Results 81 to 90 of about 207,560 (312)

The SPHINX M-dwarf Spectral Grid. I. Benchmarking New Model Atmospheres to Derive Fundamental M-dwarf Properties

The Astrophysical Journal, 2023
About 70%–80% of stars in our solar and Galactic neighborhood are M dwarfs. They span a range of low masses and temperatures relative to solar-type stars, facilitating molecule formation throughout their atmospheres.
Aishwarya R. Iyer, Michael R. Line, Philip S. Muirhead, Jonathan J. Fortney, Ehsan Gharib-Nezhad   +4 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Half a Million M Dwarf Stars Characterized Using Domain-adapted Spectral Analysis

The Astrophysical Journal Supplement Series
We present fundamental atmospheric parameters ( T _eff and $\mathrm{log}\,g$ ) and metallicities ([M/H]) for 507,513 M dwarf stars using low-resolution spectra ( R  ∼ 1800) from LAMOST DR10.
Shuo Zhang, Hua-Wei Zhang, Yuan-Sen Ting, Rui Wang, Teaghan O’Briain, Hugh R. A. Jones, Derek Homeier, A-Li Luo   +7 more
doaj   +1 more source

Fundamental Parameters and Abundances of Metal-Poor Stars: The SDSS Standard BD +17 4708 [PDF]

, 2006
The atmospheric parameters and iron abundance of the Sloan Digital Sky Survey (SDSS) spectrophotometric standard star BD +17 4708 are critically examined using up-to-date Kurucz model atmospheres, LTE line formation calculations, and reliable atomic data.
Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Alonso, Alonso, Arenou, Arnone, Asplund, Asplund, Asplund, Athay, Axer, Balachandran, Barklem, Barklem, Barklem, Barklem, Bell, Bensby, Bertelli, Biémont, Boesgaard, Bohlin, Bohlin, Bohlin, Bond, Burstein, C. Allende Prieto, Carney, Carney, Carretta, Cayrel de Strobel, Chen, Cowley, D. L. Lambert, Drawin, Edvardsson, Eriksson, Ferlet, Fitzgerald, Fitzpatrick, Fuhrmann, Fukugita, Fulbright, Fulbright, García-Gil, Gratton, Grevesse, Gunn, Gunn, Hakkila, Hubeny, Hubeny, I. Ramírez, Idiart, Jørgensen, Kim, King, Kiselman, Korn, Kurucz, Lallement, Lambert, Latham, Li, Magain, Magain, Meléndez, Meléndez, Mishenina, Morton, Nissen, Nissen, Nordström, O'Brian, Oke, Peterson, Pont, Rachford, Ramírez, Ramírez, Rebolo, Redfield, Redfield, Rufener, Ryan, Ryan, S. Redfield, Salaris, Schlegel, Schuster, Scott, Shchukina, Simmerer, Smith, Spite, Steenbock, Stehlé, Thévenin, Tull, Vandenberg, VandenBerg, Welty, Wheeler, Zhou   +107 more
core   +2 more sources

Fundamental Parameters of Be Stars Derived from Near-Infrared Spectra [PDF]

International Astronomical Union Colloquium, 2000
AbstractBecause of their spectral peculiarities, stellar parameters of objects undergoing the Be phenomenon cannot be determined in the same way as for normal B stars. In particular, the use of the first lines of the Hydrogen series is hampered by the presence of emission components. On the other end, the recently generalized use of CCD detectors, well
L. Houziaux, Y. Frémat
openaire   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Discovery of an Extremely r-process-enhanced Thin-disk Star with [Eu/H] = +0.78

The Astrophysical Journal Letters
Highly r -process-enhanced (RPE) stars are rare and usually metal poor ([Fe/H] < −1.0), and they mainly populate the Milky Way halo and dwarf galaxies. This study presents the discovery of a relatively bright ( V = 12.72), highly RPE ( r -II) star ([Eu ...
Xiao-Jin Xie, Jianrong Shi, Hong-Liang Yan, Tian-Yi Chen, Carlos Allende Prieto, Timothy C. Beers, Shuai Liu, Chun-Qian Li, Ming-Yi Ding, Yao-Jia Tang, Ruizhi Zhang, Renjing Xie   +11 more
doaj   +1 more source

Atmospheric parameters of 82 red giants in the Kepler field

, 2012
Context: Accurate fundamental parameters of stars are essential for the asteroseismic analysis of data from the NASA Kepler mission. Aims: We aim at determining accurate atmospheric parameters and the abundance pattern for a sample of 82 red giants that ...
A. O. Thygesen, Basu, Bedding, Bedding, Boyarchuk, Brown, Brown, Bruntt, Bruntt, Bruntt, Bruntt, Bruntt, C. Burke, C. Karoff, Casagrande, Cassisi, D. A. Caldwell, D. Stello, Donati, Gai, Grevesse, Gustafsson, H. Bruntt, Handberg, Hekker, Hekker, Hekker, Høg, J. L. Christiansen, Johnson, K. Brogaard, Kallinger, Kallinger, Kupka, Lobel, Luck, M. F. Andersen, Molenda-Żakowicz, Molenda-Żakowicz, Munari, Puzeras, Ramírez, S. Frandsen, S. Hekker, Smalley, Soubiran, T. Kallinger, White, Y. P. Elsworth, Zucker   +49 more
core   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

Time-series Spectroscopy and TESS Photometry of the Oscillating Eclipsing Algol System V389 Cassiopeiae

The Astronomical Journal
We present the results from a detailed analysis of our time-series spectroscopic observations and the Transiting Exoplanet Survey Satellite (TESS) photometric data of the eclipsing binary V389 Cas.
Pakakaew Rittipruk, Kyeongsoo Hong, Jae Woo Lee, Anirut Phriksee, Supachai Awiphan, Jae-Rim Koo, Jang-Ho Park   +6 more
doaj   +1 more source