TY - JOUR AU - Zahorecz, Sarolta AU - Molnar, Daniel AU - Kraus, Alex AU - Onishi, Toshikazu TI - A double core in the Auriga-California Molecular Cloud JF - PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION J2 - PROC IAU VL - 14 PY - 2020 IS - S345 SP - 335 EP - 336 PG - 2 SN - 1743-9213 DO - 10.1017/S1743921319001753 UR - https://m2.mtmt.hu/api/publication/31134617 ID - 31134617 LA - English DB - MTMT ER - TY - JOUR AU - Zahorecz, Sarolta AU - Jimenez-Serra, Izaskun AU - Testi, Leonardo AU - Immer, Katharina AU - Fontani, Francesco AU - Caselli, Paola AU - Tóth, László Viktor AU - Wang, Ke AU - Onishi, Toshikazu TI - Deuteration of formaldehyde - an important precursor of hydrogenated complex organic molecules - during star formation in our Galaxy JF - PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION J2 - PROC IAU VL - 14 PY - 2020 IS - S345 SP - 337 EP - 338 PG - 2 SN - 1743-9213 DO - 10.1017/S1743921319001765 UR - https://m2.mtmt.hu/api/publication/31133300 ID - 31133300 LA - English DB - MTMT ER - TY - JOUR AU - Finn, M. K. AU - Indebetouw, R. AU - Johnson, K. E. AU - Costa, A. H. AU - Chen, C. AU - Onishi, T. AU - Ott, J. AU - Tokuda, K. AU - Wong, T. AU - Zahorecz, Sarolta TI - Physical Conditions in the LMC's Quiescent Molecular Ridge: Fitting Non-LTE Models to CO Emission JF - BULLETIN OF THE AMERICAN ASTRONOMICAL SOCIETY J2 - BULL AM ASTRON SOC VL - 52 PY - 2020 IS - 1 SP - 509 EP - 510 PG - 2 SN - 0002-7537 UR - https://m2.mtmt.hu/api/publication/31125851 ID - 31125851 LA - English DB - MTMT ER - TY - JOUR AU - Zahorecz, Sarolta AU - Onishi, Toshikazu AU - Muraoka, Kazuyuki AU - Homma, Aya AU - Harada, Ryohei AU - Takada, Shota AU - Maezawa, Hiroyuki AU - Tokuda, Kazuki AU - Saigo, Kazuya AU - Kawamura, Akiko AU - Mizuno, Norikazu AU - Minamidani, Tetsuhiro AU - Meixner, Margaret AU - Indebetouw, Remy AU - Sewilo, Marta AU - Fukui, Yasuo AU - Bolatto, Alberto TI - CO / CI observations of N83C in the early stage of star formation in SMC with ALMA JF - PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION J2 - PROC IAU VL - 14 PY - 2019 IS - S344 SP - 313 EP - 315 PG - 3 SN - 1743-9213 DO - 10.1017/S1743921318007706 UR - https://m2.mtmt.hu/api/publication/31126043 ID - 31126043 LA - English DB - MTMT ER - TY - JOUR AU - Wong, Tony AU - Hughes, Annie AU - Tokuda, Kazuki AU - Indebetouw, Rémy AU - Onishi, Toshikazu AU - Bandurski, Jeffrey B. AU - Chen, C.-H. Rosie AU - Fukui, Yasuo AU - Glover, Simon C. O. AU - Klessen, Ralf S. AU - Pineda, Jorge L. AU - Roman-Duval, Julia AU - Sewiło, Marta AU - Wojciechowski, Evan AU - Zahorecz, Sarolta TI - Relations between Molecular Cloud Structure Sizes and Line Widths in the Large Magellanic Cloud JF - ASTROPHYSICAL JOURNAL J2 - ASTROPHYS J VL - 885 PY - 2019 IS - 1 SP - 50 SN - 1538-4357 DO - 10.3847/1538-4357/ab46ba UR - https://m2.mtmt.hu/api/publication/31125937 ID - 31125937 LA - English DB - MTMT ER - TY - JOUR AU - Sewiło, Marta AU - Charnley, Steven B. AU - Schilke, Peter AU - Taquet, Vianney AU - Oliveira, Joana M. AU - Shimonishi, Takashi AU - Wirström, Eva AU - Indebetouw, Remy AU - Ward, Jacob L. AU - van Loon, Jacco Th. AU - Wiseman, Jennifer AU - Zahorecz, Sarolta AU - Onishi, Toshikazu AU - Kawamura, Akiko AU - Chen, C.-H. Rosie AU - Fukui, Yasuo AU - Hamedani Golshan, Roya TI - Complex Organic Molecules in Star-Forming Regions of the Magellanic Clouds JF - ACS EARTH AND SPACE CHEMISTRY J2 - ACS EARTH SPACE CHEM VL - 3 PY - 2019 IS - 10 SP - 2088 EP - 2109 PG - 22 SN - 2472-3452 DO - 10.1021/acsearthspacechem.9b00065 UR - https://m2.mtmt.hu/api/publication/31125825 ID - 31125825 LA - English DB - MTMT ER - TY - JOUR AU - Tokuda, Kazuki AU - Fukui, Yasuo AU - Harada, Ryohei AU - Saigo, Kazuya AU - Tachihara, Kengo AU - Tsuge, Kisetsu AU - Inoue, Tsuyoshi AU - Torii, Kazufumi AU - Nishimura, Atsushi AU - Zahorecz, Sarolta AU - Nayak, Omnarayani AU - Meixner, Margaret AU - Minamidani, Tetsuhiro AU - Kawamura, Akiko AU - Mizuno, Norikazu AU - Indebetouw, Remy AU - Sewilo, Marta AU - Madden, Suzanne AU - Galametz, Maud AU - Lebouteiller, Vianney AU - Chen, C. -H. Rosie AU - Onishi, Toshikazu TI - An ALMA View of Molecular Filaments in the Large Magellanic Cloud. II. An Early Stage of High-mass Star Formation Embedded at Colliding Clouds in N159W-South JF - ASTROPHYSICAL JOURNAL J2 - ASTROPHYS J VL - 886 PY - 2019 IS - 1 PG - 10 SN - 1538-4357 DO - 10.3847/1538-4357/ab48ff UR - https://m2.mtmt.hu/api/publication/31086974 ID - 31086974 AB - We have conducted ALMA CO isotopes and 1.3 mm continuum observations toward filamentary molecular clouds of the N159W-South region in the Large Magellanic Cloud with an angular resolution of ?025 (?0.07 pc). Although the previous lower-resolution (?1?) ALMA observations revealed that there is a high-mass protostellar object at an intersection of two line-shaped filaments in (CO)-C-13 with the length scale of ?10 pc, the spatially resolved observations, in particular, toward the highest column density part traced by the 1.3 mm continuum emission, the N159W-South clump, show complicated hub-filamentary structures. We also discovered that there are multiple protostellar sources with bipolar outflows along the massive filament. The redshifted/blueshifted components of the (CO)-C-13 emission around the massive filaments/protostars have complementary distributions, which is considered to be possible evidence for a cloud?cloud collision. We propose a new scenario in which the supersonically colliding gas flow triggers the formation of both the massive filament and protostars. This is a modification of the earlier scenario of cloud?cloud collision, by Fukui et al., that postulated the two filamentary clouds occur prior to the high-mass star formation. A recent theoretical study of the shock compression in colliding molecular flows by Inoue et al. demonstrates that the formation of filaments with hub structure is a usual outcome of the collision, lending support for the present scenario. The theory argues that the filaments are formed as dense parts in a shock compressed sheet-like layer, which resembles ?an umbrella with pokes.? LA - English DB - MTMT ER - TY - JOUR AU - Fukui, Yasuo AU - Tokuda, Kazuki AU - Saigo, Kazuya AU - Harada, Ryohei AU - Tachihara, Kengo AU - Tsuge, Kisetsu AU - Inoue, Tsuyoshi AU - Torii, Kazufumi AU - Nishimura, Atsushi AU - Zahorecz, Sarolta AU - Nayak, Omnarayani AU - Meixner, Margaret AU - Minamidani, Tetsuhiro AU - Kawamura, Akiko AU - Mizuno, Norikazu AU - Indebetouw, Remy AU - Sewilo, Marta AU - Madden, Suzanne AU - Galametz, Maud AU - Lebouteiller, Vianney AU - Chen, C. -H. Rosie AU - Onishi, Toshikazu TI - An ALMA View of Molecular Filaments in the Large Magellanic Cloud. I. The Formation of High-mass Stars and Pillars in the N159E-Papillon Nebula Triggered by a Cloud?Cloud Collision JF - ASTROPHYSICAL JOURNAL J2 - ASTROPHYS J VL - 886 PY - 2019 IS - 1 PG - 13 SN - 1538-4357 DO - 10.3847/1538-4357/ab4900 UR - https://m2.mtmt.hu/api/publication/31086868 ID - 31086868 N1 - Funding Agency and Grant Number: NAOJ ALMA Scientific Research grants [2016-03B]; JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [22244014, 23403001, 26247026, 18K13582, 18K13580, 18H05440]; NASANational Aeronautics & Space Administration (NASA) [80GSFC17M0002] Funding text: We thank Doris Arzoumanian and Shu-ichiro Inutsuka for discussions about the filamentary molecular clouds. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2012.1.00554.S, and #2016.1.01173.S. ALMA is a partnership of the ESO, NSF, NINS, NRC, NSC, and ASIAA. The Joint ALMA Observatory is operated by the ESO, AUI/NRAO, and NAOJ. This work was supported by NAOJ ALMA Scientific Research grants No. 2016-03B and JSPS KAKENHI (grants No. 22244014, 23403001, 26247026, 18K13582, 18K13580, and 18H05440). The work of M.S. was supported by NASA under award number 80GSFC17M0002. AB - We present ALMA observations of CO isotopes and 1.3 mm continuum emission toward the N159E-Papillon Nebula in the Large Magellanic Cloud (LMC). The spatial resolution is 025?028 (0.06?0.07 pc), which is a factor of 3 higher than previous ALMA observations in this region. The high resolution allowed us to resolve highly filamentary CO distributions with typical widths of ?0.1 pc (full width half maximum) and line masses of a few 100 M pc(?1). The filaments (more than ten in number) show an outstanding hub-filament structure emanating from the nebular center toward the north. We identified for the first time two massive protostellar outflows of ?10(4) yr dynamical age along one of the most massive filaments. The observations also revealed several pillar-like CO features around the Nebula. The H ii region and the pillars have a complementary spatial distribution and the column density of the pillars is an order of magnitude higher than that of the pillars in the Eagle nebula (M16) in the Galaxy, suggesting an early stage of pillar formation with an age younger than ?10(5) yr. We suggest that a cloud?cloud collision triggered the formation of the filaments and protostar within the last ?2 Myr. It is possible that the collision is more recent, as part of the kpc-scale H i flows come from the tidal interaction resulting from the close encounter between the LMC and SMC ?200 Myr ago as suggested for R136 by Fukui et al. LA - English DB - MTMT ER - TY - JOUR AU - Montillaud, Julien AU - Juvela, Mika AU - Vastel, Charlotte AU - He, Jinhua AU - Liu, Tie AU - Ristorcelli, Isabelle AU - Eden, David J. AU - Kang, Sung-ju AU - Kim, Kee-Tae AU - Koch, Patrick M. AU - Lee, Chang Won AU - Rawlings, Mark G. AU - Saajasto, Mika AU - Sanhueza, Patricio AU - Soam, Archana AU - Zahorecz, Sarolta AU - Alina, Dana AU - Bőgner, Rebeka AU - Cornu, David AU - Doi, Yasuo AU - Malinen, Johanna AU - Marshall, Douglas J. AU - Micelotta, Elisabetta R. AU - Pelkonen, Veli-Matti AU - Tóth, László Viktor AU - Traficante, Alessio AU - Wang, Ke TI - Multi-scale analysis of the Monoceros OB 1 star-forming region. II. Colliding filaments in the Monoceros OB1 molecular cloud JF - ASTRONOMY & ASTROPHYSICS J2 - ASTRON ASTROPHYS VL - 631 PY - 2019 SN - 0004-6361 DO - 10.1051/0004-6361/201834903 UR - https://m2.mtmt.hu/api/publication/30861488 ID - 30861488 N1 - eprint: arXiv:1909.06145; AB - Context. We started a multi-scale analysis of star formation in G202.3+2.5, an intertwined filamentary sub-region of the Monoceros OB molecular complex, in order to provide observational constraints o current theories and models that attempt to explain star formatio globally. In the first paper (Paper I), we examined the distributions o dense cores and protostars and found enhanced star formation activity i the junction region of the filaments. Aims: In this second paper we aim to unveil the connections between the core and filamen evolutions, and between the filament dynamics and the global evolutio of the cloud. Methods: We characterise the gas dynamics an energy balance in different parts of G202.3+2.5 using infrare observations from the Herschel and WISE telescopes and molecular tracer observed with the IRAM 30-m and TRAO 14-m telescopes. The velocity fiel of the cloud is examined and velocity-coherent structures ar identified, characterised, and put in perspective with the clou environment. Results: Two main velocity components are revealed, well separated in radial velocities in the north and merged around th location of intense N2H+ emission in the centre o G202.3+2.5 where Paper I found the peak of star formation activity. W show that the relative position of the two components along th sightline, and the velocity gradient of the N2H emission imply that the components have been undergoing collision fo 105 yr, although it remains unclear whether the gas move mainly along or across the filament axes. The dense gas wher N2H+ is detected is interpreted as the compresse region between the two filaments, which corresponds to a high mas inflow rate of 1 × 10-3 M☉ yr-1 an possibly leads to a significant increase in its star formatio efficiency. We identify a protostellar source in the junction regio that possibly powers two crossed intermittent outflows. We show that th H II region around the nearby cluster NCG 2264 is still expanding an its role in the collision is examined. However, we cannot rule out th idea that the collision arises mostly from the global collapse of th cloud. Conclusions: The (sub-)filament-scale observables examined in this paper reveal a collision between G202.3+2.5 sub-structures an its probable role in feeding the cores in the junction region. To she more light on this link between core and filament evolutions, one mus characterise the cloud morphology, its fragmentation, and magneti field, all at high resolution. We consider the role of the environmen in this paper, but a larger-scale study of this region is now necessar to investigate the scenario of a global cloud collapse. The reduce datacubes (FITS files) of our IRAM and TRAO observations are onl available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.f bin/cat/J/A+A/631/A3 LA - English DB - MTMT ER - TY - JOUR AU - Tokuda, K. AU - Tachihara, K. AU - Saigo, K. AU - André, P. AU - Miyamoto, Y. AU - Zahorecz, Sarolta AU - Inutsuka, S.-I. AU - Matsumoto, T. AU - Takashima, T. AU - Machida, M.N. AU - Tomida, K. AU - Taniguchi, K. AU - Fukui, Y. AU - Kawamura, A. AU - Tatematsu, K. AU - Kandori, R. AU - Onishi, T. TI - A centrally concentrated sub-solar-mass starless core in the Taurus L1495 filamentary complex JF - PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN J2 - PUBL ASTRON SOC JPN VL - 71 PY - 2019 IS - 4 SN - 0004-6264 DO - 10.1093/pasj/psz051 UR - https://m2.mtmt.hu/api/publication/30809095 ID - 30809095 N1 - Department of Physical Science, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan Chile Observatory, National Astronomical Observatory of Japan, National Institutes of Natural Science, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan Laboratoire d'Astrophysique (AIM), CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, Gif-sur-Yvette, 91191, France Faculty of Sustainability Studies, Hosei University, 2-17-1 Fujimi, Chiyoda-ku, Tokyo, 102-8160, Japan Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, Fukuoka, 819-0395, Japan Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan Departments of Astronomy and Chemistry, University of Virginia, Charlottesville, VA 22904, United States National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan Astrobiology Center of NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan Export Date: 19 September 2019 LA - English DB - MTMT ER -