Results 141 to 150 of about 136,681 (287)

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

Assignment of the λ1369.13 Diffuse Interstellar Absorption Band and Three Other Far‐Ultraviolet Interstellar Absorption Lines to the CH Molecule

The Astrophysical Journal, 2001
The three unidentified interstellar lines λλ1368.74, 1369.13, and 1370.87 are here assigned to the CH molecule, including the diffuse interstellar band (DIB) at 1369.13 A. A consistent rotational assignment of the interstellar lines and the 3d-X 2Π laboratory spectrum is presented.
openaire   +2 more sources

Line-Leaking Models for Interstellar Molecular Emission and Absorption--II MASERS IN THE METHYL ALCOHOL SPECTRUM [PDF]

, 1975
M. R. Pelling
openalex   +1 more source

Elemental Abundances in the Diffuse Interstellar Medium from Joint Far-ultraviolet and X-Ray Spectroscopy: Iron, Oxygen, Carbon, and Sulfur

The Astronomical Journal
In this study, we investigate interstellar absorption lines along the line of sight toward the galactic low-mass X-ray binary Cygnus X-2. We combine absorption line data obtained from high-resolution X-ray spectra collected with the Chandra and XMM ...
I. Psaradaki, L. Corrales, J. Werk, A. G. Jensen, E. Costantini, M. Mehdipour, R. Cilley, N. Schulz, J. Kaastra, J. A. García, L. Valencic, T. Kallman, F. Paerels   +12 more
doaj   +1 more source

HI 21cm-line Observations with the GMRT Towards Interstellar Clouds Previously Seen in Optical Absorption [PDF]

, 2002
Rekhesh Mohan, K. S. Dwarakanath, G. Srinivasan, Jayaram N. Chengalur   +3 more
openalex   +1 more source

Photocleavage of Aliphatic C–C Bonds in the Interstellar Medium

The Astrophysical Journal
Ultraviolet (UV) processing in the interstellar medium (ISM) induces the dehydrogenation of hydrocarbons. Aliphatics, including alkanes, are present in different interstellar environments, being prevalently formed in evolved stars; thus, the ...
Guillermo Tajuelo-Castilla, Jesús I. Mendieta-Moreno, Mario Accolla, Jesús M. Sobrado, Sofia Canola, Pavel Jelínek, Gary J. Ellis, José Ángel Martín-Gago, Gonzalo Santoro   +8 more
doaj   +1 more source

Interstellar spectral features and telluric absorption lines

, 2012
In good quality spectra of stars the weak interstellar absorption lines may be substantially contaminated by telluric lines. Many telluric lines may also simulate interstellar absorptions. To avoid undesirable telluric effects during searches for interstellar absorptions, especially for diffuse interstellar bands (DIBs), we looked for all accessible ...
Kuźmicz, Agnieszka, Wszołek, B.
openaire   +2 more sources

New aspects of absorption line formation in intervening turbulent clouds -- II. Monte Carlo simulation of interstellar H+D Ly  absorption profiles [PDF]

, 1997
S. A. Levshakov, W. H. Kegel, I. E. Mazets   +2 more
openalex   +1 more source

Measuring Interstellar Carbon Abundance via 158 μm [C ii] Absorption with SOFIA—A Potential Detection and Proof-of-concept for Depletion Studies with Future Far-IR Facilities

The Astronomical Journal
Carbon plays key roles in the interstellar medium (ISM)—as a constituent of dust, as the carrier of the dominant far-infrared (FIR) cooling line, and as a component of various important molecules.
Christopher J. R. Clark, Julia. C. Roman-Duval, Suzanne C. Madden, Marc Mertens, Claire E. Murray, Jürgen Stutzki, Elizabeth Tarantino, Kirill Tchernyshyov   +7 more
doaj   +1 more source

The Structure of the Local Interstellar Medium. VII. Additional New Mg ii, Fe ii, and Mn ii Observations toward Stars within 100 pc

The Astrophysical Journal
We present new high-resolution ( R  ∼ 114,000), near-ultraviolet spectra in the direction of 36 nearby (
Azmain H. Nisak, Seth Redfield, Jeffrey L. Linsky, Brian E. Wood, Allison Youngblood   +4 more
doaj   +1 more source