我們使用SMA次毫米波干涉陣列觀測低質量原恆星雙星系統IRAS 16293-2422。在次角秒解析度下(0.9〃× 0.5〃)，可以解析出I16293A有三個明顯的連續積分強度位置，而I16293B仍是一個未解析的點源。多數含硫分子存在於天體I16293A，且光譜結構複雜，暗示含硫分子在天體I16293A附近有著複雜的氣體動力結構。在角秒解析度(3.3〃× 1.2〃)的觀測裡，包含基態與扭轉激發態的CH3OH分子，多數分子有明顯的藍移與紅移速度組成的光譜輪廓，從基態CH3OH分子所計算出的旋轉激發溫度為261 K(I16293A)和211 K(I16293B)。另一方面，C2H5OH分子與CH3CHO分子所得到的旋轉激發溫度分別為214 K(I16293A) 與313 K(I16293B)，暗示在低質量恆星形成區也存在高溫的分子形成環境與種類豐富的有機分子，也間接證實了低質量熱分子雲核hot corinos的存在。我們在I16293A與I16293B上分別觀測到C2H5OH及CH3CHO分子有不同的空間分布，顯示出這兩個天體有不同的演化時期。其他複雜的有機分子，所得的旋轉激發溫度都大於150 K，甚至在I16293B上的34SO2分子有350 K，表示無論在I16293A或I16293B上都有高溫的分子形成區域。另外比較彼此之間的豐度比例，發現有許多分子的豐度並無法與化學模型有一致結果，暗示低質量恆星形成區裡分子形成過程可能與高質量熱分子雲核在化學途徑演化上有著顯著的差異。

André, P., Ward-Thompson, D. & Barsony, M., 1993, Submillimeter Continuum Observations of Rho Ophiuchi A - The Candidate Protostar VLA 1623 and Prestellar Clumps, ApJ, 406, 122

Bates, D. R., & Spitzer, L. Jr., 1951, The Density of Molecules in Interstellar Space, ApJ, 113, 441

Bisschop, S. E., Fuchs, G. W., van Dishoeck, E. F. & Linnartz, H., 2007, H-atom Bombardment of CO2, HCOOH, and CH3CHO Containing Ices, A&A, 474, 1061

Bisschop, S. E., Jørgensen, J. K., Bourke, T. L., Bottinelli, S., & van Dishoeck, E. F., 2008, An Interferometric Study of the Low-Mass Protostar IRAS 16293-2422: Small Scale Organic Chemistry, A&A, 488, 959

Blake, G. A., van Dishoeck, E. F., Jansen, D. J., Groesbeck, T. D., & Mundy, L. G., 1994, Molecular Abundances and Low-Mass Star Formation. 1: Si- and S-bearing Species Toward IRAS 16293-2422, ApJ, 428, 680

Blundell, R., 2005, The Submillimeter Array Antennas and Receivers, Astro-ph, 8492

Bottinelli, S., Ceccarelli, C., Neri, R., Williams, J. P., Caux, E., Cazaux, S., Lefloch, B., Maret, S., & Tielens, A. G. G. M., 2004, Near-Arcsecond Resolution Observations of the Hot Corino of the Solar-Type Protostar IRAS 16293-2422, ApJ, 617, L69

Bottinelli, S., Ceccarelli, C., Williams, J. P. & Lefloch, B., 2007, Hot Corinos in NGC 1333-IRAS4B and IRAS2A, A&A, 463, 601

Burton, M. G., Lawrence, J. S., Ashley, M. C. B., Bailey, J. A., Blake, C., Bedding, T. R., Bland-Hawthorn, J., Bond, I. A., Glazebrook, K., Hidas, M. G., Lewis, G., Longmore, S. N., Maddison, S. T., Mattila, S., Minier, V., Ryder, S. D., Sharp, R., Smith, C. H., Storey, J. W. V., Tinney, C. G., Tuthill, P., Walsh, A. J., Walsh, W., Whiting, M., Wong, T., Woods, D., & Yock, P. C. M., 2005, Science Programs for a 2-m Class Telescope at Dome C, Antarctica: PILOT, the Pathfinder for an International Large Optical Telescope, PASA, 22, 199

Caselli, P.; Hasegawa, T. I.; Herbst, E., 1993, Chemical Differentiation between Star-Forming Regions - The Orion Hot Core and Compact Ridge, ApJ, 408, 458

Cazaux, S., Tielens, A. G. G. M., Ceccarelli, C., Castets, A., Wakelam, V., Caux, E., Parise, B., & Teyssier, D., 2003, The Hot Core Around the Low-mass Protostar IRAS 16293-2422: Scoundrels Rule!, ApJ, 593, 51

Chandler, C. J., Brogan, C. L., Shirley, Y. L., & Loinard, L., 2005, IRAS 16293-2422: Proper Motions, Jet Precession, the Hot Core, and the Unambiguous Detection of Infall, ApJ, 632, 371

Charnley, S. B., Tielens, A. G. G. M., & Millar, T. J., 1992, On the Molecular Complexity of the Hot Cores in Orion A - Grain Surface Chemistry as 'The Last Refuge of the Scoundrel', ApJ, 399, L71

Charnley, S. B., Kress, M. E., Tielens, A. G. G. M. & Millar, T. J., 1995, Interstellar Alcohols, ApJ, 448, 232

Charnley, S. B., 2004, Acetaldehyde in Star-Forming Regions, AdSpR, 33, 23

Cummins, S. E., Green, S., Thaddeus, P. & Linke, R. A., 1983, The Kinetic Temperature and Density of the Sagittarius B2 Molecular Cloud from Observations of Methyl Cyanide, ApJ, 266, 331

Doty, S. D., Schöier, F. L., & van Dishoeck, E. F., 2004, Physical-Chemical Modeling of the Low-Mass Protostar IRAS 16293-2422, A&A, 418, 1021

Garrod, R. T. & Herbst, E., 2006, Formation of Methyl Formate and Other Organic Species in the Warm-up Phase of Hot Molecular Cores, A&A, 457, 927

Garrod, R. T., Weaver, S. L. W. & Herbst, E., 2008, Complex Chemistry in Star-forming Regions: An Expanded Gas-Grain Warm-up Chemical Model, ApJ, 682, 283

Green, T., 2001, Protostars, Am. Sci., 89, 316

Herbst, E., 1990, The Chemistry of Interstellar Space, AngCh, 29, 595

Hirano, N., Mikami, H., Umemoto, T., Yamamoto, S., & Taniguchi, Y., 2001, SiO Emission in the Multilobe Outflow Associated with IRAS 16293-2422, ApJ, 547, 899

Ho, P. T. P., Moran, J. M., & Lo, K. Y., 2004, The Submillimeter Array, ApJ, 616, 1

Huang, H. C., Kuan, Y. J., Charnley, S. B., Hirano, N., Takakuwa, S., Bourke, T. L., 2005, Organic Molecules in the Hot Corinos and Circumstellar Disks of IRAS 16293-2422, AdSpR, 36, 146

Huang, H. C., 2009, National Taiwan Normal University, doctor’s degree thesis

Kuan, Y. J., Huang, H. C., Charnley, S. B., Hirano, N., Takakuwa, S., Wilner, D. J., Liu, S. Y., Ohashi, N., Bourke, T. L., Qi, C., & Zhang, Q., 2004, Organic Molecules in Low-Mass Protostellar Hot Cores: Submillimeter Imaging of IRAS 16293-2422, ApJ, 616, L27

Lada, C. J., & Shu, F. H., 1990, The Formation of Sunlike Stars, Sci., 248, 564

Liu, S. Y., Mehringer, D. M. & Snyder, L. E., 2001, Observations of Formic Acid in Hot Molecular Cores, ApJ, 552, 654

Loinard, L., 2002, Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422, RMxAA, 38, 61

Loinard, L., Castets, A., Ceccarelli, C., Lefloch, B., Benayoun, J. -J., Caux, E., Vastel, C., Dartois, E., & Tielens, A. G. G. M., 2002, Doubly Deuterated Formaldehyde in Star-Forming Regions: An Observational Approach, P&SS, 552, L163

Loinard, L., Chandler, C. J., Brogan, C. L., & Wilner, D. J., & Ho, P. T. P., 2007, New Radio Sources and the Composite Structure of Component B in the Very Young Protostellar System IRAS 16293-2422, ApJ, 670, 1353

Looney, L. W., Mundy, L. G., & Welch, W. J., 2000, Unveiling the Circumstellar Envelope and Disk: A Subarcsecond Survey of Circumstellar Structures, ApJ, 529,477

Mehringer, D. M., Snyder, L. E., Miao, Y., & Lovas F. J., 1997, Detection and Confirmation of Interstellar Acetic Acid, ApJ, 480, 71

Mizuno, A., Fukui, Y., Iwata, T., Nozawa, S., & Takano, T., 1990, A Remarkable Multilobe Molecular Outflow - Rho Ophiuchi East, Associated with IRAS 16293-2422, ApJ, 356, 184

Narayanan, G., Walker, C. K.; & Buckley, H. D., 1998, The 〝Blue-Bulge'' Infall Signature Toward IRAS 16293-2422, ApJ, 496, 292

Nummelin, A., Bergman, P., Hjalmarson, Å., Friberg, P., Irvine, W. M., Millar, T. J., Ohishi, M. & Saito, S., 2000, A Three-Position Spectral Line Survey of Sagittarius B2 between 218 and 263 GHZ. II. Data Analysis, ApJS, 128, 213

Prasad, S. S., & Huntress, W. T., Jr., 1980, A Model for Gas Phase Chemistry in Interstellar Clouds. II - Nonequilibrium Effects and Effects of Temperature and Activation Energies, ApJ, 239, 151

Remijan, A. J., & Hollis, J. M., 2006, IRAS 16293-2422: Evidence for Infall onto a Counterrotating Protostellar Accretion Disk, ApJ, 640, 842

Schöier, F. L., Jørgensen, J. K., van Dishoeck, E. F., & Blake, G. A., 2002, Does IRAS 16293-2422 have a Hot Core? Chemical Inventory and Abundance Changes in Its Protostellar Environment, A&A, 390, 1001

Shiao, Y.-S. J., Looney, L. W., Remijan, A. J., Snyder, L. E. & Friedel, D. N., 2010, First Acetic Acid Survey with CARMA in Hot Molecular Cores, ApJ, 716, 286

Stark, R., Sandell, G., Beck, S. C., Hogerheijde, M. R., van Dishoeck, E. F., van der Wal, P., van der Tak, Floris F. S., Schäfer, F., Melnick, G. J., Ashby, M. L. N., & de Lange, G., 2004, Probing the Early Stages of Low-Mass Star Formation in LDN 1689N: Dust and Water in IRAS 16293-2422A, B, and E, ApJ, 608, 341

Sutton, E. C., Jaminet, P. A., Danchi, W. C. & Blake, G. A., 1991, Molecular Line Survey of Sagittarius B2(M) from 330 to 355 GHz and Comparison with Sagittarius B2(N), ApJ, 77, 255

Sutton, E. C., Peng, R., Danchi, W. C., Jaminet, P. A., Sandell, G. & Russell, A. P. G., 1995, The Distribution of Molecules in the Core of OMC-1, ApJS, 97, 455

Tielens, A. G. G. M. & Charnley, S. B., 1997, Circumstellar and Interstellar Synthesis of Organic Molecules, OLEB, 27, 23

Turner, B. E., 1991, A Molecular Line Survey of Sagittarius B2 and Orion-KL from 70 to 115 GHz. II - Analysis of the Data, ApJ, 76, 617

van Dishoeck, E. F., Blake, G. A., Jansen, D. J., & Groesbeck, T. D., 1995, Molecular Abundances and Low-Mass Star Formation. II. Organic and Deuterated Species Toward IRAS 16293-2422, ApJ, 447, 760

Wakelam, V., Caselli, P., Ceccarelli, C., Herbst, E., & Castets, A., 2004, Resetting Chemical Clocks of Hot Cores Based on S-Bearing Molecules, A&A, 422, 159

Walker, C. K., Lada, C. J., Young, E. T., Margulis, M., 1988, An Unusual Outflow Around IRAS 16293-2422, ApJ, 332, 335

Wootten, A., 1989, The Duplicity of IRAS 16293-2422: A Protobinary Star ?, ApJ, 337, 858

Zuckerman, B., Ball, J. A. & Gottlieb, C. A., 1971, Microwave Detection of Interstellar Formic Acid, ApJ, 163, 41