Zobrazeno 1 - 10
of 167
pro vyhledávání: '"Khosroshahi, Habib G."'
Autor:
Farhang, Amin, Smoker, Jonathan, Cox, Nick L. J., Cami, Jan, Linnartz, Harold, van Loon, Jacco Th., Cordiner, Martin A., Sarre, Peter J., Khosroshahi, Habib G., Ehrenfreund, Pascale, Foing, Bernard H., Kaper, Lex, Laverick, Mike
Publikováno v:
A&A 678, A148 (2023)
Interstellar lines observed toward stellar targets change slowly over long timescales, mainly due to the proper motion of the background target relative to the intervening clouds. On longer timescales, the cloud's slowly changing physical and chemica
Externí odkaz:
http://arxiv.org/abs/2308.14027
Autor:
Abdollahi, Hedieh, Javadi, Atefeh, Mirtorabi, Mohammad Taghi, Saremi, Elham, van Loon, Jacco Th., Khosroshahi, Habib G., McDonald, Iain, Khalouei, Elahe, Mahani, Hamidreza, Aghdam, Sima Taefi, Saberi, Maryam, Torki, Maryam
We present a photometric study of the resolved stellar populations in And IX, the closest satellite to the M31, a metal-poor and low-mass dwarf spheroidal galaxy. We estimate a distance modulus of $24.56_{-0.15}^{+0.05}$ mag based on the tip of the r
Externí odkaz:
http://arxiv.org/abs/2302.07674
Autor:
Parto, Tahere, Dehghani, Shahrzad, Javadi, Atefeh, Saremi, Elham, van Loon, Jacco Th., Khosroshahi, Habib G., McDonald, Iain, Mirtorabi, Mohammad T., Navabi, Mahdieh, Saberi, Maryam
We conducted an optical monitoring survey of the Sagittarius dwarf irregular galaxy (SagDIG) during the period of June 2016 -- October 2017, using the 2.5-m Isaac Newton Telescope (INT) at La Palama. Our goal was to identify Long Period Variable star
Externí odkaz:
http://arxiv.org/abs/2211.10695
Autor:
Ghaziasgar, Sepideh, Masoudnezhad, Amirhossein, Javadi, Atefeh, van Loon, Jacco Th., Khosroshahi, Habib G., Khosravaninezhad, Negin
We proposed a machine learning approach to identify and distinguish dusty stellar sources employing supervised and unsupervised methods and categorizing point sources, mainly evolved stars, using photometric and spectroscopic data collected over the
Externí odkaz:
http://arxiv.org/abs/2211.03403
Autor:
Saremi, Elham, Javadi, Atefeh, Navabi, Mahdieh, van Loon, Jacco Th., Khosroshahi, Habib G., Arbab, Behzad Bojnordi, McDonald, Iain
An optical monitoring survey in the nearby dwarf galaxies was carried out with the 2.5-m Isaac Newton Telescope (INT). 55 dwarf galaxies and four isolated globular clusters in the Local Group (LG) were observed with the Wide Field Camera (WFC). The m
Externí odkaz:
http://arxiv.org/abs/2110.03185
We present an investigation of the magnetic activity and flare characteristics of the sub-giant stars mostly from F and G spectral types and compare the results with the main-sequence (MS) stars. The light curve of 352 stars on the sub-giant branch (
Externí odkaz:
http://arxiv.org/abs/2103.00478
Autor:
Navabi, Mahdieh, Saremi, Elham, Javadi, Atefeh, Noori, Majedeh, van Loon, Jacco Th., Khosroshahi, Habib G., McDonald, Iain, Alizadeh, Mina, Danesh, Arash, Gozaliasl, Ghassem, Molaeinezhad, Alireza, Parto, Tahere, Raouf, Mojtaba
Publikováno v:
The Astrophysical Journal, 910:127 (16pp), 2021 April 1
We have examined the star formation history (SFH) of Andromeda VII (And VII), the brightest and most massive dwarf spheroidal (dSph) satellite of the Andromeda galaxy (M 31). Although M 31 is surrounded by several dSph companions with old stellar pop
Externí odkaz:
http://arxiv.org/abs/2101.09900
Autor:
Raouf, Mojtaba, Smith, Rory, Khosroshahi, Habib G., van de Sande, Jesse, Bryant, Julia J., Cortese, Luca, Brough, S., Croom, Scott M., Hwang, Ho Seong, Driver, Simon, López-Sánchez, Ángel R., Ko, Jongwan, Kim, Jae-Woo, Shin, Jihye, Scott, Nicholas, Bland-Hawthorn, Joss, Richards, Samuel N., Owers, Matt, Lawrence, J. S., Konstantopoulos, Iraklis S.
We study the stellar and gas kinematics of the brightest group galaxies (BGGs) in dynamically relaxed and unrelaxed galaxy groups for a sample of 154 galaxies in the SAMI galaxy survey. We characterize the dynamical state of the groups using the lumi
Externí odkaz:
http://arxiv.org/abs/2012.08634
Autor:
Haghighi, Mohammad H. Zhoolideh, Raouf, Mojtaba, Khosroshahi, Habib. G., Farhang, Amin, Gozaliasl, Ghassem
We characterize the relaxation state of galaxy systems by providing an assessment of the reliability of the photometric and spectroscopic probe via the semi-analytic galaxy evolution model. We quantify the correlations between the dynamical age of si
Externí odkaz:
http://arxiv.org/abs/2009.14217
Autor:
Raouf, Mojtaba, Smith, Rory, Khosroshahi, Habib G., Dariush, Ali A., Driver, Simon, Ko, Jongwan, Hwang, Ho Seong
We study the stellar populations of the brightest group galaxies (BGGs) in groups with different dynamical states, using GAMA survey data. We use two independent, luminosity dependent indicators to probe the relaxedness of their groups; the magnitude
Externí odkaz:
http://arxiv.org/abs/1911.02976