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首页> 外文会议>Star clusters in the era of large surveys >Probing the Low-Mass End of the IMF in Star-Forming Regions: A WIRCam/CFHT Survey
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Probing the Low-Mass End of the IMF in Star-Forming Regions: A WIRCam/CFHT Survey

机译：探索星际地区的IMF低质量末期：WIRCam / CFHT调查

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摘要

One of the most attempted goals of star formation theories is to determine the dominant process by which brown dwarfs form and the implications of the environment on its outcome. Current theories must be able to reproduce not only the observed shape of the IMF, but predict observable properties of clusters such as multiplicity, mass segregation, frequency and sizes of discs, accretion, etc. The new observational frontier is therefore the detection and characterization of very low mass objects in star forming regions, to confront model predictions from numerical simulations of the collapse of molecular clouds to the observed properties of YSOs. This is the main driver behind a WIRCam large program that has been conducted at CFHT to detect BD with masses between 1 and 30 Jupiter masses in a sample of 6 young clusters. I will present the main results obtained so far for the p Ophiuchi molecular cloud and IC 348, where a spectroscopic follow-up of many of these candidates is being conducted using several facilities (TNG, GTC, NTT, VLT, Gemini) to ascertain their spectral types and masses, and ultimately, to construct the low-mass end of the IMF for those star forming regions.
机译：恒星形成理论最尝试的目标之一是确定褐矮星形成的主要过程以及环境对其结局的影响。当前的理论不仅必须能够再现观察到的IMF形状，而且必须能够预测星团的可观察特性，例如多重性，质量偏析，盘的频率和大小，吸积等。因此，新的观察领域是对IMF的检测和表征。在恒星形成区域中非常低质量的物体，要面对从分子云坍塌的数值模拟到YSOs观测到的特性的模型预测。这是在CFHT上进行的WIRCam大型程序背后的主要驱动力，该程序可在6个年轻星团的样本中检测质量在1至30木星质量之间的BD。我将介绍迄今为止获得的p Ophiuchi分子云和IC 348的主要结果，其中将使用几种设备（TNG，GTC，NTT，VLT，Gemini）对其中许多候选物进行光谱跟踪，以确定其光谱类型和质量，并最终为那些恒星形成区域构建IMF的低质量端。

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    Catarina Alves de Oliveira; Estelle Moraux; Jerome Bouvier; Andrew Burgess; Herve Bouy; Chiara Marmo; Patrick Hudelot;

  • 作者单位

    Laboratoire d'Astrophysique de Grenoble, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 9, France;

    Laboratoire d'Astrophysique de Grenoble, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 9, France;

    Laboratoire d'Astrophysique de Grenoble, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 9, France;

    Laboratoire d'Astrophysique de Grenoble, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 9, France;

    CAB-LAEFF, Apartado 78, E-28691 Villanueva de la Caada, Madrid, Spain;

    Institut d'Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France;

    Institut d'Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France;

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  • 正文语种 eng
  • 中图分类 天文学;
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