Protostars and Planets VI, Heidelberg, July 15-20, 2013
Poster 1S028
A HERSCHEL LOOK TO STAR FORMATION IN THE THIRD GALACTIC QUADRANT
Elia, Davide (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Molinari, Sergio (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Fukui, Yasuo (Department of Physics, Nagoya University, Japan)
Schisano, Eugenio (Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA, USA)
Olmi, Luca (Osservatorio Astrofisico di Arcetri - INAF, Firenze, Italy)
Veneziani, Marcella (Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA, USA)
Hayakawa, Takahiro (Department of Physics, Nagoya University, Japan)
Pestalozzi, Michele (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Schneider, Nicola (IRFU/SAp CEA/DSM, Laboratoire AIM CNRS, Université Paris Diderot, Gif-sur-Yvette, France)
Benedettini, Milena (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Di Giorgio, Anna Maria (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Ikhenaode, David (Dipartimento di Ingegneria dell¡¯Informazione, Elettronica e Telecomunicazioni, Università di Roma La Sapienza, Roma, Italy)
Mizuno, Akira (Solar-Terrestrial Environment Laboratory, Nagoya University, Japan)
Onishi, Toshikazu (Department of Physical Science, Osaka Prefecture University, Japan)
Pezzuto, Stefano (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Piazzo, Lorenzo (Dipartimento di Ingegneria dell¡¯Informazione, Elettronica e Telecomunicazioni, Università di Roma La Sapienza, Roma, Italy)
Polychroni, Danai (Department of Astrophysics, Astronomy and Mechanics, Faculty of Physics, University of Athens, Greece)
Rygl, Kazi Lucie Jessica (Istituto di Astrofisica e Planetologia Spaziali - INAF, Roma, Italy)
Yamamoto, Hiroaki (Department of Physics, Nagoya University, Japan)
Maruccia, Ylenia (Dipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy)
Abstract:
The first Hi-GAL observations of the outer Galaxy consist of five dust continuum maps, between 70 and 500 ¥ìm, of the area delimited by 216.5◦ < §¤ < 225.5◦ and −2◦ < b < 0◦). NANTEN CO(1-0) line observations are used to derive cloud kinematics and distances, making it possible to estimate physical parameters of the compact sources (cores and clumps) detected in the region,
namely 255 proto-stellar and 590 pre-stellar sources, respectively. Both source typologies are found in all the distance components observed in the field, up to ¡ 5.8 kpc, testifying the presence of star formation beyond the Perseus arm at these longitudes. Furthermore, several sources of both protoand
pre-stellar nature are compatible with requirements for massive star formation, based on the mass-radius relation. For the pre-stellar sources belonging to the Local arm (d < 1.5 kpc) we study the mass function, whose high-mass end shows a power-law behavior N(logM) ¡ğ M^(−1.0¡¾0.2). Finally,
we use a luminosity versus mass diagram to infer the evolutionary status of the sources, finding that most of the proto-stellar are in the early accretion phase (with some cases compatible with a Class¡I stage), while for pre-stellar sources, in general, accretion has not started yet.
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