Sentences with phrase «ob stars»

As a result, we find that the interband ratio of PAH 7.7 $ \ mu $ m / PAH 11.3 $ \ mu $ m varies locally near M17SW, but rather independently of the distance from the OB stars in M17, suggesting that the degree of PAH ionization is mainly controlled by local conditions rather than the global UV environments determined by the OB stars in M17.

To maintain its ionization it requires about 80 % of the ionizing radiation from all OB stars in the Galaxy; this is presumably supplied by UV photons leaking from HII regions.

Underhill collected a lot of data on OB stars at Victoria but quickly realized that no existing mathematical model could interpret her data.

Underhill specialized in the study of «early - type stars» or «OB stars»; that is, very hot blue stars.

O and B stars frequently occur together in loose groupings, and are often collectively referred to as OB stars.

Star formation activity in AFGL333 is comparable to that of nearby low - mass star forming regions despite being near OB stars.

OB stars are very hot blue stars with thick atmospheres.

In 1985, Bolton and his colleague Douglas R. Gies demonstrated that not all «ejected» OB stars (runaway stars that travel at very high speeds through open space) are the result of the supernova explosion of a companion star.

Instead, many are produced by gravitational interactions that occur within OB star clusters.

Not exact matches

The higher risk obstetric wards were also really lovely, with communal sitting rooms for post-partum women and the offer of iPod players, electric tealight «candles», electric oil burners, etc. the ob wards were definitely more «sterile» than the FBCs, but at the end of the day you're staying in a hospital, not a five star hotel.

She was a strong advocate for skin - to - skin and I think that because all of the stars were aligned that my pediatrician was 100 % on - board, the OB and the nursing staff; I think it just allowed everything to happen the way I envisioned it to happen.

An OB association is a relatively young, yet widely dispersed grouping of stars.

The cloud is one of several affiliated dark clouds found in a loose star cluster called the Scorpius - Centaurus OB association.

It continues through the Cygnus X complex of star formation regions, which includes Cyg OB2, one of the most luminous OB associations known in the local group of galaxies.

We identify PSO J060.3200 +25.9644 (near - infrared spectral type L1) and PSO J077.1033 +24.3809 (L2) as new members of Taurus based on... ▽ More We present the discovery of eight young M7 - L2 dwarfs in the Taurus star - forming region and the Scorpius - Centaurus OB Association, serendipitously found during a wide - field search for L / T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-infrared) photometry.

An OB association consists of many hot blue - giant stars, spectral classes O and B, and a relatively small number of other objects.

... of very massive stars (called OB associations after the spectral type of their most prominent members, O and B stars) or to bound clusters of less massive stars.

Multiple planets transiting the same star reveal more: period ratios determine stability and dynamics, mutual gravitational interactions reflect planet masses and orbital shapes, and the fraction of transiting planets obs... ▽ More When an extrasolar planet passes in front of its star (transits), its radius can be measured from the decrease in starlight and its orbital period from the time between transits.

1806 - 20 contains at least three Wolf - Rayet stars, an OB supergiant, the soft gamma repeater SGR 1806 - 20 and LBV 1806 - 20, once of the most luminous stars in the Milky Way.

Assuming that the Local Bubble or Chimney was created by the supernovae of young, massive stars during the past few million years, some astronomers have been looking for their probable source among the 27 member B stars of the Pleiades moving group, which are located towards the nearest part of Gould's Belt of massive hot, OB - type stars (more discussion in pdf).

I give due respect to the expert who has done my OB assignment, a definite 5 star.

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Dirty Laundry Get Dirty, Book # 2 By Lauren Landish Author's Website: http://www.laurenlandish.com/ Brought to you by OBS reviewer Heidi Tabloid reporter, Elise, has been following country star, Keith Perkins, trying to find out any big dark secrets he may have so she can expose them!