsay S. K., Reay N. K., Rola C., Schwarz H. E., Scrimger M. J., Shupe D. L., Walsh J. R., Whitelock P. A., Wiese W. L., William B. Latter, Willner S. P.   +45 more
core   +2 more sources

Characterizing the Rigidly Rotating Magnetosphere Stars HD 345439 and HD 23478 [PDF]

, 2015
The SDSS III APOGEE survey recently identified two new $\sigma$ Ori E type candidates, HD 345439 and HD 23478, which are a rare subset of rapidly rotating massive stars whose large (kGauss) magnetic fields confine circumstellar material around these ...
Bartz, J., Chojnowski, S. D., Davenport, J. R. A., Eikenberry, S. S., Lomax, J. R., Majewski, S. R., Pepper, J., Richardson, N. D., Skrutskie, M., Whelan, D. G., Wisniewski, J. P.   +10 more
core   +3 more sources