Results 61 to 70 of about 20,255 (236)

The Study of Nebular Emission on Nearby Spiral Galaxies in the IFU Era

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
A new generation of wide‐field emission‐line surveys based on integral field units (IFU) is allowing us to obtain spatially resolved information of the gas‐phase emission in nearby late‐type galaxies, based on large samples of HII regions and full two‐dimensional coverage.
Fernando Fabián Rosales-Ortega, José Manuel Vílchez Medina   +1 more
wiley   +1 more source

The Optical Gravitational Lensing Experiment. Is Interstellar Extinction Toward the Galactic Center Anomalous?

, 2002
Photometry of the Galactic bulge, collected during the OGLE-II microlensing search, indicates high and non-uniform interstellar extinction toward the observed fields.
A. Udalski, Mizerski T., Ortolani S., Paczynski B., Paczynski B., Schultheis M., Stanek K. Z., Udalski A., Udalski A.   +8 more
core   +1 more source

A Slowly Pulsating Run‐Away B Star at High Galactic Latitude Ejected From a Spiral Arm

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT We report the discovery of the young B6 V run‐away star LAMOST J083323.18 + 430825.4, 2.5 kpc above the Galactic plane. Its atmospheric parameters and chemical composition are determined from LAMOST spectra, indicating normal composition. Effective temperature (Teff$$ {T}_{\mathrm{eff}} $$ = 14,500$$ \mathrm{14,500} $$ K) and gravity (logg ...
Ulrich Heber, Maximilian Halenke, Aakash Bhat, Veronika Schaffenroth   +3 more
wiley   +1 more source

Studying the Interstellar Medium of H II/BCD Galaxies Using IFU Spectroscopy

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
We review the results from our studies, and previous published work, on the spatially resolved physical properties of a sample of H ii/BCD galaxies, as obtained mainly from integral‐field unit spectroscopy with Gemini/GMOS and VLT/VIMOS. We confirm that, within observational uncertainties, our sample galaxies show nearly spatially constant chemical ...
Patricio Lagos, Polychronis Papaderos, Jorge Iglesias Páramo   +2 more
wiley   +1 more source

Evidence for Extremely High Dust Polarization Efficiency in NGC 3184

, 2002
Recent studies have found the Type II-plateau supernova (SN) 1999gi to be highly polarized (p_max = 5.8%, where p_max is the highest degree of polarization measured in the optical bandpass; Leonard & Filippenko 2001) and minimally reddened (E[B-V] = 0.21
Alexei V. Filippenko, Berdyugin A., Douglas C. Leonard, Hoflich P., Mathewson D. S., McCall M. L., Ryan Chornock, Scarrott S. M., Teerikorpi P., Weidong Li, Whittet D. C. B.   +10 more
core   +1 more source

Infrared observations of the candidate double neutron star system PSR J1811-1736 [PDF]

, 2012
PSR J1811-1736 (P=104 ms) is an old (~1.89 Gyrs) binary pulsar (P_orb=18.8 d) in a highly eccentric orbit (e=0.828) with an unidentified companion. Interestingly enough, the pulsar timing solution yields an estimated companion mass 0.93 M_{\odot}
Corongiu, A., Ferraro, F. R., Mignani, R. P., Pallanca, C.   +3 more
core   +2 more sources

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Are Wolf‐Rayet Stars Able to Pollute the Interstellar Medium of Galaxies? Results from Integral Field Spectroscopy

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
We investigate the spatial distribution of chemical abundances in a sample of low metallicity Wolf‐Rayet (WR) galaxies selected from the SDSS. We used the integral field spectroscopy technique in the optical spectral range (3700 Å–6850 Å) with PMAS attached to the CAHA 3.5 m telescope.
Enrique Pérez-Montero, Carolina Kehrig, Jarle Brinchmann, José M. Vílchez, Daniel Kunth, Florence Durret, Polychronis Papaderos   +6 more
wiley   +1 more source

The Optical to Infrared 0.6–5.3 μm Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2

The Astrophysical Journal Letters
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 μ m ...
Shu Wang, Xiaodian Chen
doaj   +1 more source

The extinction curve in the visible and the value of Rv

, 2012
This article discusses the interstellar extinction curve in the visible and the value of Rv. It is concluded that the visible extinction curve is likely to be linear in the visible, and that indirect estimates of Rv from tentative determinations of Av ...
Ardeberg, Balázs, Bondar, Borgman, Cardelli, Divan, Greenstein, Greenstein, Greenstein, Hall, Henyey, Henyey, Hoyle, Johnson, Johnson, Johnson, Le Borgne, Mendoza, Nandy, Rozis-Saulgeot, Savage, Schalén, Schild, Schlafly, Schlegel, Schultz, Sherwood, Stead, Stebbins, Stebbins, Trumpler, Turner, Wegner, Whitford, Wickramasinghe, Zagury, Zagury   +36 more
core   +1 more source