Results 51 to 60 of about 52,995 (203)
Preliminary results on interstellar reddening as deduced from filter photometry [PDF]
, 1972 Filter photometry has been used to derive the interstellar reddening law from stars through the study of a single spectral type, B0. The deficiency in the far ultraviolet flux of a supergiant relative to a main sequence star is compared with the ...
Laget, M.
core
The Astrophysical JournalIn the most precise distance ladder determination of H _0 , the observed near-infrared fluxes of Cepheids are corrected for dust, assuming that the extinction law in large, star-forming spiral hosts of Type Ia supernovae (SNe Ia) is similar to the Milky ...
Yukei S. Murakami +6 more
doaj +1 more source
The formation of molecular hydrogen in the interstellar medium [PDF]
, 2010 H2 is the most abundant molecule in the interstellar medium and forms on the surface of interstellar dust grains. Laboratory studies have been conducted of HD formation on a dust grain analogue, which is a highly-oriented pyrolytic graphite surface ...
Islam, F.
core
RELATION BETWEEN ELEMENT DEPLETION AND INTERSTELLAR REDDENING IN THE DIRECTION OF OB STARS
, 1992 We have studied the interstellar column densities of AlII, SiII, SII, FeII, NiII, and ZnII in the direction of 18 O- and 6 B-type stars so as to improve the relations of element depletions with E(B-V), and to look for other possible relations with two ...
MENTESE, HH
core +1 more source
oMEGACat. VII. Tracing Interstellar and Intracluster Medium of ω Centauri Using Sodium Absorptions
The Astrophysical JournalWe investigate the foreground interstellar medium along the line of sight and intracluster medium of ω Centauri ( ω Cen) by measuring the equivalent width of Na I D absorptions from MUSE observations. The large line-of-sight velocity difference between ω
Z. Wang +16 more
doaj +1 more source
Large Interstellar Polarisation Survey
Astronomy & AstrophysicsOur understanding of dust in the diffuse interstellar medium remains incomplete with regard to the structure, composition, size distribution, and alignment properties of its grains.
Siebenmorgen Ralf +4 more
doaj +1 more source
The Panchromatic Hubble Andromeda Treasury. XX. The Disk of M31 is Thick
The Astronomical Journal, 2023 We present a new approach to measuring the thickness of a partially face-on stellar disk, using dust geometry. In a moderately-inclined disk galaxy, the fraction of reddened stars is expected to be 50% everywhere, assuming that dust lies in a thin ...
Julianne J. Dalcanton +8 more
doaj +1 more source
Interstellar Reddening Effect on the Age Dating of Population II Stars
Galaxies, 2017 The age measurement of the stellar halo component of the Galaxy is based mainly on the comparison of the main sequence turn-off luminosity of the globular cluster (GC) stars with theoretical isochrones.
Sergio Ortolani +2 more
doaj +1 more source
Equivalent Width of the Interstellar Na i D1 and D2 Absorption Lines for Stars with E(B−V) < 0.15
New measurements of the equivalent width of the interstellar Na i D1 and D2 absorption lines for 62 bright B-type stars with E(B − V) < 0.15 are used to recalibrate the relation between these quantities in this low-reddening regime, and to quantify the ...
Maxted, Pierre F. L.
core +1 more source
The Effect of a Nonuniversal Extinction Curve on the Wesenheit Function and Cepheid Distances
The Astrophysical Journal LettersThe Wesenheit function is widely used to reduce the effects of interstellar reddening in distance measurements. Its construction, however, relies on the assumption of a universal extinction curve and on fixed values of the total-to-selective extinction ...
Dorota M. Skowron +3 more
doaj +1 more source