Results 61 to 70 of about 64,602 (241)

Automated Morgan Keenan Classification of Observed Stellar Spectra Collected by the Sloan Digital Sky Survey Using a Single Classifier [PDF]

, 2019
The classification of stellar spectra is a fundamental task in stellar astrophysics. Stellar spectra from the Sloan Digital Sky Survey are applied to standard classification methods, k-nearest neighbors and random forest, to automatically classify the ...
Andonie, Răzvan, Brice, Michael J.
core   +1 more source

The Breakthrough Listen Search for Intelligent Life: A Laser Search Pipeline for the Automated Planet Finder

The Astronomical Journal, 2023
The Search for Extraterrestrial Intelligence has traditionally been conducted at radio wavelengths, but optical searches are well-motivated and increasingly feasible due to the growing availability of high-resolution spectroscopy.
Anna Zuckerman, Zoe Ko, Howard Isaacson, Steve Croft, Danny Price, Matt Lebofsky, Andrew Siemion   +6 more
doaj   +1 more source

Insertion of the FeB cofactor in cNORs lacking metal inserting chaperones

FEBS Letters, EarlyView.
Nitric oxide reductase is an enzyme found in the bacterial denitrification pathway. The NOR active site contains a non‐heme iron, often, but not always inserted with the assistance of chaperones. Here, we study the insertion of FeB in the subfamily of cNORs lacking chaperones and found a putative channel, conserved in the family, perhaps enabling the ...
Sofia Appelgren, Pia Ädelroth
wiley   +1 more source

Evolved Massive Stars at Low Metallicity. VII. The Lower Mass Limit of the Red Supergiant Population in the Large Magellanic Cloud

The Astrophysical Journal
The precise definition of the lower mass limit of red supergiant stars (RSGs) is an open question in astrophysics and does not attract much attention.
Ming Yang, Bo Zhang, Biwei Jiang, Jian Gao, Yi Ren, Shu Wang, Man I Lam, Hao Tian, Changqing Luo, Bingqiu Chen, Jing Wen   +10 more
doaj   +1 more source

Distinct dysregulated pathways in sporadic and Lynch syndrome‐associated colorectal cancer offer insights for targeted treatment

FEBS Letters, EarlyView.
This study explores the distinct molecular mechanisms underlying Lynch syndrome‐associated and sporadic colorectal cancer (CRC). By highlighting the therapeutic potential of targeting the PI3K‐Akt pathway in Lynch syndrome‐associated CRC and the Wnt pathway in sporadic CRC, the findings open avenues for personalised treatment strategies, aiming to ...
May J. Krause, Musalula Sinkala, Raj Ramesar   +2 more
wiley   +1 more source

Detecting Quasars in Large-Scale Astronomical Surveys

, 2011
We present a classification-based approach to identify quasi-stellar radio sources (quasars) in the Sloan Digital Sky Survey and evaluate its performance on a manually labeled training set.
Bomanns, Dominik, Dettmar, Ralf-Jürgen, Gieseke, Fabian, Kramer, Oliver, Polsterer, Kai Lars, Thom, Andreas, Vahrenhold, Jan, Zinn, Peter-Christian   +7 more
core   +1 more source

Immunoregulatory mechanisms of the arachidonic acid pathway in cancer

FEBS Letters, EarlyView.
The central role of the arachidonic acid (AA) pathway in anticancer immunity. Enzymes and metabolites of the AA pathway can play both immunosuppressive and immunostimulatory roles in the tumor microenvironment. Therefore, their tailored targeting could be beneficial as a standalone therapy or in combination with current cancer immunotherapy.
Maria Tredicine, Matteo Mucci, Antonio Recchiuti, Domenico Mattoscio   +3 more
wiley   +1 more source

The stellar population of the star forming region G61.48+0.09

, 2009
- Context: We present the results of a near-infrared photometric and spectroscopic study of the star forming region G61.48+0.09. - Aims: The purpose of this study is to characterize the stellar content of the cluster and to determine its distance ...
A. Font-Ribera, A. Herrero, A. Lenorzer, A. Marín-Franch, Andrillat, Aparicio, Benjamin, Bica, Bik, Borissova, Breger, Castelli, Cesaroni, Chini, Churchwell, Clark, Clark, Clark, Comerón, Comerón, D. Figer, Davies, de Wit, Deharveng, Dehnen, Ducati, Dutra, Eikenberry, F. Najarro, Figer, Figer, Figer, Figer, Fitzpatrick, Froebrich, Garay, Gehrz, Hanson, Hanson, Hanson, Hanson, Herrero, Herrero, Humphreys, Jiang, Johnson, Kiminki, Knödlseder, Koornneef, Kudritzki, Larsen, López-Corredoira, Martins, Massey, Massey, Massey, Mathys, Mercer, Messineo, Meynet, Pietrinferni, Puga, Puls, Reifenstein, Repolust, Rieke, Rieke, S. Ramirez, Sanders, Santolaya-Rey, Schaller, Skrutskie, Solomon, Stetson, van den Bergh, Walborn, Walborn, Wallace, Wallace, Wegner, Zhu   +80 more
core   +1 more source

The multiple roles of the NlpC_P60 peptidase family in mycobacteria – an underexplored target for antimicrobial drug discovery

FEBS Letters, EarlyView.
The NlpC_P60 superfamily of peptidases is recognised by its key role in bacterial cell wall homeostasis. Recently, studies have also described the involvement of NlpC_P60‐like enzymes in bacterial competitive mechanisms and pathogenesis across several lineages.
Catharina dos Santos Silva, Marcio Vinicius Bertacine Dias   +1 more
wiley   +1 more source

starkiller: Subtracting Stars and Other Sources from IFU Spectroscopic Data Through Forward Modeling

The Astronomical Journal
We present starkiller , an open-source Python package for forward-modeling flux retrieval from integral field unit (IFU) spectrograph data cubes. starkiller simultaneously provides stellar spectral classification, relative velocity, and line-of-sight ...
Ryan Ridden-Harper, Michele T. Bannister, Sophie E. Deam, Thomas Nordlander   +3 more
doaj   +1 more source