CON-quest

نویسندگان

چکیده

Some luminous and ultraluminous infrared galaxies (LIRGs ULIRGs) host extremely compact dusty nuclei. The intense radiation arising from warm dust in these sources is prone to excite vibrational levels of molecules such as HCN. This results emission the rotational transitions vibrationally excited HCN (HCN-vib), with brightest found obscured nuclei (CONs). We aim establish how common CONs are local Universe, whether their prevalence depends on luminosity or other properties galaxy. have conducted an Atacama Large Millimeter/submillimeter Array (ALMA) survey J=3-2 transition HCN-vib a sample 46 far-infrared galaxies. Compact identified 38 percent ULIRGs, 21 LIRGs, 0 lower find no dependence inclination galaxy, but strong evidence IRAS 25 60 {\mu}m flux density ratios (f25/f60) compared rest sample. Furthermore, we that stronger silicate features (s9.7{\mu}m) similar PAH equivalent widths (EQW6.2{\mu}m) In primarily (U)LIRGs. High resolution continuum observations individual required determine if CON phenomenon related inclinations nuclear disks. f25/f60 well for mid-infrared diagnostics investigated consistent large columns shifting longer wavelengths, making mid- "photospheres" significantly cooler than interior regions. To assess importance context galaxy evolution, it necessary extend this study higher redshifts where (U)LIRGs more common.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود 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

Pro & Con

horacic endovascular aortic repair (TEVAR) has become aneurysms were included and the extent of aortic coverage or Testablished as a less invasive option for the management of descending thoracic aortic diseases compared with conventional open surgical repair. TEVAR has reduced morbidity and mortality compared with open surgical repair, but still it is associated with a significant risk of spin...

متن کامل

Con guration Sequencing with Self Con gurable Binary Multipliers

In this paper we present a hardware design technique which utilises runtime recon guration for a particular class of applications. For a multiplication circuit implemented within an FPGA, a speci c instance of multiplying by a constant provides a signi cant reduction of required logic when compared to the generic case when multiplying any two arbitrary values. The use of recon guration allows t...

متن کامل

Tratamiento del desbalance en problemas con múltiples clases con ECOC

Imbalanced training sample means that one class is represented by a large number of examples while the other is represented by only a few. This problem may produce an important deterioration of the classifier performance, in particular with patterns belonging to the less represented classes. The majority of the studies in this area are oriented, mainly, to resolve problems with two classes. How...

متن کامل

Pirfenidone for IPF: pro/con debate; the 'con' viewpoint.

Improving outcomes for patients with idiopathic pulmonary fibrosis (IPF) remains a major unmet healthcare need— in this, we entirely agree with the ‘pro’ debate article by Gisli Jenkins. In this regard, the efforts of drug companies in developing novel drugs and collaboration with expert clinical investigators in the field of IPF in wanting to demonstrate the therapeutic efficacy for patients w...

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 and Astrophysics

سال: 2021

ISSN: ['0004-6361', '1432-0746']

DOI: https://doi.org/10.1051/0004-6361/202039291