The Lyman alpha reference sample VI. Lyman alpha escape from the edge-on disk galaxy Mrk 1486
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00471836" target="_blank" >RIV/67985815:_____/16:00471836 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1051/0004-6361/201526876" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201526876</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201526876" target="_blank" >10.1051/0004-6361/201526876</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
The Lyman alpha reference sample VI. Lyman alpha escape from the edge-on disk galaxy Mrk 1486
Popis výsledku v původním jazyce
We aim to understand how a strong Ly alpha emission line is able to escape from the low-redshift highly inclined (edge-on) disk galaxy Mrk 1486 (z similar to 0.0338). To our knowledge, this work is the first observational study of Ly alpha transport inside an edge-on disk galaxy.nWhile a pronounced Ly alpha absorption line emerges from the disk of Mrk 1486, very extended Ly alpha structures are observed at large radii from the galaxy center: a large Ly alpha-halo and two very bright Ly alpha regions located slightly above and below the disk plane. The analysis of IFU H alpha spectroscopic data of Mrk 1486 indicates the presence of two bipolar outflowing halos of HI gas at the same location as these two bright Ly alpha regions. Comparing different diagnostic diagrams (such as [OIII](5007)/H beta versus [OI](6300)/H alpha) to photo-and shock-ionization models, we find that the Ly alpha production of Mrk 1486 is dominated by photoionization inside the galaxy disk. From this perspective, our numerical simulations succeed in reproducing the strength and shape of the observed Ly alpha emission line of Mrk 1486 by assuming a scenario in which the Ly alpha photons are produced inside the galaxy disk, travel along the outflowing halos, and scatter on cool HI materials toward the observer.
Název v anglickém jazyce
The Lyman alpha reference sample VI. Lyman alpha escape from the edge-on disk galaxy Mrk 1486
Popis výsledku anglicky
We aim to understand how a strong Ly alpha emission line is able to escape from the low-redshift highly inclined (edge-on) disk galaxy Mrk 1486 (z similar to 0.0338). To our knowledge, this work is the first observational study of Ly alpha transport inside an edge-on disk galaxy.nWhile a pronounced Ly alpha absorption line emerges from the disk of Mrk 1486, very extended Ly alpha structures are observed at large radii from the galaxy center: a large Ly alpha-halo and two very bright Ly alpha regions located slightly above and below the disk plane. The analysis of IFU H alpha spectroscopic data of Mrk 1486 indicates the presence of two bipolar outflowing halos of HI gas at the same location as these two bright Ly alpha regions. Comparing different diagnostic diagrams (such as [OIII](5007)/H beta versus [OI](6300)/H alpha) to photo-and shock-ionization models, we find that the Ly alpha production of Mrk 1486 is dominated by photoionization inside the galaxy disk. From this perspective, our numerical simulations succeed in reproducing the strength and shape of the observed Ly alpha emission line of Mrk 1486 by assuming a scenario in which the Ly alpha photons are produced inside the galaxy disk, travel along the outflowing halos, and scatter on cool HI materials toward the observer.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10308 - Astronomy (including astrophysics,space science)
Návaznosti výsledku
Projekt
<a href="/cs/project/GP14-20666P" target="_blank" >GP14-20666P: Původ emise a absorpce Lyman alfa v galaxiích</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Astronomy & Astrophysics
ISSN
1432-0746
e-ISSN
—
Svazek periodika
587
Číslo periodika v rámci svazku
March
Stát vydavatele periodika
FR - Francouzská republika
Počet stran výsledku
24
Strana od-do
"A77/1"-"A77/24"
Kód UT WoS článku
000371589800088
EID výsledku v databázi Scopus
2-s2.0-84959018436