Neutral Hydrogen Associated with NGC 7129

Details Neutral Hydrogen Associated with NGC 7129 Neutral Hydrogen Associated with NGC 7129

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...592..176m&link_type=abstract

The Astrophysical Journal, Volume 592, Issue 1, pp. 176-187.

Astronomy and Astrophysics

Astronomy

2

Ism: Atoms, Ism: Clouds, Ism: Individual: Ngc Number: Ngc 7129, Ism: Reflection Nebulae, Stars: Formation, Stars: Pre-Main-Sequence

Scientific paper

Observations of the environment of the star-forming region NGC 7129 obtained with an angular resolution of 1' in the 21 cm line of H I are described. Two features of the image are extensively discussed: (1) a ring of H I emission about 30' in extent and (2) a relatively dense concentration of H I with unusually wide line profiles positionally coincident with the B star BD +65°1638. The H I ring is consistent with photodissociation of H2 by the interstellar UV radiation field at the surface of an extended molecular cloud in which both BD +65°1638 and NGC 7129 are situated. We further show that BD +65°1638 appears to be an unusual example of a ``dissociating star'' surrounded by an extensive region of photodissociated H2 and accompanied by a small H II region. The derived spectral type (B2.5) and the absolute magnitude for BD +65°1638 further suggest that the latter is very close to the birthline. The very young stellar age implied by the parameters of the H I region, considerably less than 104 yr, is discussed, and the properties of the H I region are compared with those of the prototype for this rare class of objects. We discuss both aspects within the context of star formation in NGC 7129.

Affiliated with

Also associated with

No associations

Rating

Neutral Hydrogen Associated with NGC 7129 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Neutral Hydrogen Associated with NGC 7129, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutral Hydrogen Associated with NGC 7129 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1465513