Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Khostovan, Ali Ahmad"'
Autor:
Khostovan, Ali Ahmad, Malhotra, Sangeeta, Rhoads, James E., Sobral, David, Harish, Santosh, Tilvi, Vithal, Coughlin, Alicia, Rezaee, Saeed
We investigate the `intrinsic' H$\alpha$ EW distributions of $z \sim 0.4 - 2.2$ narrowband-selected H$\alpha$ samples from HiZELS and DAWN using a forward modeling approach. We find an EW - stellar mass anti-correlation with steepening slopes $-0.18\
Externí odkaz:
http://arxiv.org/abs/2408.00080
Autor:
Casey, Caitlin M., Kartaltepe, Jeyhan S., Drakos, Nicole E., Franco, Maximilien, Harish, Santosh, Paquereau, Louise, Ilbert, Olivier, Rose, Caitlin, Cox, Isabella G., Nightingale, James W., Robertson, Brant E., Silverman, John D., Koekemoer, Anton M., Massey, Richard, McCracken, Henry Joy, Rhodes, Jason, Akins, Hollis B., Amvrosiadis, Aristeidis, Arango-Toro, Rafael C., Bagley, Micaela B., Bongiorno, Angela, Capak, Peter L., Champagne, Jaclyn B., Chartab, Nima, Ortiz, Oscar A. Chavez, Chworowsky, Katherine, Cooke, Kevin C., Cooper, Olivia R., Darvish, Behnam, Ding, Xuheng, Faisst, Andreas L., Finkelstein, Steven L., Fujimoto, Seiji, Gentile, Fabrizio, Gillman, Steven, Gould, Katriona M. L., Gozaliasl, Ghassem, Hayward, Christopher C., He, Qiuhan, Hemmati, Shoubaneh, Hirschmann, Michaela, Jahnke, Knud, Jin, Shuowen, Khostovan, Ali Ahmad, Kokorev, Vasily, Lambrides, Erini, Laigle, Clotilde, Larson, Rebecca L., Leung, Gene C. K., Liu, Daizhong, Liaudat, Tobias, Long, Arianna S., Magdis, Georgios, Mahler, Guillaume, Mainieri, Vincenzo, Manning, Sinclaire M., Maraston, Claudia, Martin, Crystal L., McCleary, Jacqueline E., McKinney, Jed, McPartland, Conor J. R., Mobasher, Bahram, Pattnaik, Rohan, Renzini, Alvio, Rich, R. Michael, Sanders, David B., Sattari, Zahra, Scognamiglio, Diana, Scoville, Nick, Sheth, Kartik, Shuntov, Marko, Sparre, Martin, Suzuki, Tomoko L., Talia, Margherita, Toft, Sune, Trakhtenbrot, Benny, Urry, C. Megan, Valentino, Francesco, Vanderhoof, Brittany N., Vardoulaki, Eleni, Weaver, John R., Whitaker, Katherine E., Wilkins, Stephen M., Yang, Lilan, Zavala, Jorge A.
We present the survey design, implementation, and outlook for COSMOS-Web, a 255 hour treasury program conducted by the James Webb Space Telescope in its first cycle of observations. COSMOS-Web is a contiguous 0.54 deg$^2$ NIRCam imaging survey in fou
Externí odkaz:
http://arxiv.org/abs/2211.07865
Autor:
Rezaee, Saeed, Reddy, Naveen A., Topping, Michael W., Shivaei, Irene, Shapley, Alice E., Fetherolf, Tara, Kriek, Mariska, Coil, Alison, Mobasher, Bahram, Siana, Brian, Du, Xinnan, Khostovan, Ali Ahmad, Weldon, Andrew, Emami, Najmeh, Chartab, Nima
Publikováno v:
2023, Monthly Notices of the Royal Astronomical Society,p. stad2842
The $\rm{H}\alpha$-to-UV luminosity ratio ($L(\rm H\alpha)/L(\rm UV)$) is often used to probe SFHs of star-forming galaxies and it is important to validate it against other proxies for burstiness. To address this issue, we present a statistical analy
Externí odkaz:
http://arxiv.org/abs/2208.12371
Autor:
Harish, Santosh, Wold, Isak G. B., Malhotra, Sangeeta, Rhoads, James, Hu, Weida, Wang, Junxian, Zheng, Zhen-ya, Barrientos, L. Felipe, González-López, Jorge, Perez, Lucia A., Khostovan, Ali Ahmad, Infante, Leopoldo, Jiang, Chunyan, Moya-Sierralta, Cristóbal, Pharo, John, Valdes, Francisco, Yang, Huan
We report spectroscopic confirmations of 15 Lyman-alpha galaxies at $z\sim7$, implying a spectroscopic confirmation rate of $\sim$80% on candidates selected from LAGER (Lyman-Alpha Galaxies in the Epoch of Reionization), which is the largest (24 deg$
Externí odkaz:
http://arxiv.org/abs/2111.01173
Autor:
Wold, Isak G. B., Malhotra, Sangeeta, Rhoads, James, Wang, Junxian, Hu, Weida, Perez, Lucia A., Zheng, Zhen-Ya, Khostovan, Ali Ahmad, Walker, Alistair R., Barrientos, L. Felipe, González-López, Jorge, Harish, Santosh, Infante, Leopoldo, Jiang, Chunyan, Pharo, John, Moya-Sierralta, Cristóbal, Bauer, Franz E., Galaz, Gaspar, Valdes, Francisco, Yang, Huan
We present a new measurement of the Ly$\alpha$ luminosity function at redshift $z=6.9$, finding moderate evolution from $z=5.7$ that is consistent with a fully or largely ionized $z\sim7$ intergalactic medium. Our result is based on four fields of th
Externí odkaz:
http://arxiv.org/abs/2105.12191
Autor:
Santos, Sérgio, Sobral, David, Butterworth, Josh, Paulino-Afonso, Ana, Ribeiro, Bruno, da Cunha, Elisabete, Calhau, João, Khostovan, Ali Ahmad, Matthee, Jorryt, Haro, Pablo Arrabal
We measure the evolution of the rest-frame UV luminosity function (LF) and the stellar mass function (SMF) of Lyman-alpha (Lya) emitters (LAEs) from z~2 to z~6 by exploring ~4000 LAEs from the SC4K sample. We find a correlation between Lya luminosity
Externí odkaz:
http://arxiv.org/abs/2105.00007
Autor:
Khostovan, Ali Ahmad, Malhotra, Sangeeta, Rhoads, James E., Harish, Santosh, Jiang, Chunyan, Wang, Junxian, Wold, Isak, Zheng, Zhen-Ya, Barrientos, L. Felipe, Coughlin, Alicia, Hu, Weida, Infante, Leopoldo, Perez, Lucia A., Pharo, John, Valdes, Francisco, Walker, Alistair R.
The H$\alpha$ equivalent width (EW) is an observational proxy for specific star formation rate (sSFR) and a tracer of episodic star-formation activity. Previous assessments show that EW strongly anti-correlates with stellar mass as $M^{-0.25}$ simila
Externí odkaz:
http://arxiv.org/abs/2103.10959
Autor:
Hu, Weida, Wang, Junxian, Infante, Leopoldo, Rhoads, James E., Zheng, Zhen-Ya, Yang, Huan, Malhotra, Sangeeta, Barrientos, L. Felipe, Jiang, Chunyan, González-López, Jorge, Prieto, Gonzalo, Perez, Lucia A., Hibon, Pascale, Galaz, Gaspar, Coughlin, Alicia, Harish, Santosh, Kong, Xu, Kang, Wenyong, Khostovan, Ali Ahmad, Pharo, John, Valdes, Francisco, Wold, Isak, Walker, Alistair R., Zheng, XianZhong
Protoclusters, the progenitors of the most massive structures in the Universe, have been identified at redshifts of up to 6.6. Besides exploring early structure formation, searching for protoclusters at even higher redshifts is particularly useful to
Externí odkaz:
http://arxiv.org/abs/2101.10204
Autor:
Harish, Santosh, Coughlin, Alicia, Rhoads, James E., Malhotra, Sangeeta, Finkelstein, Steven L., Stevans, Matthew, Tilvi, Vithal S., Khostovan, Ali Ahmad, Veilleux, Sylvain, Wang, Junxian, Hibon, Pascale, Zabl, Johnnes, Joshi, Bhavin, Pharo, John, Wold, Isak, Perez, Lucia A., Zheng, Zhen-Ya, Probst, Ronald, Swaters, Rob, Mobasher, Bahram, Jiang, Tianxing, Yang, Huan
We present new estimates of the luminosity function (LF) and star formation rate density (SFRD) for an H$\alpha$ selected sample at $z\sim0.62$ from the Deep And Wide Narrow-band (DAWN) survey. Our results are based on a new H$\alpha$ sample in the e
Externí odkaz:
http://arxiv.org/abs/2001.10544
Autor:
Khostovan, Ali Ahmad, Malhotra, Sangeeta, Rhoads, James E., Jiang, Chunyan, Wang, Junxian, Wold, Isak, Zheng, Zhen-Ya, Barrientos, L. Felipe, Coughlin, Alicia, Harish, Santosh, Hu, Weida, Infante, Leopoldo, Perez, Lucia A., Pharo, John, Valdes, Francisco, Walker, Alistair R., Yang, Huan
We present our measurements of the H$\alpha$, [OIII], and [OII] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 1577 $z = 0.47$ H$\alpha$-, 3933 $z = 0.93$ [OIII]-, and 5367 $z = 1
Externí odkaz:
http://arxiv.org/abs/2001.04989