A 1.3 mm SMA survey of 29 variable young stellar objects
Por:
Liu H.B., Dunham M.M., Pascucci I., Bourke T.L., Hirano N., Longmore S., Andrews S., Carrasco-González C., Forbrich J., Galván-Madrid R., Girart J.M., Green, Joel D., Juarez, Carmen, Kospal, Agnes, Manara, Carlo F., Palau, Aina, Takami, Michihiro, Testi, Leonardo, Vorobyov, I, Eduard
Publicada:
20 abr 2018
Resumen:
Context. Young stellar objects (YSOs) may undergo periods of active accretion (outbursts), during which the protostellar accretion rate is temporarily enhanced by a few orders of magnitude. Whether or not these accretion outburst YSOs possess similar dust and gas reservoirs to each other, and whether or not their dust and gas reservoirs are similar as quiescent YSOs, are issues yet to be clarified.Aims. The aim of this work is to characterize the millimeter thermal dust emission properties of a statistically significant sample of long and short duration accretion outburst YSOs (i.e., FUors and EXors) and the spectroscopically identified candidates of accretion outbursting YSOs (i.e., FUor-like objects). Methods. We have carried out extensive Submillimeter Array (SMA) observations mostly at ~225 GHz (1.33 mm) and ~272 GHz (1.10 mm), from 2008 to 2017. We covered accretion outburst YSOs located at <1 kpc distances from the solar system. Results. We analyze all the existing SMA data of such objects, both published and unpublished, in a coherent way to present a millimeter interferometric database of 29 objects. We obtained 21 detections at >3σ significance. Detected sources except for the two cases of V883 Ori and NGC 2071 MM3 were observed with ~1″ angular resolution. Overall our observed targets show a systematically higher millimeter luminosity distribution than those of the M∗ > 0.3 MClass II YSOs in the nearby (400 pc) low-mass star-forming molecular clouds (e.g., Taurus, Lupus, Upp Scorpio, and Chameleon I). In addition, at 1 mm our observed confirmed binaries or triple-system sources are systematically fainter than the rest of the sources even though their 1 mm fluxes are broadly distributed. We may have detected ∼30-60% millimeter flux variability from V2494 Cyg and V2495 Cyg, from the observations separated by approximately one year. © ESO 2018.
Filiaciones:
Liu H.B.:
ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, Garching, 85748, Germany
Dunham M.M.:
SUNY Coll Fredonia, Dept Phys, 280 Cent Ave, Fredonia, NY 14063 USA
Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
Department of Physics, State University of New York at Fredonia, 280 Central Ave, Fredonia, NY 14063, United States
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States
Pascucci I.:
Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, United States
Bourke T.L.:
SKA Org, Jodrell Bank Observ, Lower Withington SK11 9DL, Macclesfield, England
SKA Organisation, Jodrell Bank Observatory, Lower Withington, Macclesfield, SK11 9DL, United Kingdom
Hirano N.:
Natl Taiwan Univ, Inst Astron & Astrophys, Acad Sinica, 11F Astron Math Bldg,1 Sec,Roosevelt Rd, Taipei 10617, Taiwan
Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, National Taiwan University, No 1, Sec., Roosevelt Road, Taipei, 10617, Taiwan
Longmore S.:
Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool, L3 5RF, United Kingdom
Andrews S.:
Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States
Carrasco-González C.:
UNAM, Inst Radioastron & Astrofis, AP 3-72, Morelia 58089, Michoacan, Mexico
Instituto de Radioastronomía y Astrofísica, UNAM, A.P. 3-72, Xangari, Morelia, 58089, Mexico
Forbrich J.:
Univ Hertfordshire, Ctr Astrophys Res, Sch Phys Astron & Math, Coll Lane, Hatfield AL10 9AB, Herts, England
Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, United Kingdom
Galván-Madrid R.:
UNAM, Inst Radioastron & Astrofis, AP 3-72, Morelia 58089, Michoacan, Mexico
Instituto de Radioastronomía y Astrofísica, UNAM, A.P. 3-72, Xangari, Morelia, 58089, Mexico
Girart J.M.:
CSIC, IEEC, Inst Ciencies Espai, Can Magrans S-N, Cerdanyola Del Valles 08193, Catalonia, Spain
Institut de Ciències de l´Espai (IEEC-CSIC), Can Magrans, S/N, 08193 Cerdanyola del Vallés, Catalonia, Spain
Green, Joel D.:
Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
Space Telescope Science Institute, Baltimore, MD 21218, United States
Juarez, Carmen:
CSIC, IEEC, Inst Ciencies Espai, Can Magrans S-N, Cerdanyola Del Valles 08193, Catalonia, Spain
Institut de Ciències de l´Espai (IEEC-CSIC), Can Magrans, S/N, 08193 Cerdanyola del Vallés, Catalonia, Spain
Kospal, Agnes:
Hungarian Acad Sci, Konkoly Observ, Res Ctr Astron & Earth Sci, Konkoly Thege Miklosut 15-17, H-1121 Budapest, Hungary
Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Hungarian Academy of Science, Konkoly-Thege Miklósút 15-17, Budapest, 1121, Hungary
Max-Planck-Institut för Astronomie, Königstuhl 17, Heidelberg, 69117, Germany
Manara, Carlo F.:
ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, Garching, 85748, Germany
Palau, Aina:
UNAM, Inst Radioastron & Astrofis, AP 3-72, Morelia 58089, Michoacan, Mexico
Instituto de Radioastronomía y Astrofísica, UNAM, A.P. 3-72, Xangari, Morelia, 58089, Mexico
Takami, Michihiro:
Natl Taiwan Univ, Inst Astron & Astrophys, Acad Sinica, 11F Astron Math Bldg,1 Sec,Roosevelt Rd, Taipei 10617, Taiwan
Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, National Taiwan University, No 1, Sec., Roosevelt Road, Taipei, 10617, Taiwan
Testi, Leonardo:
ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, Garching, 85748, Germany
Vorobyov, I, Eduard:
Institute of Fluid Mechanics and Heat Transfer, TU Wien, Vienna, 1060, Austria
Department of Astrophysics, University of Vienna, Vienna, 1180, Austria
Research Institute of Physics, Southern Federal University, Rostov-on-Don, 344090, Russian Federation
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