IRAS 22198+6336: DISCOVERY OF AN INTERMEDIATE-MASS HOT CORE

Journal Article · Fri Oct 01 04:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/721/2/L107· OSTI ID:21452785

Sanchez-Monge, Alvaro; Estalella, Robert ^[1]; Palau, Aina ^[2]; Kurtz, Stan ^[3]; Qizhou, Zhang ^[4]; Di Francesco, James ^[5]; Shepherd, Debra ^[6]

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1. Departament d'Astronomia i Meteorologia (IEEC-UB), Institut de Ciencies del Cosmos, Universitat de Barcelona, Marti i Franques, 1, E-08028 Barcelona (Spain)
2. Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB-Facultat de Ciencies, Torre C5-parell 2, E-08193 Bellaterra, Catalunya (Spain)
3. Centro de RadioastronomIa y Astrofisica, Universidad Nacional Autonoma de Mexico, Apdo. Postal 3-72, 58090, Morelia, Michoacan (Mexico)
4. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
5. Conseil national de recherches Canada, Institut Herzberg d'astrophysique, 5071 West Saanich Road, Victoria, BC (Canada)
6. NRAO, P.O. Box O, Socorro, NM 87801-0387 (United States)

We present new Submillimeter Array and Plateau de Bure Interferometer observations of the intermediate-mass object IRAS 22198+6336 in the millimeter continuum and in several molecular line transitions. The millimeter continuum emission reveals a strong and compact source with a mass of {approx}5 M {sub sun} and with properties of Class 0 objects. CO emission shows an outflow with a quadrupolar morphology centered on the position of the dust condensation. The CO outflow emission seems to come from two distinct outflows, one of them associated with SiO outflow emission. A large set of molecular lines has been detected toward a compact dense core clearly coincident with the compact millimeter source, and showing a velocity gradient perpendicular to the outflow traced by CO and SiO. The chemically rich spectrum and the rotational temperatures derived from CH{sub 3}CN and CH{sub 3}OH (100-150 K) indicate that IRAS 22198+6336 is harboring one of the few intermediate-mass hot cores known at present.

• OSTI ID: 21452785
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 721; ISSN 2041-8205
• Country of Publication: United States
• Language: English

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79 ASTRONOMY AND ASTROPHYSICS
ACETONITRILE
ALCOHOLS
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CARBON MONOXIDE
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CHALCOGENIDES
EMISSION
HYDROXY COMPOUNDS
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MEASURING INSTRUMENTS
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ORGANIC NITROGEN COMPOUNDS
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