Results 41 to 50 of about 199,190 (345)

A Catalog of Hα Emission-line Stars and 785 Newly Identified Young Stellar Object Candidates from LAMOST Based on a Deep Learning Method

The Astrophysical Journal Supplement Series
The H α emission line commonly appears in the spectra of many stars and serves as a key indicator for tracing ionized interstellar gas, investigating stellar activity, and studying gas dynamics.
Lei Tan, Ying Mei, Jiale Qian, Xiaolong Wang, Yue Cui, Aixin Huang, Feng Wang, Hui Deng, Chao Liu, Huanbin Chi   +9 more
doaj   +1 more source

Investigation of the Nature of the B[e] Star CI Cam in the Optical Range

Galaxies
The B[e] phenomenon is observed in a wide range of stars at various evolutionary stages. Its nature remains uncertain. The B[e] phenomenon is defined as the simultaneous presence of low-excitation forbidden line emission and strong infrared excess in the
Elena A. Barsukova, Vitaly P. Goranskij, Aleksandr N. Burenkov, Ilya A. Yakunin   +3 more
doaj   +1 more source

Intensity Interferometry Observations of the Hα Envelope of γCas with MéO and a Portable Telescope

The Astronomical Journal, 2023
We report on observations of the extended environment of the bright Be star γ -Cas performed using intensity interferometry measurements within its H α emission line.
Nolan Matthews, Jean-Pierre Rivet, David Vernet, Mathilde Hugbart, Guillaume Labeyrie, Robin Kaiser, Julien Chabé, Clément Courde, Olivier Lai, Farrokh Vakili, Olivier Garde, William Guerin   +11 more
doaj   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

The Gaia satellite: a tool for Emission Line Stars and Hot Stars [PDF]

, 2008
The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each star and spectra for stars till V magnitude equal to
Alecian, Evelyne, Blomme, Ronny, Borges, Marcelo, Bouret, Jean-Claude, Briot, Danielle, De Batz, Bertrand, Floquet, Michele, Fremat, Yves, Hubert, Anne-Marie, Jonckheere, Anthony, Kolka, Indrek, Lanz, Thierry, Leroy, Bernard, Martayan, Christophe, Martins, Fabrice, Meynet, Georges, Miroshnichenko, Anatholy, Nazé, Yael, Neiner, Coralie, Sordo, Rosanna, Stee, Philippe, Zorec, Jean   +21 more
core   +3 more sources

The physics and chemistry of circumstellar envelopes of S-stars on the AGB

, 2007
The S-stars have been suggested to be a brief transitional phase as stars evolve from oxygen-rich M-type stars into carbon stars, through the dredge up of carbon from He-shell burning.
Olofsson, H., Ramstedt, S., Schoeier, F. L.   +2 more
core   +1 more source

New Models for Wolf-Rayet and O Star Populations in Young Starbursts [PDF]

, 1997
Using the latest stellar evolution models, theoretical stellar spectra, and a compilation of observed emission line strengths from Wolf-Rayet (WR) stars, we construct evolutionary synthesis models for young starbursts.
Allen S. W., Arnault Ph., Braun H., Cervino M., Contini T., Copetti M. V. F., Daniel Schaerer, de Loore C., Diaz A. I., Doherty R. M., Eenens P. R. J., Esteban C., Garcia-Vargas M., Garmany C. D., Hamann W. R., Kingsburgh R. L., Kingsburgh R. L., Koesterke L., Kruger H., Kunth D., Lundstrom I., Maeder A., Maeder A., Maeder A., Maeder A., Maeder A., Mas-Hesse J. M., Meynet G., Meynet G., Moffat A. F. J., Olofsson K., Pagel B. E. J., Schaerer D., Schaerer D., Schaerer D., Schaerer D., Schaller G., Seaton M. J., Smith L. F., Smith L. F., Stasinska G., Terlevich E., Vanbeveren D., Vanbeveren D., William D. Vacca   +44 more
core   +2 more sources

Aggressive prostate cancer is associated with pericyte dysfunction

Molecular Oncology, EarlyView.
Tumor‐produced TGF‐β drives pericyte dysfunction in prostate cancer. This dysfunction is characterized by downregulation of some canonical pericyte markers (i.e., DES, CSPG4, and ACTA2) while maintaining the expression of others (i.e., PDGFRB, NOTCH3, and RGS5).
Anabel Martinez‐Romero, Ane Martinez‐Larrinaga, Joaquim Grego‐Bessa, Saioa Garcia‐Longarte, Hielke van Splunder, Ianire Astobiza, Amaia Ercilla, Laura Bozal‐Basterra, Isabel Mendizabal, Pilar Villacampa, Arkaitz Carracedo, Mariona Graupera   +11 more
wiley   +1 more source

Properties of Galactic B[e] Supergiants. X. Refined Orbit and Fundamental Parameters of the HD 327083 Binary System

The Astrophysical Journal
HD 327083 is a binary system that consists of two supergiant components and exhibits the B[e] phenomenon. In this paper, we report the determination of a new set of the system’s fundamental parameters using a combination of photometric and spectroscopic ...
A. S. Nodyarov, A. S. Miroshnichenko, S. A. Khokhlov, S. V. Zharikov, A. T. Agishev, I. A. Gabitova, N. L. Vaidman, N. Manset   +7 more
doaj   +1 more source

Weak Metallic Emission Lines in Early B-Type Stars

, 2017
Previously unrecognized weak emission lines originating from high excitation states of Si II (12.84 eV) and Al II (13.08 eV) are detected in the red region spectra of slowly rotating early B-type stars.
Nishimura, Masayoshi, Sadakane, Kozo
core   +1 more source