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Thursday, May 14, 2020 | History

2 edition of Infrared reflection in Orion molecular cloud 2 found in the catalog.

Infrared reflection in Orion molecular cloud 2

Infrared reflection in Orion molecular cloud 2

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  • 30 Currently reading

Published by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffet Field, Calif, [Springfield, Va .
Written in English

    Subjects:
  • Infrared telescopes.,
  • Orion (Constellation)

  • Edition Notes

    StatementYvonne Pendleton ... [et al.].
    SeriesNASA technical memorandum -- 88259., Preprint series / Airborne Astronomy Program, Medium Altitude Missions Branch -- 053., Preprint series (Airborne Astronomy Program. Medium Altitude Missions Branch) -- 053.
    ContributionsPendleton, Yvonne J., Ames Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15292923M

    A molecular cloud is a cold, dense interstellar cloud that contains a high fraction of molecules, of which close to different types have been discovered in space (see interstellar molecules).It is widely believed that the relatively high density of dust particles in these clouds plays an important role in the formation and protection of the molecules.   The Orion Nebula is arguably the finest of all nebulae within the Milky Way visible from the Northern Hemisphere. With a gaseous repository of 10, suns, and illuminated by a cluster of hot young stars, the clouds of Messier 42 — as it is also known — glow with fantastic colours and shapes, giving us a bird’s eye view of one of the greatest star forming nurseries in our part of the.

    One of our Greatest Hits! The Orion Nebula, or Mess is a H II region excited by stars in the Trapezium Cluster, the dense concentration of bright, hot stars near the center of the total, the Trapezium and the associated cluster contains more than three thousand stars. The Nebula itself is a gaseous bubble formed on the front side of the Orion A Molecular Cloud. Hofmann R., Davis D.S., Larson H.P. () Infrared Extinction in Molecular Clouds: The Form of the Curve In Orion. In: Israel F.P. (eds) Light on Dark Matter. Astrophysics and Space Science Library (A Series of Books on the Recent Developments of Space Science and of General Geophysics and Astrophysics Published in Connection with the Journal Author: R. Hofmann, D. S. Davis, H. P. Larson.

    Near-infrared photons escape the dusty Orion molecular cloud much more easily than optical photons, enabling detection of hundreds of stars embedded within the cloud core that lies just behind the Trapezium. Since the opacity of a typical molecular cloud to 1 keV photons is approximately the same as the dust opacity of such a cloud at 2 microns, itFile Size: KB. We present an unbiased survey at μm of a sq. deg. region surrounding the core of Orion Molecular Cloud 2 (OMC-2). Analysis of the source counts and colors indicates that the majority of the sources brighter than K=+13 are not field stars. They must be members of a young association or associations within the survey area.


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Infrared reflection in Orion molecular cloud 2 Download PDF EPUB FB2

New observations of Orion Molecular Cloud 2 have been made from 1 to microns using the NASA Infrared Telescope Facility and the Kuiper Airborne Observatory. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The Orion Molecular Cloud 2/3 region (hereafter, OMC-2/3) and the reflection nebula NGC encompass a section of the Orion A molecular cloud undergoing vigorous star forming activity.

One of the richest assemblages of protostars in the nearest pc is seen in OMC-2/3, while NGC contains a cluster of over young : Dawn E. Peterson, Tom Megeath. This paper reports micron photometry for 11 discrete sources in Orion Molecular Cloud-2 (OMC-2).

These data, combined with H and K photometric and K polarimetric images, are used to model the cluster sources. Most appear to be young stars of roughly solar mass. Some have circumstellar dust reradiation or reflection by: Infrared reflection nebulae in Orion Molecular Cloud 2.

By D. Lester, R. Capps, M. Werner and Yvonne Pendleton. Abstract. New observations of Orion Molecular Cloud 2 have been made from 1 to microns using the NASA Infrared Telescope Facility and the Kuiper Airborne Observatory.

An extensive program of polarimetry, photometry, and. Aperture synthesis observations of the CS J = 2 to 1 line and 95 GHz continuum emission from a 2 arcmin x 3 arcmin region around IRc2 in the OMC-1 molecular cloud.

Orion Molecular Cloud 2(OMC-2) is an infrared and molecular emission complex (see image right) about 12' northeast of the Trapezium, centered on a cluster of infrared sources.

Infrared reflection in Orion molecular cloud 2 book Protoplanetary systems in the Orion Complex. Orion A. The giant molecular cloud Orion A is the most active star-forming region in the local neighbourhood of the sun.

In the last few million years about young stellar objects were formed in this region, including about protostars and about pre-main sequence stars. The Orion A cloud has a mass in the order of 10 5 M ☉. The stars in Orion A do not have the same distance to llation: Orion.

Herschel's far-infrared view of Orion B also shows other pockets of star-forming gas and dust nestled in the intricate structure of this cloud: NGCalso known as the Flame Nebula, and NGC on the right side of the image, to the left of the Horsehead Nebula; and NGC and NGC on the left side of the image.

Abstract: The Orion Molecular Cloud 2/3 region (hereafter, OMC-2/3) and the reflection nebula NGC encompass a section of the Orion A molecular cloud undergoing vigorous star forming activity. One of the richest assemblages of protostars in the nearest pc is seen in OMC-2/3, while NGC contains a cluster of over young by: 2.

New observations of Orion Molecular Cloud 2 have been made from 1 to microns using the NASA Infrared Telescope Facility and the Kuiper Airborne Observatory. An extensive program of polarimetry, photometry, and spectrophotometry has shown that the extended emission regions associated with two of the previously known near-infrared sources, IRS 1 and IRS 4, are infrared reflection nebulae Cited by: CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): (Received; accepted) We present the polarization images in the J, H, & Ks bands of the Orion Molecular Cloud 1 South region.

The polarization images clearly show at least six infrared reflection nebulae (IRNe) which are barely seen or invisible in the intensity images. The Orion Molecular Cloud 2/3 region (hereafter, OMC-2/3) and the reflection nebula NGC encompass a section of the Orion A molecular cloud undergoing vigorous star forming activity.

One of the richest assemblages of protostars in the nearest pc is seen in OMC-2/3, while NGC contains a cluster of over young stars. In this review, we present a census of the protostars, pre Cited by: 2.

Classroom Aid - The Great Orion Molecular Cloud David Butler. Reflective like the Witch Head Nebula, emission like the Rosette Nebula NGC along with.

This paper reports micron photometry for 11 discrete sources in Orion Molecular Cloud-2 (OMC-2). These data, combined with H and K photometric and K polarimetric images, are used to model the cluster sources. Most appear to be young stars of roughly solar mass.

Some have circumstellar dust reradiation or reflection nebulosity. New observations of the high velocity CO emission and near infrared H 2 lines in the Orion Kleinmann-Low nebula are described. The CO emission which is detected out to ± 50 km s −1 from the line centre is characterized by low opacity (τ ≤ 2) and an angular diameter of only 37” or × 10 17 cm at pc.

We have mapped the Orion Molecular Ridge (OMC-1 and OMC-2) in the fine-structure lines [C II] μm and [O I] 63 and maps cover a region of 7' × 18' (Δα × Δδ) and are fully sampled toward the Orion A H II region/molecular cloud interface. The emission maximum near the molecular region S6/FIR4 arises most probably from a photodissociation region (PDR) on the surface of that.

The Orion Molecular Cloud 2/3 region (hereafter, OMC-2/3) and the reflection nebula NGC encompass a section of the Orion A molecular cloud undergoing vigorous star forming activity.

One of the richest assemblages of protostars in the nearest pc is seen in OMC-2/3, while NGC contains a cluster of over young stars. The infrared source IRc2 (ref. 1) in the star-forming region Orion-KL is generally believed to contain a massive and very young star2.

Its nature and Cited by:   The molecular cloud in the Orion nebula, at about parsecs from Earth, gives us our closest view of massive-star formation. It has been predicted from star-formation models that the gases.

About light-years from Earth lies the Orion A molecular cloud, the nearest known massive stellar nursery. The new image was taken using the VISTA infrared survey telescope at .We have used infrared polarimetry to probe the infrared cluster in Orion Molecular Cloud-2 (OMC-2).

and molecular emission located about 12' northeast of the Trapezium. Catley et a1 () have shown that, at pm, OMC-2 contains five point sources plus extended emission. We use their nomenclature (IRSl,IRS2,etc.) to identify the point sources. Orion A is located within the 'sword of Orion' – below the three main stars that form the belt of the Orion constellation.

This image shows the glow of cosmic dust in the interstellar material that pervades the cloud, revealing an intricate pattern of filaments dotted with a few compact, bright cores: the seeds of future stars.