J-GLOBAL         Last updated: Jul 6, 2018 at 22:11
Y. Shimajiri
National Institutes of Natural Sciences
National Astronomical Observatory of JapanNobeyama Radio Observatory

Research Interests


Research Areas


Published Papers

Jesse R. Feddersen, Héctor G. Arce, Shuo Kong, Yoshito Shimajiri, Fumitaka Nakamura, Chihomi Hara, Shun Ishii, Kazushige Sasaki, Ryohei Kawabe
   Jun 2018
We present the discovery of expanding spherical shells around low to
intermediate-mass young stars in the Orion A giant molecular cloud using
observations of TexCO (1-0) and TexCO (1-0) from the Nobeyama Radio
Observatory 45-meter telescop...
Shuo Kong, Héctor G. Arce, Jesse R. Feddersen, John M. Carpenter, Fumitaka Nakamura, Yoshito Shimajiri, Andrea Isella, Volker Ossenkopf-Okada, Anneila I. Sargent, Álvaro Sánchez-Monge, Sümeyye T. Suri, Jens Kauffmann, Thushara Pillai, Jaime E. Pineda, Jin Koda, John Bally, Dariusz C. Lis, Paolo Padoan, Ralf Klessen, Steve Mairs, Alyssa Goodman, Paul Goldsmith, Peregrine McGehee, Peter Schilke, Peter J. Teuben, María José Maureira, Chihomi Hara, Adam Ginsburg, Blakesley Burkhart, Rowan J. Smith, Anika Schmiedeke, Jorge L. Pineda, Shun Ishii, Kazushige Sasaki, Ryohei Kawabe, Yumiko Urasawa, Shuri Oyamada, Yoshihiro Tanabe
   Mar 2018
We present the first results from a new, high resolution, TexCO(1-0),
TexCO(1-0), and CTexO(1-0) molecular line survey of the Orion A cloud,
hereafter referred to as the CARMA-NRO Orion Survey. CARMA observations have
been combined wit...
Nobeyama 45m Cygnus-X CO survey I: photodissociation of molecules revealed by the unbiased large-scale CN and CTexO maps
Yamagishi M., Nishimura A., Fujita S., Takekoshi T., Matsuo M., Minamidani T., Taniguchi K., Tokuda K., Shimajiri Y.
The Astrophysical Journal Supplement Series   235    Mar 2018   [Refereed]
Y. Shimajiri, Ph. André, J. Braine, V. Könyves, N. Schneider, S. Bontemps, B. Ladjelate, A. Roy, Y. Gao, H. Chen
Astronomy & Astrophysics   604    Aug 2017   [Refereed]
Recent studies have suggested that star formation (SF) in dense gas may be
governed by essentially the same law in Galactic clouds and external galaxies.
This conclusion remains controversial, however, because different tracers have
been used to p...
Yasuo Fukui, Kazufumi Torii, Yusuke Hattori, Atsushi Nishimura, Akio Ohama, Yoshito Shimajiri, Kazuhiro Shima, Asao Habe, Hidetoshi Sano, Mikito Kohno, Hiroaki Yamamoto, Kengo Tachihara, Toshikazu Onishi
   Jan 2017
The Orion Nebula Cluster toward the HII region M42 is the most outstanding
young cluster at the smallest distance 410pc among the rich high-mass stellar
clusters. By newly analyzing the archival molecular data of the 12CO(J=1-0)
emission at 21" re...
J. Braine, Y. Shimajiri, P. André, S. Bontemps, Yu Gao, Hao Chen, C. Kramer
Astronomy and Astrophysics   597    Jan 2017   [Refereed]
Stars form out of the densest parts of molecular clouds. Far-IR emission can
be used to estimate the Star Formation Rate (SFR) and high dipole moment
molecules, typically HCN, trace the dense gas. A strong correlation exists
between HCN and Far-IR...
Pei-Ying Hsieh, Paul T. P. Ho, Chorng-Yuan Hwang, Yoshito Shimajiri, Satoki Matsushita, Patrick M. Koch, Daisuke Iono
Astrophysical Journal   831(1)    Jul 2016   [Refereed]
We report a new 1-pc (30") resolution CS(Tex) line map of the central 30
pc of the Galactic Center (GC), made with the Nobeyama 45m telescope. We
revisit our previous study of the extraplanar feature called polar arc (PA),
which is a molecular...
Ph. André, V. Revéret, V. Könyves, D. Arzoumanian, J. Tigé, P. Gallais, H. Roussel, J. Le Pennec, L. Rodriguez, E. Doumayrou, D. Dubreuil, M. Lortholary, J. Martignac, M. Talvard, C. Delisle, F. Visticot, L. Dumaye, C. De Breuck, Y. Shimajiri, F. Motte, S. Bontemps, M. Hennemann, A. Zavagno, D. Russeil, N. Schneider, P. Palmeirim, N. Peretto, T. Hill, V. Minier, A. Roy, K. L. J. Rygl
-yoshito   May 2016   [Refereed]
Herschel observations of nearby molecular clouds suggest that interstellar
filaments and prestellar cores represent two fundamental steps in the star
formation process. The observations support a picture of low-mass star
formation according to whi...
Sheng-Jun Lin, Yoshito Shimajiri, Chihomi Hara, Shih-Ping Lai, Fumitaka Nakamura, Koji Sugitani, Ryohei Kawabe, Yoshimi Kitamura, Atsushi Yoshida, Hidefumi Tatei, Toshiya Akashi, Aya E. Higuchi, Takashi Tsukagoshi
-yoshito   May 2016   [Refereed]
L1551 is chosen because it is relatively isolated in the Taurus molecular
cloud shielded from FUV photons, providing an ideal environment for studying
the target properties. Our observations cover ~40'x40' with resolution ~30",
which are the maps ...
Shuo Kong, Jonathan C. Tan, Paola Caselli, Francesco Fontani, Thushara Pillai, Michael J. Butler, Yoshito Shimajiri, Fumitaka Nakamura, Takeshi Sakai
The Astrophysical Journal   821(2) 23   Apr 2016   [Refereed]
We study deuterium fractionation in two massive starless/early-stage cores
C1-N and C1-S in Infrared Dark Cloud (IRDC) G028.37+00.07, first identified by
Tan et al. (2013) with ALMA. Line emission from multiple transitions of Tex and $\rm...
Nakamura F., Tanaka T., Awazu Y., Shimajiri Y., et al. (他24名)
Revolution in Astronomy with ALMA: The Third Year   499 239-308   Dec 2015
Serpens South is a nearby infrared dark cloud (IRDC), consisting of several filamentary ridges, some of which fragment into dense clumps. On the basis of CCS (JN=43 -32) observations, we investigated the kinematics and chemical evolution of these ...
V. Konyves, Ph. Andre, A. Men'shchikov, P. Palmeirim, D. Arzoumanian, N. Schneider, A. Roy, P. Didelon, A. Maury, Y. Shimajiri, et al. (他21名)
Astronomy & Astrophysics   584(A91) 33-308   Dec 2015   [Refereed]
We present and discuss the results of the Herschel Gould Belt survey
observations in a ~11 deg^2 area of the Aquila molecular cloud complex at d~260
pc, imaged with the SPIRE/PACS cameras from 70 to 500 micron. We identify a
complete sample of sta...
A. Roy, Ph. Andre, D. Arzoumanian, et al. (他17名中14番目)
Astronomy & Astrophysics   584(A111) 10-308   Dec 2015   [Refereed]
Two major features of the prestellar CMF are: 1) a broad peak below 1 Msun,
presumably corresponding to a mean gravitational fragmentation scale, and 2) a
characteristic power-law slope, very similar to the Salpeter slope of the
stellar initial ma...
Y. Shimajiri, T. Sakai, Y. Kitamura, T. Tsukagoshi, M. Saito, F. Nakamura, M. Momose, S. Takakuwa, T. Yamaguchi, N. Sakai, S. Yamamoto, and R. Kawabe
The Astrophysical Journal Supplement Series   221(2) 31-308   Dec 2015   [Refereed]
We performed the first spectral-line survey at 82--106 GHz and 335--355 GHz
toward the outflow-shocked region, OMC 2-FIR 4, the outflow driving source, FIR
3, and the northern outflow lobe, FIR 3N. We detected 120 lines of 20 molecular
species. Th...
Y. Tamura, R. Kawabe, Y. Shimajiri, et al. (他24名)
The Astrophysical Journal   808(2) 14-308   Aug 2015   [Refereed]
We report detections of two candidate distant submillimeter galaxies (SMGs),
MM J154506.4Tex344318 and MM J154132.7Tex350320, which are discovered in the
AzTEC/ASTE 1.1 mm survey toward the Lupus-I star-forming region. The two
objects have 1.1 mm ...
Tomomi Shimoikura, Kazuhito Dobashi, Fumitaka Nakamura, Chihomi Hara, Tomohiro Tanaka, Yoshito Shimajiri, Kouji Sugitani
The Astrophysical Journal   806(2) 19   Jun 2015   [Refereed]
We report results of the CO(J=3-2) and HCO+(J=4-3) observations of the W40
HII region with the ASTE 10 m telescope (HPBW~22 arcsec) to search for
molecular outflows and dense clumps.We found that the velocity field in the
region is highly complex,...
Takashi Tsukagoshi, Munetake Momose, Masao Saito, Yoshimi Kitamura, Yoshito Shimajiri, Ryohei Kawabe
The Astrophysical Journal Letters   802(1) 6   Mar 2015   [Refereed]
We performed single point [C I] TexPTex-TexPTex and CO J=4-3 observations
toward three T Tauri stars, DM Tau, LkCa 15, and TW Hya, using the Atacama
Large Millimeter/submillimeter Array (ALMA) Band 8 qualification model receiver
installed on t...
Y. Shimajiri, Y. Kitamura, F. Nakamura, M. Momose, M. Saito, T. Tsukagoshi, M. Hiramatsu, T. Shimoikura, K. Dobashi, C. Hara, R. Kawabe
The Astrophysical Journal Supplement Series   217(1) 28-308   Mar 2015   [Refereed]
We present Orion A giant molecular cloud core catalogs, which are based on
1.1 mm map with an angular resolution of 36 arcsec (sim 0.07 pc) and C18O (1-0)
data with an angular resolution of 26.4 arcsec (sim 0.05 pc). We have cataloged
619 dust cor...
Chitsazzadeh S., Di Francesco J., Schnee S., Friesen R. K., Shimajiri Y., et al. (他7名)
The Astrophysical Journal   790(2) 129-308   Aug 2014   [Refereed]
Fumitaka Nakamura, Koji Sugitani, Tomohiro Tanaka, Hiroyuki Nishitani, Kazuhito Dobashi, Tomomi Shimoikura, Yoshito Shimajiri, et al. (他18名)
The Astrophysical Journal Letters   791(2) L23-308   Aug 2014   [Refereed]
The Serpens South infrared dark cloud consists of several filamentary ridges,
some of which fragment into dense clumps. On the basis of CCS (Tex),
HCTexN (Tex), NTexHTex (Tex), and SiO (Tex) observations,
we investiga...
Y. Shimajiri, Y. Kitamura, M. Saito, M. Momose, F. Nakamura, K. Dobashi, T. Shimoikura, H. Nishitani, A. Yamabi, C. Hara, S. Katakura, T. Tsukagoshi, T. Tanaka, and R. Kawabe
Astronomy & Astrophysics   564A(68) -308   Mar 2014   [Refereed]
Aims. We derive physical properties such as the optical depths and the column
densities of TexCO and CTexO to investigate the relationship between
the far ultraviolet (FUV) radiation and the abundance ratios between TexCO
and CTexO...
J. Malinen, M. Juvela, S. Zahorecz, et al. (他16名中12番目)
Astronomy & Astrophysics   563A(125) -308   Feb 2014   [Refereed]
L1642 is one of the two high galactic latitude (|b| > 30deg) clouds confirmed
to have active star formation. We examine the properties of this cloud,
especially the large-scale structure, dust properties, and compact sources in
different stages of...
Chitsazzadeh S., Di Francesco J., Bourke T., Friesen R., Langston G., Pineda J., Schnee S., Shimajiri Y., Takakuwa S., Tatematsu K., and Tobin J.
New Trends in Radio Astronomy in the ALMA Era: The 30th Anniversary of Nobeyama Radio Observatory   379-308   Oct 2013
Hara C., Kawabe R., Shimajiri Y., Ueda J., Kurono Y., Tsukagoshi T., Nakamura F., Saito M., and Wilner D.
ew Trends in Radio Astronomy in the ALMA Era: The 30th Anniversary of Nobeyama Radio Observatory   373-308   Oct 2013
We present the results of our Submillimeter Array (SMA) observations toward a Class-0/I protostar, [BHB2007]#11 (hereafter, B59#11) at the nearby starforming region, Barnard 59 (B59) in the Pipe Nebula (d ˜ 130 pc ; Lombardi et al. 2006) with ˜1″ ...
Tanaka, T., Awazu, Y., Nakamura, F., Sugitani, K., Shimajiri, Y., Kawabe, R., Ohnishi, T., and Yoshida, H.
New Trends in Radio Astronomy in the ALMA Era: The 30th Anniversary of Nobeyama Radio Observatory.   363-308   Oct 2013
We present the results of N2H+ (J=1-0) observations toward the nearest filamentary infrared dark cloud, Serpens South, using the NRO 45m telescope. From the N2H+ data, we derive the spatial distributions of the physical quantities such as the velo...
Tomohiro Tanaka, Fumitaka Nakamura, Yuya Awazu, Yoshito Shimajiri, Koji Sugitani, Toshikazu Onishi, Ryohei Kawabe, Hiroshige Yoshida, Aya E. Higuchi
The Astrophysical Journal   778(34) -308   Sep 2013   [Refereed]
We present the results of NTexHTex (Tex) observations toward Serpens
South, the nearest cluster-forming, infrared dark cloud. The physical
quantities are derived by fitting the hyperfine structure of NTexHTex. The
Herschel and 1.1-mm conti...
Yoshito Shimajiri, Takeshi Sakai, Takashi Tsukagoshi, Yoshimi Kitamura, Munetake Momose, Masao Saito, Tai Oshima, Kotaro Kohno, Ryohei Kawabe
The Astrophysical Journal Letters   774 L20   Aug 2013   [Refereed]
We have carried out wide-field (0.17 degree^2) and high-angular resolution
(21.3 arcsec ~ 0.04 pc) observations in [CI] line toward the Orion-A giant
molecular cloud with the Atacama Submillimeter Telescope Experiment (ASTE) 10 m
telescope in the ...
A. Lopez-Sepulcre, V. Taquet, A. Sanchez-Monge, C. Ceccarelli, C. Dominik, M. Kama, E. Caux, F. Fontani, A. Fuente, P. T. P. Ho, R. Neri, Y. Shimajiri
Astronomy & Astrophysics   556 A62-308   Aug 2013   [Refereed]
OMC-2 FIR 4 is one of the closest known young intermediate-mass
protoclusters, located at a distance of 420 pc in Orion. This region is one of
the few where the complete 500-2000 GHz spectrum has been observed with the
heterodyne spectrometer HIFI...
C. Hara, Y. Shimajiri, T. Tsukagoshi, Y. Kurono, K. Saigo, F. Nakamura, M. Saito, D. Wilner, R. Kawabe
The Astrophysical Journal   771(2) 128-308   May 2013   [Refereed]
We present the results of observations toward a low-mass Class-0/I protostar,
[BHB2007]#11 (afterwards B59#11) at the nearby (d=130 pc) star forming region,
Barnard 59 (B59) in the Pipe Nebula with the Atacama Submillimeter Telescope
Experiment (A...
F. Nakamura, T. Miura, Y. Kitamura, Y. Shimajiri, R. Kawabe, N. Ikeda, T. Tsukagoshi, M. Momose, R. Nishi, Zhi-Yun Li
The Astrophysical Journal   746(1) 25-308   Feb 2012   [Refereed]
We present high spatial resolution TexCO (Tex) images taken by the
Nobeyama 45m telescope toward a Tex area including the L1641-N
cluster. The effective spatial resolution of the maps is Tex, corresponding
to 0.04 pc at a di...
Shimajiri, Y., Kawabe, R., Takakuwa, et al. (他17名)
EAS Publications Series   52 307-308   Nov 2011
We present new, wide, and deep images in the AzTEC/ASTE 1.1 mm continuum and the 12 CO (J = 1-0) emission toward the northern part of the Orion-A GMC. We have found evidence for interactions between molecular clouds and the external forces that ma...
Fumitaka Nakamura, Koji Sugitani, Yoshito Shimajiri, et al. (他8名)
The Astrophysical Journal   737(2) 56-308   Aug 2011   [Refereed]
We present the results of CO (Tex) and HCOTex (Tex) mapping
observations toward a nearby embedded cluster, Serpens South, using the ASTE 10
m telescope. Our CO (Tex) map reveals that many outflows are crowded in the
dense cluster-form...
Yoshito Shimajiri, Ryohei Kawabe, Shigehisa Takakuwa, et al. (他17名)
Publications of the Astronomical Society of Japan   63(1) 1025-123   Feb 2011   [Refereed]
We present new, wide and deep images in the 1.1 mm continuum and the
TexCO (Tex=1-0) emission toward the northern part of the Orion A Giant
Molecular Cloud (Orion-A GMC). The 1.1 mm data were taken with the AzTEC camera
mounted on the Atacama ...
Takashi Tsukagoshi, Masao Saito, Yoshimi Kitamura, Munetake Momose, Yoshito Shimajiri, et al. (他14名)
The Astrophysical Journal   726(1) 45-308   Jan 2011   [Refereed]
We present the discovery of a cold massive dust disk around the T Tauri star
V1094 Sco in the Lupus molecular cloud from the 1.1 millimeter continuum
observations with AzTEC on ASTE. A compact (Tex320 AU) continuum
emission coincides with ...
Fumitaka Nakamura, Yuhei Kamada, Takeshi Kamazaki, Ryohei Kawabe, Yoshimi Kitamura, Yoshito Shimajiri, et al. (他10名)
The Astrophysical Journal   726(1) 46-308   Jan 2011   [Refereed]
We present the results of CO (J=3-2) and CO (J=1-0) mapping observations
toward the active cluster forming clump, L1688, in the rho Ophiuchi molecular
cloud. From the CO (J=3-2) and CO (J=1-0) data cubes, we identify five
outflows, whose driving s...
Yoshida, Atsushi; Kitamura, Yoshimi; Shimajiri, Yoshito; Kawabe, Ryohei
The Astrophysical Journal   718(2) 1019-1035   Aug 2010   [Refereed]
R. K. Friesen, J. Di Francesco, Y. Shimajiri, S. Takakuwa
The Astrophysical Journal   708(2) 1002-1024   Jan 2010   [Refereed]
We present a Nobeyama 45 m Radio Telescope map and Australia Telescope
Compact Array pointed observations of N2H+ 1-0 emission towards the clustered,
low mass star forming Oph B Core within the Ophiuchus molecular cloud. We
compare these data with...
Yoshito Shimajiri, Satoko Takahashi, Shigehisa Takakuwa, Masao Saito, Ryohei Kawabe
Publications of the Astronomical Society of Japan   61(5) 1055-1063   Oct 2009   [Refereed]
We have conducted millimeter interferometric observations of the Orion
Molecular Cloud-2 (OMC-2) FIR 6 region at an angular resolution of Tex
4Tex - 7Tex with the Nobeyama Millimeter Array (NMA). In the 3.3 mm
continuum emission we ...
Hiromi Seta, Naoki Isobe, Makoto S. Tashiro, Yuichi Yaji, Akira Arai, Masayuki Fukuhara, Kotaro Kohno, Koichiro Nakanishi, Mahito Sasada, Yoshito Shimajiri, Tomoka Tosaki, Makoto Uemura, MAGIC collaboration
Publications of the Astronomical Society of Japan   61(5) 1011-1022   Oct 2009   [Refereed]
Suzaku observations of the blazar OJ 287 were performed in 2007 April 10--13
and November 7--9. They correspond to a quiescent and a flaring state,
respectively. The X-ray spectra can be well described with single power-law
models in both exposure...
Satoko Takahashi, Masao Saito, Nagayoshi Ohashi, Nobuhiko Kusakabe, Shigehisa Takakuwa, Yoshito Shimajiri, Motohide Tamura, Ryohei Kawabe
The Astrophysical Journal   688(1) 344-361   Nov 2008   [Refereed]
Using the ASTE 10 m submillimeter telescope and the 1.4 m Infrared Survey
Facility (IRSF), we performed an extensive outflow survey in the Orion
Molecular Cloud -2 and -3 region. Our survey, which includes 41 potential
star-forming sites, has been...
Yoshito Shimajiri, Satoko Takahashi, Shigehisa Takakuwa, Masao Saito, Ryohei Kawabe
The Astrophysical Journal   683(1) 255-266   Aug 2008   [Refereed]
We have carried out the observations of the OMC-2 FIR 3/4 region with the NMA
and ASTE in the HTexCOTex (1--0), TexCO (3--2, 1--0), SiO (Tex=0,
Tex=2--1), CS (2--1), and CHTexOH (Tex=7Tex--6Tex) lines and in the 3.3 mm
continuum em...

Association Memberships


Research Grants & Projects

Observational Evidence for Outflow-Triggered Star Formation in OMC-2/FIR3,4 Region
Project Year: Jun 2008       Investigator(s): SHIMAJIRI YOSHITO