Discovery of calcite in the solar type protostar NGC 1333-IRAS 4

نویسندگان
چکیده

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Discovery of calcite in the solar type protostar NGC 1333-IRAS 4

We present observations, obtained with ISO-LWS, of the continuum between 50–200 μm of the solar type protostar IRAS 4, in the NGC 1333 complex. The continuum presents an excess, around 95 μm, that we demonstrate must be a dust feature. We compared the 95 μm excess with the calcite feature at 92 μm and find that it fits the observations reasonably well. There may be a further contribution from h...

متن کامل

Strongly induced collapse in the Class 0 protostar NGC 1333 IRAS 4 A

Context. The onset of gravitational collapse in cluster-forming clouds is still poorly known. Aims. Our goal is to use the Class 0 protostar IRAS 4A, which is undergoing collapse in the active molecular cloud NGC 1333, to set constraints on this process. In particular we want to measure the mass infall rate and investigate whether the collapse could have been triggered by a strong external pert...

متن کامل

The extremely collimated bipolar H 2 O jet from the NGC 1333 – IRAS 4 B protostar

Context. We have performed observations of water maser emission towards a sample of low-mass protostars, in order to investigate the properties of jets associated with the earliest stages of star formation and their interaction with the surrounding

متن کامل

A molecular line study of NGC 1333/IRAS 4.

Molecular line surveys and fully sampled spectral line maps at 1.3 and 0.87 mm are used to examine the physical and chemical characteristics of the extreme Class I sources IRAS 4A and 4B in the L1450/NGC 1333 molecular cloud complex. A very well collimated, jetlike molecular outflow emanates from IRAS 4A, with a dynamical age of a few thousand years. Symmetric, clumpy structure along the outf...

متن کامل

Detection of HCOOCH3 toward a Low-Mass Protostar, NGC 1333 IRAS 4B

The rotational spectral lines of methylformate (HCOOCH3) have been detected toward a low-mass protostar, NGC 1333 IRAS 4B, with the Nobeyama 45m radio telescope. The column density is derived to be (7–37)× 1015 cm−2, assuming a source size of 1′′ and the range of the excitation temperature to be from 50K to 200K. The column density is almost comparable to those found in other low-mass star-form...

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

ژورنال

عنوان ژورنال: Astronomy & Astrophysics

سال: 2002

ISSN: 0004-6361,1432-0746

DOI: 10.1051/0004-6361:20021490