File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Search for calibrators for the submillimeter array. I. High-mass star-forming regions

TitleSearch for calibrators for the submillimeter array. I. High-mass star-forming regions
Authors
KeywordsH Ii Regions
Radio Continuum: Ism -
Techniques: Interferometric
Issue Date2004
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2004, v. 616 n. 1 II, p. L39-L42 How to Cite?
AbstractWe present initial results of an ongoing search for interferometric calibrators at submillimeter wavelengths with the Submillimeter Array (SMA). Powerful radio galaxies are commonly used as calibrators at centimeter and millimeter wavelengths, but many are not strong enough to serve as calibrators at submillimeter wavelengths because of their rapidly declining flux densities toward shorter wavelengths. The inability to find a calibrator close to the target source may limit or even prevent us from imaging many interesting sources at submillimeter wavelengths. Here, we investigate whether high-mass protostellar objects and ultracompact H II regions can serve as useful calibrators for the SMA. The dust emission associated with these objects makes them among the brightest submillimeter sources in the sky. Our observations at 0.85 mm (345 GHz) with an angular resolution of ∼3″ reveal that although a large fraction of the dust emission originates from an extended "halo" component, a compact unresolved component often remains that when sufficiently strong may serve as a useful calibrator. These observations also provide a first glimpse at the small-scale distribution of dust around ultracompact H II regions and high-mass protostellar objects at submillimeter wavelengths. We discuss the origin of the core-halo structure seen in many sources and conclude with suggestions for future searches for calibrators with the SMA.
Persistent Identifierhttp://hdl.handle.net/10722/174923
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
References

 

DC FieldValueLanguage
dc.contributor.authorSu, YNen_US
dc.contributor.authorLiu, SYen_US
dc.contributor.authorLim, Jen_US
dc.contributor.authorOhashi, Nen_US
dc.contributor.authorBeuther, Hen_US
dc.contributor.authorZhang, Qen_US
dc.contributor.authorSollins, Pen_US
dc.contributor.authorHunter, Ten_US
dc.contributor.authorSridharan, TKen_US
dc.contributor.authorZhao, JHen_US
dc.contributor.authorHo, PTPen_US
dc.date.accessioned2012-11-26T08:48:09Z-
dc.date.available2012-11-26T08:48:09Z-
dc.date.issued2004en_US
dc.identifier.citationAstrophysical Journal Letters, 2004, v. 616 n. 1 II, p. L39-L42en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174923-
dc.description.abstractWe present initial results of an ongoing search for interferometric calibrators at submillimeter wavelengths with the Submillimeter Array (SMA). Powerful radio galaxies are commonly used as calibrators at centimeter and millimeter wavelengths, but many are not strong enough to serve as calibrators at submillimeter wavelengths because of their rapidly declining flux densities toward shorter wavelengths. The inability to find a calibrator close to the target source may limit or even prevent us from imaging many interesting sources at submillimeter wavelengths. Here, we investigate whether high-mass protostellar objects and ultracompact H II regions can serve as useful calibrators for the SMA. The dust emission associated with these objects makes them among the brightest submillimeter sources in the sky. Our observations at 0.85 mm (345 GHz) with an angular resolution of ∼3″ reveal that although a large fraction of the dust emission originates from an extended "halo" component, a compact unresolved component often remains that when sufficiently strong may serve as a useful calibrator. These observations also provide a first glimpse at the small-scale distribution of dust around ultracompact H II regions and high-mass protostellar objects at submillimeter wavelengths. We discuss the origin of the core-halo structure seen in many sources and conclude with suggestions for future searches for calibrators with the SMA.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectH Ii Regionsen_US
dc.subjectRadio Continuum: Ism -en_US
dc.subjectTechniques: Interferometricen_US
dc.titleSearch for calibrators for the submillimeter array. I. High-mass star-forming regionsen_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-12344272145en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-12344272145&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume616en_US
dc.identifier.issue1 IIen_US
dc.identifier.spageL39en_US
dc.identifier.epageL42en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridSu, YN=35753955800en_US
dc.identifier.scopusauthoridLiu, SY=7409459358en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US
dc.identifier.scopusauthoridOhashi, N=7202558313en_US
dc.identifier.scopusauthoridBeuther, H=10140586700en_US
dc.identifier.scopusauthoridZhang, Q=8602636100en_US
dc.identifier.scopusauthoridSollins, P=7004013438en_US
dc.identifier.scopusauthoridHunter, T=35394114700en_US
dc.identifier.scopusauthoridSridharan, TK=6701592129en_US
dc.identifier.scopusauthoridZhao, JH=7410310692en_US
dc.identifier.scopusauthoridHo, PTP=7402211489en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats