Results 81 to 90 of about 590 (185)

Deep Optical Images of the Ejecta Nebula around the Wolf–Rayet Star WR 8 (HD 62910)

The Astronomical Journal
We report the results of deep H α and [O iii ] images of the bright WN6/WC4 Wolf–Rayet (WR) star WR 8 (HD 62910). These data show considerably more surrounding nebulosity than seen in prior imaging. The brighter portions of the nebula span $\simeq {6}^{{\
Robert A. Fesen, Daniel Patnaude, Wei-Hao Wang, You-Hua Chu, Jason Sun, Manuel C. Peitsch, Martin Pugh, Scott Garrod, Michael Selby, Alex Woronow   +9 more
doaj   +1 more source

PyEMILI: A New Generation Computer-aided Spectral-line Identifier. II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae

The Astrophysical Journal Supplement Series
In order to test the robustness and reliability of the new generation spectral-line identifier PyEMILI, as initially introduced in Paper I, in line identification and establish a reference/benchmark dataset for future spectroscopic studies, we run the ...
Zhijun Tu, Xuan Fang, Jorge García-Rojas, Robert Williams, Jifeng Liu   +4 more
doaj   +1 more source

A 3D Geometrical Model of Molecular Line Emission from Planetary Nebulae: Formulation and Applications

Galaxies
Morpho-kinematic modeling of planetary nebulae (PNe) is important in reconstructing the three-dimensional structure and dynamics of PNe in an effort to understand their formation histories.
Diana Ryder, Joel Kastner, Paula Moraga Baez   +2 more
doaj   +1 more source

LAMOST Medium-resolution Spectroscopic Survey of the Rosette Nebula

The Astronomical Journal
We report multifiber, medium-resolution spectroscopy of the Rosette Nebula with full spatial coverages, and present a table of the nebular parameters based on the spatially resolved measurements of emission lines.
Li-Yue Zhang, Chao-Jian Wu, Xuan Fang, Wei Zhang, Juan-Juan Ren, Jian-Jun Chen, Hong Wu   +6 more
doaj   +1 more source

PDRs4All

Astronomy & Astrophysics
Context. Conspicuous excess emission is present in the near-infrared (NIR) region in various objects, including reflection nebulae, planetary nebulae, and nearby galaxies. However, the spatial distribution and spectral shape of the excess emission remain
Onaka Takashi, Dartois Emmanuel, Peeters Els, Berné Olivier, Habart Emilie, Boersma Christiaan, Cami Jan, Fuente Asunción, Goicoechea Javier R., Lacinbala Ozan, Okada Yoko, Tielens Alexander G. G. M., Van De Putte Dries, Boulanger Francois, Pino Thomas, Zhang Yong   +15 more
doaj   +1 more source

Detection of CH in the O-rich Planetary Nebula NGC 6302

The Astrophysical Journal
Planetary nebulae are sites where ejected stellar material evolves into complex molecules, but the precise physical conditions and chemical routes that govern these processes are unclear.
Charmi Bhatt, Jan Cami, Els Peeters, Nicholas Clark, Paula Moraga Baez, Kevin Volk, G. C. Sloan, Joel H. Kastner, Harriet L. Dinerstein, Mikako Matsuura, Bruce Balick, Kathleen E. Kraemer, Kay Justtanont, Olivia Jones, Raghvendra Sahai, Isabel Aleman, Michael J. Barlow, Jeronimo Bernard-Salas, Joris Blommaert, Naomi Hirano, Patrick Kavanagh, Francisca Kemper, Eric Lagadec, J. Martin Laming, Frank Molster, Hektor Monteiro, Anita M. S. Richards, N. C. Sterling, Maryam Torki, Peter A. M. van Hoof, Jeremy R. Walsh, L. B. F. M. Waters, Roger Wesson, Finnbar Wilson, Nicholas J. Wright, Albert A. Zijlstra   +35 more
doaj   +1 more source

ALMA visits the QSO MUSEUM: Connecting molecular gas and the cool circumgalactic medium around 37 z ∼ 3 quasars

Astronomy & Astrophysics
Context. Extended Lyα emission is ubiquitously observed around quasars. This emission traces the cool gas within the circumgalactic medium and provides insights into the complex interplay between gas dynamics and active galactic nucleus feedback. However,
Ritter Jelena, Arrigoni Battaia Fabrizio, Peng Bo, González Lobos Jay, Chen Chian-Chou, Obreja Aura, Muñoz-Elgueta Nahir, Circosta Chiara   +7 more
doaj   +1 more source

Mapping the Extended Lyα Emission within the Circumgalactic Medium of Quasars Hosted by Dusty Starbursts with CubeCarve

The Astrophysical Journal
We present a study of extended Ly α emission around four quasars hosted by dusty starbursts, which are composite systems thought to represent a transitional stage in quasar evolution.
Kevin Hall, Hai Fu
doaj   +1 more source

MILAN Sky Survey, a dataset of raw deep sky images captured during one year with a Stellina automated telescope. [PDF]

Data Brief, 2023
Parisot O, Hitzelberger P, Bruneau P, Krebs G, Destruel C, Vandame B.   +5 more
europepmc   +1 more source

The PHANGS-MUSE/HST-Hα nebulae catalogue

Astronomy & Astrophysics
We present the PHANGS-MUSE/HST-Hα nebulae catalogue, comprising 5177 spatially resolved nebulae across 19 nearby star-forming galaxies (D < 20 Mpc), based on high-resolution Hα imaging from HST, homogenised to a fixed (10 pc) physical resolution and ...
Barnes A. T., Chandar R., Kreckel K., Belfiore F., Pathak D., Thilker D., Leroy A. K., Groves B., Glover S. C. O., McClain R., Amiri A., Bazzi Z., Boquien M., Congiu E., Dale D. A., Egorov O. V., Emsellem E., Grasha K., Gonzalez Lobos J., Henny K., He H., Indebetouw R., Lee J. C., Li J., Liang F.-H., Larson K., Maschmann D., Meidt S. E., Eduardo Méndez-Delgado J., Neumann J., Pan H.-A., Querejeta M., Rosolowsky E., Sarbadhicary S. K., Scheuermann F., Úbeda L., Williams T. G., Weinbeck T. D., Whitmore B., Wofford A.   +39 more
doaj   +1 more source