Massive Molecular Outflows

نویسندگان

  • H. Beuther
  • P. Schilke
  • F. Wyrowski
چکیده

Well established correlations of low-mass flows show a continuity in the high-mass regime, and mean accretion rates for L > 1000 L ⊙ are ˙ M accr ∼ 10 −4 M ⊙ yr −1. We also present a tight correlation between outflow masses and core masses, which implies that the accretion rate is to first order a linear function of the core mass. All those results support the idea that similar physical processes drive outflows of all masses.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar X iv : a st ro - p h / 04 04 56 3 v 1 2 8 A pr 2 00 4 Outflows and jets from massive star - forming clusters

Studying outflows from young massive star-forming clusters allows one to deduce physical processes that lead to the formation of the most massive stars. I will review the current state of high-spatial-resolution in-terferometric (sub-)mm studies of massive molecular outflows and their implications for high-mass star formation. A possible evolutionary scenario for massive outflows with highly co...

متن کامل

Precursors of Uchii Regions & the Evolution of Massive Outflows

Since this contributions was meant to cover two subjects which are both in the field of massive star formation but which in its details can be discussed separately, this paper is divided in two sections. First, we present characteristics of precursors of UCHii regions and their likely evolutionary properties. The second section discusses massive molecular outflows, their implications for high-m...

متن کامل

Molecular outflows around high-mass young stellar objects

We present a study of molecular outflows using high-resolution mapping of the CO (1-0) line emission toward eight relatively nearby 6.7 GHz methanol masers, which are associated with massive star forming regions. Outflows were detected in seven out of eight sources, and five of them clearly show bipolar or multiple outflow morphologies. These outflows have typical masses of a few solar masses, ...

متن کامل

Effect of the temperature profile of the accretion disk on the structure of jets and outflows around protostars

Magnetic fields play an important role in creating, driving, and in the evolution of outflows and jets from protostars and accretion disks. On the other hand, the temperature profile of the accretion disks may also affect the structure of the magnetic field and outflows. In this paper, we use the self-similar method in cylindrical coordinates to investigate the effect of the temperature profile...

متن کامل

Massive molecular outflows and evidence for AGN feedback from CO observations⋆⋆⋆

We study the properties of massive, galactic-scale outflows of molecular gas and investigate their impact on galaxy evolution. We present new IRAM PdBI CO(1-0) observations of local ULIRGs and QSO hosts: clear signature of massive and energetic molecular outflows, extending on kpc scales, is found in the CO(1-0) kinematics of four out of seven sources, with measured outflow rates of several 100...

متن کامل

Molecular Outflows and a Mid-infrared Census of the Massive Star Formation Region Associated with Iras 18507+0121

We have observed the central region of the infrared-dark cloud filament associated with IRAS 18507+0121 at millimeter wavelengths in CO(J 1⁄4 1Y0), CO(J 1⁄4 1Y0), and CO(J 1⁄4 1Y0) line emission andwith Spitzer at midinfrared wavelengths. Five massive outflows from two cloud cores were discovered. Three outflows are centered on or near an ultracompact (UC) H ii region (G34.4+0.23), while the re...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001